java.nio
Class CharBuffer

java.lang.Object sample code for java.lang.Object definition code for java.lang.Object 
  extended by java.nio.Buffer sample code for java.nio.Buffer definition code for java.nio.Buffer 
      extended by java.nio.CharBuffer
All Implemented Interfaces:
Appendable sample code for java.lang.Appendable definition code for java.lang.Appendable , CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence , Comparable sample code for java.lang.Comparable definition code for java.lang.Comparable <CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer >, Readable sample code for java.lang.Readable definition code for java.lang.Readable

public abstract class CharBuffer
extends Buffer sample code for java.nio.Buffer definition code for java.nio.Buffer
implements Comparable sample code for java.lang.Comparable definition code for java.lang.Comparable <CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer >, Appendable sample code for java.lang.Appendable definition code for java.lang.Appendable , CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence , Readable sample code for java.lang.Readable definition code for java.lang.Readable

A character buffer.

This class defines four categories of operations upon character buffers:

Character buffers can be created either by allocation sample code for java.nio.CharBuffer.allocate(int) definition code for java.nio.CharBuffer.allocate(int) , which allocates space for the buffer's content, by wrapping sample code for java.nio.CharBuffer.wrap(char[]) definition code for java.nio.CharBuffer.wrap(char[]) an existing character array or string into a buffer, or by creating a view of an existing byte buffer

Like a byte buffer, a character buffer is either direct or non-direct. A character buffer created via the wrap methods of this class will be non-direct. A character buffer created as a view of a byte buffer will be direct if, and only if, the byte buffer itself is direct. Whether or not a character buffer is direct may be determined by invoking the isDirect sample code for java.nio.CharBuffer.isDirect() definition code for java.nio.CharBuffer.isDirect() method.

This class implements the CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence interface so that character buffers may be used wherever character sequences are accepted, for example in the regular-expression package java.util.regex.

Methods in this class that do not otherwise have a value to return are specified to return the buffer upon which they are invoked. This allows method invocations to be chained. The sequence of statements

 cb.put("text/");
 cb.put(subtype);
 cb.put("; charset=");
 cb.put(enc);
can, for example, be replaced by the single statement
 cb.put("text/").put(subtype).put("; charset=").put(enc);

Since:
1.4

Method Summary
static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer allocate sample code for java.nio.CharBuffer.allocate(int) definition code for java.nio.CharBuffer.allocate(int) (int capacity)
          Allocates a new character buffer.
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer append sample code for java.nio.CharBuffer.append(char) definition code for java.nio.CharBuffer.append(char) (char c)
          Appends the specified character to this buffer  (optional operation).
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer append sample code for java.nio.CharBuffer.append(java.lang.CharSequence) definition code for java.nio.CharBuffer.append(java.lang.CharSequence) (CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  csq)
          Appends the specified character sequence to this buffer  (optional operation).
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer append sample code for java.nio.CharBuffer.append(java.lang.CharSequence, int, int) definition code for java.nio.CharBuffer.append(java.lang.CharSequence, int, int) (CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  csq, int start, int end)
          Appends a subsequence of the specified character sequence to this buffer  (optional operation).
 char[] array sample code for java.nio.CharBuffer.array() definition code for java.nio.CharBuffer.array() ()
          Returns the character array that backs this buffer  (optional operation).
 int arrayOffset sample code for java.nio.CharBuffer.arrayOffset() definition code for java.nio.CharBuffer.arrayOffset() ()
          Returns the offset within this buffer's backing array of the first element of the buffer  (optional operation).
abstract  CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer asReadOnlyBuffer sample code for java.nio.CharBuffer.asReadOnlyBuffer() definition code for java.nio.CharBuffer.asReadOnlyBuffer() ()
          Creates a new, read-only character buffer that shares this buffer's content.
 char charAt sample code for java.nio.CharBuffer.charAt(int) definition code for java.nio.CharBuffer.charAt(int) (int index)
          Reads the character at the given index relative to the current position.
abstract  CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer compact sample code for java.nio.CharBuffer.compact() definition code for java.nio.CharBuffer.compact() ()
          Compacts this buffer  (optional operation).
 int compareTo sample code for java.nio.CharBuffer.compareTo(java.nio.CharBuffer) definition code for java.nio.CharBuffer.compareTo(java.nio.CharBuffer) (CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  that)
          Compares this buffer to another.
abstract  CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer duplicate sample code for java.nio.CharBuffer.duplicate() definition code for java.nio.CharBuffer.duplicate() ()
          Creates a new character buffer that shares this buffer's content.
 boolean equals sample code for java.nio.CharBuffer.equals(java.lang.Object) definition code for java.nio.CharBuffer.equals(java.lang.Object) (Object sample code for java.lang.Object definition code for java.lang.Object  ob)
          Tells whether or not this buffer is equal to another object.
abstract  char get sample code for java.nio.CharBuffer.get() definition code for java.nio.CharBuffer.get() ()
          Relative get method.
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer get sample code for java.nio.CharBuffer.get(char[]) definition code for java.nio.CharBuffer.get(char[]) (char[] dst)
          Relative bulk get method.
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer get sample code for java.nio.CharBuffer.get(char[], int, int) definition code for java.nio.CharBuffer.get(char[], int, int) (char[] dst, int offset, int length)
          Relative bulk get method.
abstract  char get sample code for java.nio.CharBuffer.get(int) definition code for java.nio.CharBuffer.get(int) (int index)
          Absolute get method.
 boolean hasArray sample code for java.nio.CharBuffer.hasArray() definition code for java.nio.CharBuffer.hasArray() ()
          Tells whether or not this buffer is backed by an accessible character array.
 int hashCode sample code for java.nio.CharBuffer.hashCode() definition code for java.nio.CharBuffer.hashCode() ()
          Returns the current hash code of this buffer.
abstract  boolean isDirect sample code for java.nio.CharBuffer.isDirect() definition code for java.nio.CharBuffer.isDirect() ()
          Tells whether or not this character buffer is direct.
 int length sample code for java.nio.CharBuffer.length() definition code for java.nio.CharBuffer.length() ()
          Returns the length of this character buffer.
abstract  ByteOrder sample code for java.nio.ByteOrder definition code for java.nio.ByteOrder order sample code for java.nio.CharBuffer.order() definition code for java.nio.CharBuffer.order() ()
          Retrieves this buffer's byte order.
abstract  CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer put sample code for java.nio.CharBuffer.put(char) definition code for java.nio.CharBuffer.put(char) (char c)
          Relative put method  (optional operation).
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer put sample code for java.nio.CharBuffer.put(char[]) definition code for java.nio.CharBuffer.put(char[]) (char[] src)
          Relative bulk put method  (optional operation).
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer put sample code for java.nio.CharBuffer.put(char[], int, int) definition code for java.nio.CharBuffer.put(char[], int, int) (char[] src, int offset, int length)
          Relative bulk put method  (optional operation).
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer put sample code for java.nio.CharBuffer.put(java.nio.CharBuffer) definition code for java.nio.CharBuffer.put(java.nio.CharBuffer) (CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  src)
          Relative bulk put method  (optional operation).
abstract  CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer put sample code for java.nio.CharBuffer.put(int, char) definition code for java.nio.CharBuffer.put(int, char) (int index, char c)
          Absolute put method  (optional operation).
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer put sample code for java.nio.CharBuffer.put(java.lang.String) definition code for java.nio.CharBuffer.put(java.lang.String) (String sample code for java.lang.String definition code for java.lang.String  src)
          Relative bulk put method  (optional operation).
 CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer put sample code for java.nio.CharBuffer.put(java.lang.String, int, int) definition code for java.nio.CharBuffer.put(java.lang.String, int, int) (String sample code for java.lang.String definition code for java.lang.String  src, int start, int end)
          Relative bulk put method  (optional operation).
 int read sample code for java.nio.CharBuffer.read(java.nio.CharBuffer) definition code for java.nio.CharBuffer.read(java.nio.CharBuffer) (CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  target)
          Attempts to read characters into the specified character buffer.
abstract  CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer slice sample code for java.nio.CharBuffer.slice() definition code for java.nio.CharBuffer.slice() ()
          Creates a new character buffer whose content is a shared subsequence of this buffer's content.
abstract  CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence subSequence sample code for java.nio.CharBuffer.subSequence(int, int) definition code for java.nio.CharBuffer.subSequence(int, int) (int start, int end)
          Creates a new character buffer that represents the specified subsequence of this buffer, relative to the current position.
 String sample code for java.lang.String definition code for java.lang.String toString sample code for java.nio.CharBuffer.toString() definition code for java.nio.CharBuffer.toString() ()
          Returns a string containing the characters in this buffer.
static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer wrap sample code for java.nio.CharBuffer.wrap(char[]) definition code for java.nio.CharBuffer.wrap(char[]) (char[] array)
          Wraps a character array into a buffer.
static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer wrap sample code for java.nio.CharBuffer.wrap(char[], int, int) definition code for java.nio.CharBuffer.wrap(char[], int, int) (char[] array, int offset, int length)
          Wraps a character array into a buffer.
static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer wrap sample code for java.nio.CharBuffer.wrap(java.lang.CharSequence) definition code for java.nio.CharBuffer.wrap(java.lang.CharSequence) (CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  csq)
          Wraps a string into a buffer.
static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer wrap sample code for java.nio.CharBuffer.wrap(java.lang.CharSequence, int, int) definition code for java.nio.CharBuffer.wrap(java.lang.CharSequence, int, int) (CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  csq, int start, int end)
          Wraps a character sequence into a buffer.
 
Methods inherited from class java.nio.Buffer sample code for java.nio.Buffer definition code for java.nio.Buffer
capacity sample code for java.nio.Buffer.capacity() definition code for java.nio.Buffer.capacity() , clear sample code for java.nio.Buffer.clear() definition code for java.nio.Buffer.clear() , flip sample code for java.nio.Buffer.flip() definition code for java.nio.Buffer.flip() , hasRemaining sample code for java.nio.Buffer.hasRemaining() definition code for java.nio.Buffer.hasRemaining() , isReadOnly sample code for java.nio.Buffer.isReadOnly() definition code for java.nio.Buffer.isReadOnly() , limit sample code for java.nio.Buffer.limit() definition code for java.nio.Buffer.limit() , limit sample code for java.nio.Buffer.limit(int) definition code for java.nio.Buffer.limit(int) , mark sample code for java.nio.Buffer.mark() definition code for java.nio.Buffer.mark() , position sample code for java.nio.Buffer.position() definition code for java.nio.Buffer.position() , position sample code for java.nio.Buffer.position(int) definition code for java.nio.Buffer.position(int) , remaining sample code for java.nio.Buffer.remaining() definition code for java.nio.Buffer.remaining() , reset sample code for java.nio.Buffer.reset() definition code for java.nio.Buffer.reset() , rewind sample code for java.nio.Buffer.rewind() definition code for java.nio.Buffer.rewind()
 
Methods inherited from class java.lang.Object sample code for java.lang.Object definition code for java.lang.Object
clone sample code for java.lang.Object.clone() definition code for java.lang.Object.clone() , finalize sample code for java.lang.Object.finalize() definition code for java.lang.Object.finalize() , getClass sample code for java.lang.Object.getClass() definition code for java.lang.Object.getClass() , notify sample code for java.lang.Object.notify() definition code for java.lang.Object.notify() , notifyAll sample code for java.lang.Object.notifyAll() definition code for java.lang.Object.notifyAll() , wait sample code for java.lang.Object.wait() definition code for java.lang.Object.wait() , wait sample code for java.lang.Object.wait(long) definition code for java.lang.Object.wait(long) , wait sample code for java.lang.Object.wait(long, int) definition code for java.lang.Object.wait(long, int)
 

Method Detail

allocate sample code for java.nio.CharBuffer.allocate(int) definition code for java.nio.CharBuffer.allocate(int)

public static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  allocate(int capacity)
Allocates a new character buffer.

The new buffer's position will be zero, its limit will be its capacity, and its mark will be undefined. It will have a backing array sample code for java.nio.CharBuffer.array() definition code for java.nio.CharBuffer.array() , and its array offset sample code for java.nio.CharBuffer.arrayOffset() definition code for java.nio.CharBuffer.arrayOffset() will be zero.

Parameters:
capacity - The new buffer's capacity, in characters
Returns:
The new character buffer
Throws:
IllegalArgumentException sample code for java.lang.IllegalArgumentException definition code for java.lang.IllegalArgumentException - If the capacity is a negative integer

wrap sample code for java.nio.CharBuffer.wrap(char[], int, int) definition code for java.nio.CharBuffer.wrap(char[], int, int)

public static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  wrap(char[] array,
                              int offset,
                              int length)
Wraps a character array into a buffer.

The new buffer will be backed by the given character array; that is, modifications to the buffer will cause the array to be modified and vice versa. The new buffer's capacity will be array.length, its position will be offset, its limit will be offset + length, and its mark will be undefined. Its backing array sample code for java.nio.CharBuffer.array() definition code for java.nio.CharBuffer.array() will be the given array, and its array offset sample code for java.nio.CharBuffer.arrayOffset() definition code for java.nio.CharBuffer.arrayOffset() will be zero.

Parameters:
array - The array that will back the new buffer
offset - The offset of the subarray to be used; must be non-negative and no larger than array.length. The new buffer's position will be set to this value.
length - The length of the subarray to be used; must be non-negative and no larger than array.length - offset. The new buffer's limit will be set to offset + length.
Returns:
The new character buffer
Throws:
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If the preconditions on the offset and length parameters do not hold

wrap sample code for java.nio.CharBuffer.wrap(char[]) definition code for java.nio.CharBuffer.wrap(char[])

public static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  wrap(char[] array)
Wraps a character array into a buffer.

The new buffer will be backed by the given character array; that is, modifications to the buffer will cause the array to be modified and vice versa. The new buffer's capacity and limit will be array.length, its position will be zero, and its mark will be undefined. Its backing array sample code for java.nio.CharBuffer.array() definition code for java.nio.CharBuffer.array() will be the given array, and its array offset sample code for java.nio.CharBuffer.arrayOffset() definition code for java.nio.CharBuffer.arrayOffset() will be zero.

Parameters:
array - The array that will back this buffer
Returns:
The new character buffer

read sample code for java.nio.CharBuffer.read(java.nio.CharBuffer) definition code for java.nio.CharBuffer.read(java.nio.CharBuffer)

public int read(CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  target)
         throws IOException sample code for java.io.IOException definition code for java.io.IOException 
Attempts to read characters into the specified character buffer. The buffer is used as a repository of characters as-is: the only changes made are the results of a put operation. No flipping or rewinding of the buffer is performed.

Specified by:
read sample code for java.lang.Readable.read(java.nio.CharBuffer) definition code for java.lang.Readable.read(java.nio.CharBuffer) in interface Readable sample code for java.lang.Readable definition code for java.lang.Readable
Parameters:
target - the buffer to read characters into
Returns:
The number of characters added to the buffer, or -1 if this source of characters is at its end
Throws:
IOException sample code for java.io.IOException definition code for java.io.IOException - if an I/O error occurs
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if target is null
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - if target is a read only buffer

wrap sample code for java.nio.CharBuffer.wrap(java.lang.CharSequence, int, int) definition code for java.nio.CharBuffer.wrap(java.lang.CharSequence, int, int)

public static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  wrap(CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  csq,
                              int start,
                              int end)
Wraps a character sequence into a buffer.

The content of the new, read-only buffer will be the content of the given character sequence. The buffer's capacity will be csq.length(), its position will be start, its limit will be end, and its mark will be undefined.

Parameters:
csq - The character sequence from which the new character buffer is to be created
start - The index of the first character to be used; must be non-negative and no larger than csq.length(). The new buffer's position will be set to this value.
end - The index of the character following the last character to be used; must be no smaller than start and no larger than csq.length(). The new buffer's limit will be set to this value.
Returns:
The new character buffer
Throws:
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If the preconditions on the start and end parameters do not hold

wrap sample code for java.nio.CharBuffer.wrap(java.lang.CharSequence) definition code for java.nio.CharBuffer.wrap(java.lang.CharSequence)

public static CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  wrap(CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  csq)
Wraps a string into a buffer.

The content of the new, read-only buffer will be the content of the given string. The new buffer's capacity and limit will be csq.length(), its position will be zero, and its mark will be undefined.

Parameters:
csq - The character sequence from which the new character buffer is to be created
Returns:
The new character buffer

slice sample code for java.nio.CharBuffer.slice() definition code for java.nio.CharBuffer.slice()

public abstract CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  slice()
Creates a new character buffer whose content is a shared subsequence of this buffer's content.

The content of the new buffer will start at this buffer's current position. Changes to this buffer's content will be visible in the new buffer, and vice versa; the two buffers' position, limit, and mark values will be independent.

The new buffer's position will be zero, its capacity and its limit will be the number of characters remaining in this buffer, and its mark will be undefined. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.

Returns:
The new character buffer

duplicate sample code for java.nio.CharBuffer.duplicate() definition code for java.nio.CharBuffer.duplicate()

public abstract CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  duplicate()
Creates a new character buffer that shares this buffer's content.

The content of the new buffer will be that of this buffer. Changes to this buffer's content will be visible in the new buffer, and vice versa; the two buffers' position, limit, and mark values will be independent.

The new buffer's capacity, limit, position, and mark values will be identical to those of this buffer. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.

Returns:
The new character buffer

asReadOnlyBuffer sample code for java.nio.CharBuffer.asReadOnlyBuffer() definition code for java.nio.CharBuffer.asReadOnlyBuffer()

public abstract CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  asReadOnlyBuffer()
Creates a new, read-only character buffer that shares this buffer's content.

The content of the new buffer will be that of this buffer. Changes to this buffer's content will be visible in the new buffer; the new buffer itself, however, will be read-only and will not allow the shared content to be modified. The two buffers' position, limit, and mark values will be independent.

The new buffer's capacity, limit, position, and mark values will be identical to those of this buffer.

If this buffer is itself read-only then this method behaves in exactly the same way as the duplicate sample code for java.nio.CharBuffer.duplicate() definition code for java.nio.CharBuffer.duplicate() method.

Returns:
The new, read-only character buffer

get sample code for java.nio.CharBuffer.get() definition code for java.nio.CharBuffer.get()

public abstract char get()
Relative get method. Reads the character at this buffer's current position, and then increments the position.

Returns:
The character at the buffer's current position
Throws:
BufferUnderflowException sample code for java.nio.BufferUnderflowException definition code for java.nio.BufferUnderflowException - If the buffer's current position is not smaller than its limit

put sample code for java.nio.CharBuffer.put(char) definition code for java.nio.CharBuffer.put(char)

public abstract CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  put(char c)
Relative put method  (optional operation).

Writes the given character into this buffer at the current position, and then increments the position.

Parameters:
c - The character to be written
Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If this buffer's current position is not smaller than its limit
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only

get sample code for java.nio.CharBuffer.get(int) definition code for java.nio.CharBuffer.get(int)

public abstract char get(int index)
Absolute get method. Reads the character at the given index.

Parameters:
index - The index from which the character will be read
Returns:
The character at the given index
Throws:
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If index is negative or not smaller than the buffer's limit

put sample code for java.nio.CharBuffer.put(int, char) definition code for java.nio.CharBuffer.put(int, char)

public abstract CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  put(int index,
                               char c)
Absolute put method  (optional operation).

Writes the given character into this buffer at the given index.

Parameters:
index - The index at which the character will be written
c - The character value to be written
Returns:
This buffer
Throws:
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If index is negative or not smaller than the buffer's limit
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only

get sample code for java.nio.CharBuffer.get(char[], int, int) definition code for java.nio.CharBuffer.get(char[], int, int)

public CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  get(char[] dst,
                      int offset,
                      int length)
Relative bulk get method.

This method transfers characters from this buffer into the given destination array. If there are fewer characters remaining in the buffer than are required to satisfy the request, that is, if length > remaining(), then no characters are transferred and a BufferUnderflowException sample code for java.nio.BufferUnderflowException definition code for java.nio.BufferUnderflowException is thrown.

Otherwise, this method copies length characters from this buffer into the given array, starting at the current position of this buffer and at the given offset in the array. The position of this buffer is then incremented by length.

In other words, an invocation of this method of the form src.get(dst, off, len) has exactly the same effect as the loop

     for (int i = off; i < off + len; i++)
         dst[i] = src.get(); 
except that it first checks that there are sufficient characters in this buffer and it is potentially much more efficient.

Parameters:
dst - The array into which characters are to be written
offset - The offset within the array of the first character to be written; must be non-negative and no larger than dst.length
length - The maximum number of characters to be written to the given array; must be non-negative and no larger than dst.length - offset
Returns:
This buffer
Throws:
BufferUnderflowException sample code for java.nio.BufferUnderflowException definition code for java.nio.BufferUnderflowException - If there are fewer than length characters remaining in this buffer
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If the preconditions on the offset and length parameters do not hold

get sample code for java.nio.CharBuffer.get(char[]) definition code for java.nio.CharBuffer.get(char[])

public CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  get(char[] dst)
Relative bulk get method.

This method transfers characters from this buffer into the given destination array. An invocation of this method of the form src.get(a) behaves in exactly the same way as the invocation

     src.get(a, 0, a.length) 

Returns:
This buffer
Throws:
BufferUnderflowException sample code for java.nio.BufferUnderflowException definition code for java.nio.BufferUnderflowException - If there are fewer than length characters remaining in this buffer

put sample code for java.nio.CharBuffer.put(java.nio.CharBuffer) definition code for java.nio.CharBuffer.put(java.nio.CharBuffer)

public CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  put(CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  src)
Relative bulk put method  (optional operation).

This method transfers the characters remaining in the given source buffer into this buffer. If there are more characters remaining in the source buffer than in this buffer, that is, if src.remaining() > remaining(), then no characters are transferred and a BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException is thrown.

Otherwise, this method copies n = src.remaining() characters from the given buffer into this buffer, starting at each buffer's current position. The positions of both buffers are then incremented by n.

In other words, an invocation of this method of the form dst.put(src) has exactly the same effect as the loop

     while (src.hasRemaining())
         dst.put(src.get()); 
except that it first checks that there is sufficient space in this buffer and it is potentially much more efficient.

Parameters:
src - The source buffer from which characters are to be read; must not be this buffer
Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If there is insufficient space in this buffer for the remaining characters in the source buffer
IllegalArgumentException sample code for java.lang.IllegalArgumentException definition code for java.lang.IllegalArgumentException - If the source buffer is this buffer
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only

put sample code for java.nio.CharBuffer.put(char[], int, int) definition code for java.nio.CharBuffer.put(char[], int, int)

public CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  put(char[] src,
                      int offset,
                      int length)
Relative bulk put method  (optional operation).

This method transfers characters into this buffer from the given source array. If there are more characters to be copied from the array than remain in this buffer, that is, if length > remaining(), then no characters are transferred and a BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException is thrown.

Otherwise, this method copies length characters from the given array into this buffer, starting at the given offset in the array and at the current position of this buffer. The position of this buffer is then incremented by length.

In other words, an invocation of this method of the form dst.put(src, off, len) has exactly the same effect as the loop

     for (int i = off; i < off + len; i++)
         dst.put(a[i]); 
except that it first checks that there is sufficient space in this buffer and it is potentially much more efficient.

Parameters:
src - The array from which characters are to be read
offset - The offset within the array of the first character to be read; must be non-negative and no larger than array.length
length - The number of characters to be read from the given array; must be non-negative and no larger than array.length - offset
Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If there is insufficient space in this buffer
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If the preconditions on the offset and length parameters do not hold
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only

put sample code for java.nio.CharBuffer.put(char[]) definition code for java.nio.CharBuffer.put(char[])

public final CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  put(char[] src)
Relative bulk put method  (optional operation).

This method transfers the entire content of the given source character array into this buffer. An invocation of this method of the form dst.put(a) behaves in exactly the same way as the invocation

     dst.put(a, 0, a.length) 

Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If there is insufficient space in this buffer
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only

put sample code for java.nio.CharBuffer.put(java.lang.String, int, int) definition code for java.nio.CharBuffer.put(java.lang.String, int, int)

public CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  put(String sample code for java.lang.String definition code for java.lang.String  src,
                      int start,
                      int end)
Relative bulk put method  (optional operation).

This method transfers characters from the given string into this buffer. If there are more characters to be copied from the string than remain in this buffer, that is, if end - start > remaining(), then no characters are transferred and a BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException is thrown.

Otherwise, this method copies n = end - start characters from the given string into this buffer, starting at the given start index and at the current position of this buffer. The position of this buffer is then incremented by n.

In other words, an invocation of this method of the form dst.put(src, start, end) has exactly the same effect as the loop

     for (int i = start; i < end; i++)
         dst.put(src.charAt(i)); 
except that it first checks that there is sufficient space in this buffer and it is potentially much more efficient.

Parameters:
src - The string from which characters are to be read
start - The offset within the string of the first character to be read; must be non-negative and no larger than string.length()
end - The offset within the string of the last character to be read, plus one; must be non-negative and no larger than string.length()
Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If there is insufficient space in this buffer
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If the preconditions on the start and end parameters do not hold
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only

put sample code for java.nio.CharBuffer.put(java.lang.String) definition code for java.nio.CharBuffer.put(java.lang.String)

public final CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  put(String sample code for java.lang.String definition code for java.lang.String  src)
Relative bulk put method  (optional operation).

This method transfers the entire content of the given source string into this buffer. An invocation of this method of the form dst.put(s) behaves in exactly the same way as the invocation

     dst.put(s, 0, s.length()) 

Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If there is insufficient space in this buffer
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only

hasArray sample code for java.nio.CharBuffer.hasArray() definition code for java.nio.CharBuffer.hasArray()

public final boolean hasArray()
Tells whether or not this buffer is backed by an accessible character array.

If this method returns true then the array sample code for java.nio.CharBuffer.array() definition code for java.nio.CharBuffer.array() and arrayOffset sample code for java.nio.CharBuffer.arrayOffset() definition code for java.nio.CharBuffer.arrayOffset() methods may safely be invoked.

Returns:
true if, and only if, this buffer is backed by an array and is not read-only

array sample code for java.nio.CharBuffer.array() definition code for java.nio.CharBuffer.array()

public final char[] array()
Returns the character array that backs this buffer  (optional operation).

Modifications to this buffer's content will cause the returned array's content to be modified, and vice versa.

Invoke the hasArray sample code for java.nio.CharBuffer.hasArray() definition code for java.nio.CharBuffer.hasArray() method before invoking this method in order to ensure that this buffer has an accessible backing array.

Returns:
The array that backs this buffer
Throws:
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is backed by an array but is read-only
UnsupportedOperationException sample code for java.lang.UnsupportedOperationException definition code for java.lang.UnsupportedOperationException - If this buffer is not backed by an accessible array

arrayOffset sample code for java.nio.CharBuffer.arrayOffset() definition code for java.nio.CharBuffer.arrayOffset()

public final int arrayOffset()
Returns the offset within this buffer's backing array of the first element of the buffer  (optional operation).

If this buffer is backed by an array then buffer position p corresponds to array index p + arrayOffset().

Invoke the hasArray sample code for java.nio.CharBuffer.hasArray() definition code for java.nio.CharBuffer.hasArray() method before invoking this method in order to ensure that this buffer has an accessible backing array.

Returns:
The offset within this buffer's array of the first element of the buffer
Throws:
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is backed by an array but is read-only
UnsupportedOperationException sample code for java.lang.UnsupportedOperationException definition code for java.lang.UnsupportedOperationException - If this buffer is not backed by an accessible array

compact sample code for java.nio.CharBuffer.compact() definition code for java.nio.CharBuffer.compact()

public abstract CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  compact()
Compacts this buffer  (optional operation).

The characters between the buffer's current position and its limit, if any, are copied to the beginning of the buffer. That is, the character at index p = position() is copied to index zero, the character at index p + 1 is copied to index one, and so forth until the character at index limit() - 1 is copied to index n = limit() - 1 - p. The buffer's position is then set to n+1 and its limit is set to its capacity. The mark, if defined, is discarded.

The buffer's position is set to the number of characters copied, rather than to zero, so that an invocation of this method can be followed immediately by an invocation of another relative put method.

Returns:
This buffer
Throws:
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only

isDirect sample code for java.nio.CharBuffer.isDirect() definition code for java.nio.CharBuffer.isDirect()

public abstract boolean isDirect()
Tells whether or not this character buffer is direct.

Returns:
true if, and only if, this buffer is direct

hashCode sample code for java.nio.CharBuffer.hashCode() definition code for java.nio.CharBuffer.hashCode()

public int hashCode()
Returns the current hash code of this buffer.

The hash code of a char buffer depends only upon its remaining elements; that is, upon the elements from position() up to, and including, the element at limit() - 1.

Because buffer hash codes are content-dependent, it is inadvisable to use buffers as keys in hash maps or similar data structures unless it is known that their contents will not change.

Overrides:
hashCode sample code for java.lang.Object.hashCode() definition code for java.lang.Object.hashCode() in class Object sample code for java.lang.Object definition code for java.lang.Object
Returns:
The current hash code of this buffer
See Also:
Object.equals(java.lang.Object) sample code for java.lang.Object.equals(java.lang.Object) definition code for java.lang.Object.equals(java.lang.Object) , Hashtable sample code for java.util.Hashtable definition code for java.util.Hashtable

equals sample code for java.nio.CharBuffer.equals(java.lang.Object) definition code for java.nio.CharBuffer.equals(java.lang.Object)

public boolean equals(Object sample code for java.lang.Object definition code for java.lang.Object  ob)
Tells whether or not this buffer is equal to another object.

Two char buffers are equal if, and only if,

  1. They have the same element type,

  2. They have the same number of remaining elements, and

  3. The two sequences of remaining elements, considered independently of their starting positions, are pointwise equal.

A char buffer is not equal to any other type of object.

Overrides:
equals sample code for java.lang.Object.equals(java.lang.Object) definition code for java.lang.Object.equals(java.lang.Object) in class Object sample code for java.lang.Object definition code for java.lang.Object
Parameters:
ob - The object to which this buffer is to be compared
Returns:
true if, and only if, this buffer is equal to the given object
See Also:
Object.hashCode() sample code for java.lang.Object.hashCode() definition code for java.lang.Object.hashCode() , Hashtable sample code for java.util.Hashtable definition code for java.util.Hashtable

compareTo sample code for java.nio.CharBuffer.compareTo(java.nio.CharBuffer) definition code for java.nio.CharBuffer.compareTo(java.nio.CharBuffer)

public int compareTo(CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  that)
Compares this buffer to another.

Two char buffers are compared by comparing their sequences of remaining elements lexicographically, without regard to the starting position of each sequence within its corresponding buffer.

A char buffer is not comparable to any other type of object.

Specified by:
compareTo sample code for java.lang.Comparable.compareTo(T) definition code for java.lang.Comparable.compareTo(T) in interface Comparable sample code for java.lang.Comparable definition code for java.lang.Comparable <CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer >
Parameters:
that - the Object to be compared.
Returns:
A negative integer, zero, or a positive integer as this buffer is less than, equal to, or greater than the given buffer

toString sample code for java.nio.CharBuffer.toString() definition code for java.nio.CharBuffer.toString()

public String sample code for java.lang.String definition code for java.lang.String  toString()
Returns a string containing the characters in this buffer.

The first character of the resulting string will be the character at this buffer's position, while the last character will be the character at index limit() - 1. Invoking this method does not change the buffer's position.

Specified by:
toString sample code for java.lang.CharSequence.toString() definition code for java.lang.CharSequence.toString() in interface CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence
Overrides:
toString sample code for java.lang.Object.toString() definition code for java.lang.Object.toString() in class Object sample code for java.lang.Object definition code for java.lang.Object
Returns:
The specified string

length sample code for java.nio.CharBuffer.length() definition code for java.nio.CharBuffer.length()

public final int length()
Returns the length of this character buffer.

When viewed as a character sequence, the length of a character buffer is simply the number of characters between the position (inclusive) and the limit (exclusive); that is, it is equivalent to remaining().

Specified by:
length sample code for java.lang.CharSequence.length() definition code for java.lang.CharSequence.length() in interface CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence
Returns:
The length of this character buffer

charAt sample code for java.nio.CharBuffer.charAt(int) definition code for java.nio.CharBuffer.charAt(int)

public final char charAt(int index)
Reads the character at the given index relative to the current position.

Specified by:
charAt sample code for java.lang.CharSequence.charAt(int) definition code for java.lang.CharSequence.charAt(int) in interface CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence
Parameters:
index - The index of the character to be read, relative to the position; must be non-negative and smaller than remaining()
Returns:
The character at index position() + index
Throws:
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If the preconditions on index do not hold

subSequence sample code for java.nio.CharBuffer.subSequence(int, int) definition code for java.nio.CharBuffer.subSequence(int, int)

public abstract CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  subSequence(int start,
                                         int end)
Creates a new character buffer that represents the specified subsequence of this buffer, relative to the current position.

The new buffer will share this buffer's content; that is, if the content of this buffer is mutable then modifications to one buffer will cause the other to be modified. The new buffer's capacity will be that of this buffer, its position will be position() + start, and its limit will be position() + end. The new buffer will be direct if, and only if, this buffer is direct, and it will be read-only if, and only if, this buffer is read-only.

Specified by:
subSequence sample code for java.lang.CharSequence.subSequence(int, int) definition code for java.lang.CharSequence.subSequence(int, int) in interface CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence
Parameters:
start - The index, relative to the current position, of the first character in the subsequence; must be non-negative and no larger than remaining()
end - The index, relative to the current position, of the character following the last character in the subsequence; must be no smaller than start and no larger than remaining()
Returns:
The new character buffer
Throws:
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If the preconditions on start and end do not hold

append sample code for java.nio.CharBuffer.append(java.lang.CharSequence) definition code for java.nio.CharBuffer.append(java.lang.CharSequence)

public CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  append(CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  csq)
Appends the specified character sequence to this buffer  (optional operation).

An invocation of this method of the form dst.append(csq) behaves in exactly the same way as the invocation

     dst.put(csq.toString()) 

Depending on the specification of toString for the character sequence csq, the entire sequence may not be appended. For instance, invoking the toString sample code for java.nio.CharBuffer.toString() definition code for java.nio.CharBuffer.toString() method of a character buffer will return a subsequence whose content depends upon the buffer's position and limit.

Specified by:
append sample code for java.lang.Appendable.append(java.lang.CharSequence) definition code for java.lang.Appendable.append(java.lang.CharSequence) in interface Appendable sample code for java.lang.Appendable definition code for java.lang.Appendable
Parameters:
csq - The character sequence to append. If csq is null, then the four characters "null" are appended to this character buffer.
Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If there is insufficient space in this buffer
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only
Since:
1.5

append sample code for java.nio.CharBuffer.append(java.lang.CharSequence, int, int) definition code for java.nio.CharBuffer.append(java.lang.CharSequence, int, int)

public CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  append(CharSequence sample code for java.lang.CharSequence definition code for java.lang.CharSequence  csq,
                         int start,
                         int end)
Appends a subsequence of the specified character sequence to this buffer  (optional operation).

An invocation of this method of the form dst.append(csq, start, end) when csq is not null, behaves in exactly the same way as the invocation

     dst.put(csq.subSequence(start, end).toString()) 

Specified by:
append sample code for java.lang.Appendable.append(java.lang.CharSequence, int, int) definition code for java.lang.Appendable.append(java.lang.CharSequence, int, int) in interface Appendable sample code for java.lang.Appendable definition code for java.lang.Appendable
Parameters:
csq - The character sequence from which a subsequence will be appended. If csq is null, then characters will be appended as if csq contained the four characters "null".
start - The index of the first character in the subsequence
end - The index of the character following the last character in the subsequence
Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If there is insufficient space in this buffer
IndexOutOfBoundsException sample code for java.lang.IndexOutOfBoundsException definition code for java.lang.IndexOutOfBoundsException - If start or end are negative, start is greater than end, or end is greater than csq.length()
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only
Since:
1.5

append sample code for java.nio.CharBuffer.append(char) definition code for java.nio.CharBuffer.append(char)

public CharBuffer sample code for java.nio.CharBuffer definition code for java.nio.CharBuffer  append(char c)
Appends the specified character to this buffer  (optional operation).

An invocation of this method of the form dst.append(c) behaves in exactly the same way as the invocation

     dst.put(c) 

Specified by:
append sample code for java.lang.Appendable.append(char) definition code for java.lang.Appendable.append(char) in interface Appendable sample code for java.lang.Appendable definition code for java.lang.Appendable
Parameters:
c - The 16-bit character to append
Returns:
This buffer
Throws:
BufferOverflowException sample code for java.nio.BufferOverflowException definition code for java.nio.BufferOverflowException - If there is insufficient space in this buffer
ReadOnlyBufferException sample code for java.nio.ReadOnlyBufferException definition code for java.nio.ReadOnlyBufferException - If this buffer is read-only
Since:
1.5

order sample code for java.nio.CharBuffer.order() definition code for java.nio.CharBuffer.order()

public abstract ByteOrder sample code for java.nio.ByteOrder definition code for java.nio.ByteOrder  order()
Retrieves this buffer's byte order.

The byte order of a character buffer created by allocation or by wrapping an existing char array is the native order sample code for java.nio.ByteOrder.nativeOrder() definition code for java.nio.ByteOrder.nativeOrder() of the underlying hardware. The byte order of a character buffer created as a view of a byte buffer is that of the byte buffer at the moment that the view is created.

Returns:
This buffer's byte order