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Chapter 25 The java.lang Package |
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Chapter 25 The java.lang Package |
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This class provides an object wrapper around the byte primitive type. It defines useful constants for the minimum and maximum values that can be stored by the byte type, and also a Class object constant that represents the byte type. It also provides various methods for converting Byte values to and from strings and other numeric types.
Most of the static methods of this class are used to convert a String to a Byte object or a byte value: the four parseByte() and valueOf() methods parse a number from the specified string, using an optionally specified radix, and return it in one of these two forms. The decode() method parses a byte specified in base 10, base 8, or base 16 and returns it as a Byte. If the string begins with "0x" or "#", it is interpreted as a hexadecimal number. If it begins with "0", it is interpreted as an octal number. Otherwise, it is interpreted as a decimal number.
Note that this class has two different toString() methods. One is static and converts a byte primitive value to a String. The other is the usual toString() method that converts a Byte object to a string. Most of the remaining methods convert a Byte to various primitive numeric types.
public final class Byte extends Number {
// Public Constructors
public Byte(byte value);
public Byte(String s) throws NumberFormatException;
// Constants
public static final byte MAX_VALUE;
public static final byte MIN_VALUE;
public static final Class TYPE;
// Class Methods
public static Byte decode(String nm) throws NumberFormatException;
public static byte parseByte(String s) throws NumberFormatException;
public static byte parseByte(String s, int radix) throws NumberFormatException;
public static String toString(byte b);
public static Byte valueOf(String s, int radix) throws NumberFormatException;
public static Byte valueOf(String s) throws NumberFormatException;
// Public Instance Methods
public byte byteValue(); // Overrides Number
public double doubleValue(); // Defines Number
public boolean equals(Object obj); // Overrides Object
public float floatValue(); // Defines Number
public int hashCode(); // Overrides Object
public int intValue(); // Defines Number
public long longValue(); // Defines Number
public short shortValue(); // Overrides Number
public String toString(); // Overrides Object
}
Object->Number(Serializable)->Byte
Byte.decode(), Byte.valueOf()
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| java.lang.Boolean (JDK 1.0) |  |
java.lang.Character (JDK 1.0) |
