Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class Byte - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.lang
Class Byte

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

public final class Byte
extends Number
implements Comparable

The Byte class is the standard wrapper for byte values.

Since:: JDK1.1
See Also:: Number, Serialized Form

Field Summary

static byte MAX_VALUE
          The maximum value a Byte can have.

static byte MIN_VALUE
          The minimum value a Byte can have.

static Class TYPE
          The Class object representing the primitive type byte.

Constructor Summary

Byte(byte value)
          Constructs a Byte object initialized to the specified byte value.

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

Method Summary

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

int compareTo(Byte anotherByte)
          Compares two Bytes numerically.

int compareTo(Object o)
          Compares this Byte to another Object.

static Byte decode(String nm)
          Decodes a String into a Byte.

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

boolean equals(Object obj)
          Compares this object to the specified object.

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

int hashCode()
          Returns a hashcode for this Byte.

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

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

static byte parseByte(String s)
          Assuming the specified String represents a byte, returns that byte's value.

static byte parseByte(String s, int radix)
          Assuming the specified String represents a byte, returns that byte's value.

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

String toString()
          Returns a String object representing this Byte's value.

static String toString(byte b)
          Returns a new String object representing the specified Byte.

static Byte valueOf(String s)
          Assuming the specified String represents a byte, returns a new Byte object initialized to that value.

static Byte valueOf(String s, int radix)
          Assuming the specified String represents a byte, returns a new Byte object initialized to that value.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

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.

Constructor Detail

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.

Method Detail

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