Class java.lang.Byte - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Class java.lang.Byte

java.lang.Object
   |
   +----java.lang.Number
           |
           +----java.lang.Byte

public final class Byte
extends Number

The Byte class is the standard wrapper for byte values.

See Also:: Number

MAX_VALUE: The maximum value a Byte can have.
MIN_VALUE: The minimum value a Byte can have.
TYPE: The Class object representing the primitive type byte.

Byte(byte): Constructs a Byte object initialized to the specified byte value.
Byte(String): Constructs a Byte object initialized to the value specified by the String parameter.

byteValue(): Returns the value of this Byte as a byte.
decode(String): Decodes a String into a Byte.
doubleValue(): Returns the value of this Byte as a double.
equals(Object): Compares this object to the specified object.
floatValue(): Returns the value of this Byte as a float.
hashCode(): Returns a hashcode for this Byte.
intValue(): Returns the value of this Byte as an int.
longValue(): Returns the value of this Byte as a long.
parseByte(String): Assuming the specified String represents a byte, returns that byte's value.
parseByte(String, int): Assuming the specified String represents a byte, returns that byte's value.
shortValue(): Returns the value of this Byte as a short.
toString(): Returns a String object representing this Byte's value.
toString(byte): Returns a new String object representing the specified Byte.
valueOf(String): Assuming the specified String represents a byte, returns a new Byte object initialized to that value.
valueOf(String, int): Assuming the specified String represents a byte, returns a new Byte object initialized to that value.

MIN_VALUE

 public static final byte MIN_VALUE

The minimum value a Byte can have.

MAX_VALUE

 public static final byte MAX_VALUE

The maximum value a Byte can have.

TYPE

 public static final Class TYPE

The Class object representing the primitive type byte.

Byte

 public Byte(byte value)

Constructs a Byte object initialized to the specified byte value.

Parameters:: value - the initial value of the Byte

Byte

 public Byte(String s) throws NumberFormatException

Constructs a Byte object initialized to the value specified by the String parameter. The radix is assumed to be 10.

Parameters:: s - the String to be converted to a Byte
Throws: NumberFormatException: If the String does not contain a parsable byte.

toString

 public static 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

parseByte

 public static byte parseByte(String s) throws NumberFormatException

Assuming the specified String represents a byte, returns that byte's value. Throws an exception if the String cannot be parsed as a byte. The radix is assumed to be 10.

Parameters:: s - the String containing the byte
Throws: NumberFormatException: If the string does not contain a parsable byte.

parseByte

 public static byte parseByte(String s,
                              int radix) throws NumberFormatException

Assuming the specified String represents a byte, returns that byte's value. Throws an exception if the String cannot be parsed as a byte.

Parameters:: s - the String containing the byte; radix - the radix to be used
Throws: NumberFormatException: If the String does not contain a parsable byte.

valueOf

 public static Byte valueOf(String s,
                            int radix) throws NumberFormatException

Assuming the specified String represents a byte, returns a new Byte object initialized to that value. Throws an exception if the String cannot be parsed as a byte.

Parameters:: s - the String containing the integer; radix - the radix to be used
Throws: NumberFormatException: If the String does not contain a parsable byte.

valueOf

 public static Byte valueOf(String s) throws NumberFormatException

Assuming the specified String represents a byte, returns a new Byte object initialized to that value. Throws an exception if the String cannot be parsed as a byte. The radix is assumed to be 10.

Parameters:: s - the String containing the integer
Throws: NumberFormatException: If the String does not contain a parsable byte.

decode

 public static Byte decode(String nm) throws NumberFormatException

Decodes a String into a Byte. The String may represent decimal, hexadecimal, and octal numbers.

Parameters:: nm - the string to decode

byteValue

 public byte byteValue()

Returns the value of this Byte as a byte.

Overrides:: byteValue in class Number

shortValue

 public short shortValue()

Returns the value of this Byte as a short.

Overrides:: shortValue in class Number

intValue

 public int intValue()

Returns the value of this Byte as an int.

Overrides:: intValue in class Number

longValue

 public long longValue()

Returns the value of this Byte as a long.

Overrides:: longValue in class Number

floatValue

 public float floatValue()

Returns the value of this Byte as a float.

Overrides:: floatValue in class Number

doubleValue

 public double doubleValue()

Returns the value of this Byte as a double.

Overrides:: doubleValue in class Number

toString

 public String toString()

Returns a String object representing this Byte's value.

Overrides:: toString in class Object

hashCode

 public int hashCode()

Returns a hashcode for this Byte.

Overrides:: hashCode in class Object

equals

 public boolean equals(Object obj)

Compares this object to the specified object.

Parameters:: obj - the object to compare with
Returns:: true if the objects are the same; false otherwise.
Overrides:: equals in class Object

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