java.lang
Class Byte

java.lang.Object sample code for java.lang.Object definition code for java.lang.Object 
  extended by java.lang.Number sample code for java.lang.Number definition code for java.lang.Number 
      extended by java.lang.Byte
All Implemented Interfaces:
Serializable sample code for java.io.Serializable definition code for java.io.Serializable , Comparable sample code for java.lang.Comparable definition code for java.lang.Comparable <Byte sample code for java.lang.Byte definition code for java.lang.Byte >

public final class Byte
extends Number sample code for java.lang.Number definition code for java.lang.Number
implements Comparable sample code for java.lang.Comparable definition code for java.lang.Comparable <Byte sample code for java.lang.Byte definition code for java.lang.Byte >

The Byte class wraps a value of primitive type byte in an object. An object of type Byte contains a single field whose type is byte.

In addition, this class provides several methods for converting a byte to a String and a String to a byte, as well as other constants and methods useful when dealing with a byte.

Since:
JDK1.1
See Also:
Number sample code for java.lang.Number definition code for java.lang.Number , Serialized Form

Field Summary
static byte MAX_VALUE sample code for java.lang.Byte.MAX_VALUE definition code for java.lang.Byte.MAX_VALUE
          A constant holding the maximum value a byte can have, 27-1.
static byte MIN_VALUE sample code for java.lang.Byte.MIN_VALUE definition code for java.lang.Byte.MIN_VALUE
          A constant holding the minimum value a byte can have, -27.
static int SIZE sample code for java.lang.Byte.SIZE definition code for java.lang.Byte.SIZE
          The number of bits used to represent a byte value in two's complement binary form.
static Class sample code for java.lang.Class definition code for java.lang.Class <Byte sample code for java.lang.Byte definition code for java.lang.Byte > TYPE sample code for java.lang.Byte.TYPE definition code for java.lang.Byte.TYPE
          The Class instance representing the primitive type byte.
 
Constructor Summary
Byte sample code for java.lang.Byte.Byte(byte) definition code for java.lang.Byte.Byte(byte) (byte value)
          Constructs a newly allocated Byte object that represents the specified byte value.
Byte sample code for java.lang.Byte.Byte(java.lang.String) definition code for java.lang.Byte.Byte(java.lang.String) (String sample code for java.lang.String definition code for java.lang.String  s)
          Constructs a newly allocated Byte object that represents the byte value indicated by the String parameter.
 
Method Summary
 byte byteValue sample code for java.lang.Byte.byteValue() definition code for java.lang.Byte.byteValue() ()
          Returns the value of this Byte as a byte.
 int compareTo sample code for java.lang.Byte.compareTo(java.lang.Byte) definition code for java.lang.Byte.compareTo(java.lang.Byte) (Byte sample code for java.lang.Byte definition code for java.lang.Byte  anotherByte)
          Compares two Byte objects numerically.
static Byte sample code for java.lang.Byte definition code for java.lang.Byte decode sample code for java.lang.Byte.decode(java.lang.String) definition code for java.lang.Byte.decode(java.lang.String) (String sample code for java.lang.String definition code for java.lang.String  nm)
          Decodes a String into a Byte.
 double doubleValue sample code for java.lang.Byte.doubleValue() definition code for java.lang.Byte.doubleValue() ()
          Returns the value of this Byte as a double.
 boolean equals sample code for java.lang.Byte.equals(java.lang.Object) definition code for java.lang.Byte.equals(java.lang.Object) (Object sample code for java.lang.Object definition code for java.lang.Object  obj)
          Compares this object to the specified object.
 float floatValue sample code for java.lang.Byte.floatValue() definition code for java.lang.Byte.floatValue() ()
          Returns the value of this Byte as a float.
 int hashCode sample code for java.lang.Byte.hashCode() definition code for java.lang.Byte.hashCode() ()
          Returns a hash code for this Byte.
 int intValue sample code for java.lang.Byte.intValue() definition code for java.lang.Byte.intValue() ()
          Returns the value of this Byte as an int.
 long longValue sample code for java.lang.Byte.longValue() definition code for java.lang.Byte.longValue() ()
          Returns the value of this Byte as a long.
static byte parseByte sample code for java.lang.Byte.parseByte(java.lang.String) definition code for java.lang.Byte.parseByte(java.lang.String) (String sample code for java.lang.String definition code for java.lang.String  s)
          Parses the string argument as a signed decimal byte.
static byte parseByte sample code for java.lang.Byte.parseByte(java.lang.String, int) definition code for java.lang.Byte.parseByte(java.lang.String, int) (String sample code for java.lang.String definition code for java.lang.String  s, int radix)
          Parses the string argument as a signed byte in the radix specified by the second argument.
 short shortValue sample code for java.lang.Byte.shortValue() definition code for java.lang.Byte.shortValue() ()
          Returns the value of this Byte as a short.
 String sample code for java.lang.String definition code for java.lang.String toString sample code for java.lang.Byte.toString() definition code for java.lang.Byte.toString() ()
          Returns a String object representing this Byte's value.
static String sample code for java.lang.String definition code for java.lang.String toString sample code for java.lang.Byte.toString(byte) definition code for java.lang.Byte.toString(byte) (byte b)
          Returns a new String object representing the specified byte.
static Byte sample code for java.lang.Byte definition code for java.lang.Byte valueOf sample code for java.lang.Byte.valueOf(byte) definition code for java.lang.Byte.valueOf(byte) (byte b)
          Returns a Byte instance representing the specified byte value.
static Byte sample code for java.lang.Byte definition code for java.lang.Byte valueOf sample code for java.lang.Byte.valueOf(java.lang.String) definition code for java.lang.Byte.valueOf(java.lang.String) (String sample code for java.lang.String definition code for java.lang.String  s)
          Returns a Byte object holding the value given by the specified String.
static Byte sample code for java.lang.Byte definition code for java.lang.Byte valueOf sample code for java.lang.Byte.valueOf(java.lang.String, int) definition code for java.lang.Byte.valueOf(java.lang.String, int) (String sample code for java.lang.String definition code for java.lang.String  s, int radix)
          Returns a Byte object holding the value extracted from the specified String when parsed with the radix given by the second argument.
 
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)
 

Field Detail

MIN_VALUE sample code for java.lang.Byte.MIN_VALUE

public static final byte MIN_VALUE
A constant holding the minimum value a byte can have, -27.

See Also:
Constant Field Values

MAX_VALUE sample code for java.lang.Byte.MAX_VALUE

public static final byte MAX_VALUE
A constant holding the maximum value a byte can have, 27-1.

See Also:
Constant Field Values

TYPE sample code for java.lang.Byte.TYPE

public static final Class sample code for java.lang.Class definition code for java.lang.Class <Byte sample code for java.lang.Byte definition code for java.lang.Byte > TYPE
The Class instance representing the primitive type byte.


SIZE sample code for java.lang.Byte.SIZE

public static final int SIZE
The number of bits used to represent a byte value in two's complement binary form.

Since:
1.5
See Also:
Constant Field Values
Constructor Detail

Byte sample code for java.lang.Byte(byte) definition code for java.lang.Byte(byte)

public Byte(byte value)
Constructs a newly allocated Byte object that represents the specified byte value.

Parameters:
value - the value to be represented by the Byte.

Byte sample code for java.lang.Byte(java.lang.String) definition code for java.lang.Byte(java.lang.String)

public Byte(String sample code for java.lang.String definition code for java.lang.String  s)
     throws NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException 
Constructs a newly allocated Byte object that represents the byte value indicated by the String parameter. The string is converted to a byte value in exactly the manner used by the parseByte method for radix 10.

Parameters:
s - the String to be converted to a Byte
Throws:
NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException - If the String does not contain a parsable byte.
See Also:
parseByte(java.lang.String, int) sample code for java.lang.Byte.parseByte(java.lang.String, int) definition code for java.lang.Byte.parseByte(java.lang.String, int)
Method Detail

toString sample code for java.lang.Byte.toString(byte) definition code for java.lang.Byte.toString(byte)

public static String sample code for java.lang.String definition code for java.lang.String  toString(byte b)
Returns a new String object representing the specified byte. The radix is assumed to be 10.

Parameters:
b - the byte to be converted
Returns:
the string representation of the specified byte
See Also:
Integer.toString(int) sample code for java.lang.Integer.toString(int) definition code for java.lang.Integer.toString(int)

valueOf sample code for java.lang.Byte.valueOf(byte) definition code for java.lang.Byte.valueOf(byte)

public static Byte sample code for java.lang.Byte definition code for java.lang.Byte  valueOf(byte b)
Returns a Byte instance representing the specified byte value. If a new Byte instance is not required, this method should generally be used in preference to the constructor Byte(byte) sample code for java.lang.Byte.Byte(byte) definition code for java.lang.Byte.Byte(byte) , as this method is likely to yield significantly better space and time performance by caching frequently requested values.

Parameters:
b - a byte value.
Returns:
a Byte instance representing b.
Since:
1.5

parseByte sample code for java.lang.Byte.parseByte(java.lang.String) definition code for java.lang.Byte.parseByte(java.lang.String)

public static byte parseByte(String sample code for java.lang.String definition code for java.lang.String  s)
                      throws NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException 
Parses the string argument as a signed decimal byte. The characters in the string must all be decimal digits, except that the first character may be an ASCII minus sign '-' ('\u002D') to indicate a negative value. The resulting byte value is returned, exactly as if the argument and the radix 10 were given as arguments to the parseByte(java.lang.String, int) sample code for java.lang.Byte.parseByte(java.lang.String, int) definition code for java.lang.Byte.parseByte(java.lang.String, int) method.

Parameters:
s - a String containing the byte representation to be parsed
Returns:
the byte value represented by the argument in decimal
Throws:
NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException - if the string does not contain a parsable byte.

parseByte sample code for java.lang.Byte.parseByte(java.lang.String, int) definition code for java.lang.Byte.parseByte(java.lang.String, int)

public static byte parseByte(String sample code for java.lang.String definition code for java.lang.String  s,
                             int radix)
                      throws NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException 
Parses the string argument as a signed byte in the radix specified by the second argument. The characters in the string must all be digits, of the specified radix (as determined by whether Character.digit(char, int) sample code for java.lang.Character.digit(char, int) definition code for java.lang.Character.digit(char, int) returns a nonnegative value) except that the first character may be an ASCII minus sign '-' ('\u002D') to indicate a negative value. The resulting byte value is returned.

An exception of type NumberFormatException is thrown if any of the following situations occurs:

Parameters:
s - the String containing the byte representation to be parsed
radix - the radix to be used while parsing s
Returns:
the byte value represented by the string argument in the specified radix
Throws:
NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException - If the string does not contain a parsable byte.

valueOf sample code for java.lang.Byte.valueOf(java.lang.String, int) definition code for java.lang.Byte.valueOf(java.lang.String, int)

public static Byte sample code for java.lang.Byte definition code for java.lang.Byte  valueOf(String sample code for java.lang.String definition code for java.lang.String  s,
                           int radix)
                    throws NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException 
Returns a Byte object holding the value extracted from the specified String when parsed with the radix given by the second argument. The first argument is interpreted as representing a signed byte in the radix specified by the second argument, exactly as if the argument were given to the parseByte(java.lang.String, int) sample code for java.lang.Byte.parseByte(java.lang.String, int) definition code for java.lang.Byte.parseByte(java.lang.String, int) method. The result is a Byte object that represents the byte value specified by the string.

In other words, this method returns a Byte object equal to the value of:

new Byte(Byte.parseByte(s, radix))

Parameters:
s - the string to be parsed
radix - the radix to be used in interpreting s
Returns:
a Byte object holding the value represented by the string argument in the specified radix.
Throws:
NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException - If the String does not contain a parsable byte.

valueOf sample code for java.lang.Byte.valueOf(java.lang.String) definition code for java.lang.Byte.valueOf(java.lang.String)

public static Byte sample code for java.lang.Byte definition code for java.lang.Byte  valueOf(String sample code for java.lang.String definition code for java.lang.String  s)
                    throws NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException 
Returns a Byte object holding the value given by the specified String. The argument is interpreted as representing a signed decimal byte, exactly as if the argument were given to the parseByte(java.lang.String) sample code for java.lang.Byte.parseByte(java.lang.String) definition code for java.lang.Byte.parseByte(java.lang.String) method. The result is a Byte object that represents the byte value specified by the string.

In other words, this method returns a Byte object equal to the value of:

new Byte(Byte.parseByte(s))

Parameters:
s - the string to be parsed
Returns:
a Byte object holding the value represented by the string argument
Throws:
NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException - If the String does not contain a parsable byte.

decode sample code for java.lang.Byte.decode(java.lang.String) definition code for java.lang.Byte.decode(java.lang.String)

public static Byte sample code for java.lang.Byte definition code for java.lang.Byte  decode(String sample code for java.lang.String definition code for java.lang.String  nm)
                   throws NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException 
Decodes a String into a Byte. Accepts decimal, hexadecimal, and octal numbers given by the following grammar:
DecodableString:
Signopt DecimalNumeral
Signopt 0x HexDigits
Signopt 0X HexDigits
Signopt # HexDigits
Signopt 0 OctalDigits

Sign:
-
DecimalNumeral, HexDigits, and OctalDigits are defined in §3.10.1 of the Java Language Specification.

The sequence of characters following an (optional) negative sign and/or radix specifier ("0x", "0X", "#", or leading zero) is parsed as by the Byte.parseByte method with the indicated radix (10, 16, or 8). This sequence of characters must represent a positive value or a NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException will be thrown. The result is negated if first character of the specified String is the minus sign. No whitespace characters are permitted in the String.

Parameters:
nm - the String to decode.
Returns:
a Byte object holding the byte value represented by nm
Throws:
NumberFormatException sample code for java.lang.NumberFormatException definition code for java.lang.NumberFormatException - if the String does not contain a parsable byte.
See Also:
parseByte(java.lang.String, int) sample code for java.lang.Byte.parseByte(java.lang.String, int) definition code for java.lang.Byte.parseByte(java.lang.String, int)

byteValue sample code for java.lang.Byte.byteValue() definition code for java.lang.Byte.byteValue()

public byte byteValue()
Returns the value of this Byte as a byte.

Overrides:
byteValue sample code for java.lang.Number.byteValue() definition code for java.lang.Number.byteValue() in class Number sample code for java.lang.Number definition code for java.lang.Number
Returns:
the numeric value represented by this object after conversion to type byte.

shortValue sample code for java.lang.Byte.shortValue() definition code for java.lang.Byte.shortValue()

public short shortValue()
Returns the value of this Byte as a short.

Overrides:
shortValue sample code for java.lang.Number.shortValue() definition code for java.lang.Number.shortValue() in class Number sample code for java.lang.Number definition code for java.lang.Number
Returns:
the numeric value represented by this object after conversion to type short.

intValue sample code for java.lang.Byte.intValue() definition code for java.lang.Byte.intValue()

public int intValue()
Returns the value of this Byte as an int.

Specified by:
intValue sample code for java.lang.Number.intValue() definition code for java.lang.Number.intValue() in class Number sample code for java.lang.Number definition code for java.lang.Number
Returns:
the numeric value represented by this object after conversion to type int.

longValue sample code for java.lang.Byte.longValue() definition code for java.lang.Byte.longValue()

public long longValue()
Returns the value of this Byte as a long.

Specified by:
longValue sample code for java.lang.Number.longValue() definition code for java.lang.Number.longValue() in class Number sample code for java.lang.Number definition code for java.lang.Number
Returns:
the numeric value represented by this object after conversion to type long.

floatValue sample code for java.lang.Byte.floatValue() definition code for java.lang.Byte.floatValue()

public float floatValue()
Returns the value of this Byte as a float.

Specified by:
floatValue sample code for java.lang.Number.floatValue() definition code for java.lang.Number.floatValue() in class Number sample code for java.lang.Number definition code for java.lang.Number
Returns:
the numeric value represented by this object after conversion to type float.

doubleValue sample code for java.lang.Byte.doubleValue() definition code for java.lang.Byte.doubleValue()

public double doubleValue()
Returns the value of this Byte as a double.

Specified by:
doubleValue sample code for java.lang.Number.doubleValue() definition code for java.lang.Number.doubleValue() in class Number sample code for java.lang.Number definition code for java.lang.Number
Returns:
the numeric value represented by this object after conversion to type double.

toString sample code for java.lang.Byte.toString() definition code for java.lang.Byte.toString()

public String sample code for java.lang.String definition code for java.lang.String  toString()
Returns a String object representing this Byte's value. The value is converted to signed decimal representation and returned as a string, exactly as if the byte value were given as an argument to the toString(byte) sample code for java.lang.Byte.toString(byte) definition code for java.lang.Byte.toString(byte) method.

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:
a string representation of the value of this object in base 10.

hashCode sample code for java.lang.Byte.hashCode() definition code for java.lang.Byte.hashCode()

public int hashCode()
Returns a hash code for this Byte.

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:
a hash code value for this object.
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.lang.Byte.equals(java.lang.Object) definition code for java.lang.Byte.equals(java.lang.Object)

public boolean equals(Object sample code for java.lang.Object definition code for java.lang.Object  obj)
Compares this object to the specified object. The result is true if and only if the argument is not null and is a Byte object that contains the same byte value as this 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:
obj - the object to compare with
Returns:
true if the objects are the same; false otherwise.
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.lang.Byte.compareTo(java.lang.Byte) definition code for java.lang.Byte.compareTo(java.lang.Byte)

public int compareTo(Byte sample code for java.lang.Byte definition code for java.lang.Byte  anotherByte)
Compares two Byte objects numerically.

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 <Byte sample code for java.lang.Byte definition code for java.lang.Byte >
Parameters:
anotherByte - the Byte to be compared.
Returns:
the value 0 if this Byte is equal to the argument Byte; a value less than 0 if this Byte is numerically less than the argument Byte; and a value greater than 0 if this Byte is numerically greater than the argument Byte (signed comparison).
Since:
1.2