IT. Expert System.

All Implemented Interfaces:

Serializable, Comparable<Byte>

public final class Byte
extends Number
implements Comparable<Byte>

Since:

1.1

See Also:

Serialized Form

• Field Summary

  Fields

  Modifier and Type	Field and Description
  static byte	MAX_VALUE The maximum Byte value, 27-1.
  static byte	MIN_VALUE The minimum Byte value, -27.
  static int	SIZE The number of bits needed to represent a Byte value in two's complement form.
  static Class<Byte>	TYPE The Class object that represents the primitive type byte.

• Constructor Summary

  Constructors

  Constructor and Description
  Byte(byte value) Constructs a new Byte with the specified primitive byte value.
  Byte(String string) Constructs a new Byte from the specified string.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  byte	byteValue() Gets the primitive value of this byte.
  static int	compare(byte lhs, byte rhs) Compares two byte values.
  int	compareTo(Byte object) Compares this object to the specified byte object to determine their relative order.
  static Byte	decode(String string) Parses the specified string and returns a Byte instance if the string can be decoded into a single byte value.
  double	doubleValue() Returns this object's value as a double.
  boolean	equals(Object object) Compares this object with the specified object and indicates if they are equal.
  float	floatValue() Returns this object's value as a float.
  int	hashCode() Returns an integer hash code for this object.
  int	intValue() Returns this object's value as an int.
  long	longValue() Returns this object's value as a long.
  static byte	parseByte(String string) Parses the specified string as a signed decimal byte value.
  static byte	parseByte(String string, int radix) Parses the specified string as a signed byte value using the specified radix.
  short	shortValue() Returns this object's value as a short.
  static String	toHexString(byte b, boolean upperCase) Returns a two-digit hex string.
  String	toString() Returns a string containing a concise, human-readable description of this object.
  static String	toString(byte value) Returns a string containing a concise, human-readable description of the specified byte value.
  static Byte	valueOf(byte b) Returns a Byte instance for the specified byte value.
  static Byte	valueOf(String string) Parses the specified string as a signed decimal byte value.
  static Byte	valueOf(String string, int radix) Parses the specified string as a signed byte value using the specified radix.

  • Methods inherited from class java.lang.Object

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

• Field Detail

  • MAX_VALUE

    public static final byte MAX_VALUE

    The maximum Byte value, 2⁷-1.

    See Also:

    Constant Field Values

  • MIN_VALUE

    public static final byte MIN_VALUE

    The minimum Byte value, -2⁷.

    See Also:

    Constant Field Values

  • SIZE

    public static final int SIZE

    The number of bits needed to represent a Byte value in two's complement form.

    Since:

    1.5

    See Also:

    Constant Field Values

  • TYPE

    public static final Class<Byte> TYPE

    The Class object that represents the primitive type byte.

• Constructor Detail

  • Byte

    public Byte(byte value)

    Constructs a new Byte with the specified primitive byte value.

    Parameters:

    value - the primitive byte value to store in the new instance.

  • Byte

    public Byte(String string)
         throws NumberFormatException

    Constructs a new Byte from the specified string.

    Parameters:

    string - the string representation of a single byte value.

    Throws:

    NumberFormatException - if string cannot be parsed as a byte value.

    See Also:

    parseByte(String)

• Method Detail

  • byteValue

    public byte byteValue()

    Gets the primitive value of this byte.

    Overrides:

    byteValue in class Number

    Returns:

    this object's primitive value.

  • compareTo

    public int compareTo(Byte object)

    Compares this object to the specified byte object to determine their relative order.

    Specified by:

    compareTo in interface Comparable<Byte>

    Parameters:

    object - the byte object to compare this object to.

    Returns:

    a negative value if the value of this byte is less than the value of object; 0 if the value of this byte and the value of object are equal; a positive value if the value of this byte is greater than the value of object.

    Since:

    1.2

    See Also:

    Comparable

  • compare

    public static int compare(byte lhs,
              byte rhs)

    Compares two byte values.

    Returns:

    0 if lhs = rhs, less than 0 if lhs < rhs, and greater than 0 if lhs > rhs.

    Since:

    1.7

  • decode

    public static Byte decode(String string)
                       throws NumberFormatException

    Parses the specified string and returns a Byte instance if the string can be decoded into a single byte value. The string may be an optional minus sign "-" followed by a hexadecimal ("0x..." or "#..."), octal ("0..."), or decimal ("...") representation of a byte.

    Parameters:

    string - a string representation of a single byte value.

    Returns:

    a Byte containing the value represented by string.

    Throws:

    NumberFormatException - if string cannot be parsed as a byte value.

  • doubleValue

    public double doubleValue()

    Description copied from class: Number
    Returns this object's value as a double. Might involve rounding.

    Specified by:

    doubleValue in class Number

    Returns:

    the primitive double value of this object.

  • equals

    public boolean equals(Object object)

    Compares this object with the specified object and indicates if they are equal. In order to be equal, object must be an instance of Byte and have the same byte value as this object.

    Overrides:

    equals in class Object

    Parameters:

    object - the object to compare this byte with.

    Returns:

    true if the specified object is equal to this Byte; false otherwise.

    See Also:

    Object.hashCode()

  • floatValue

    public float floatValue()

    Description copied from class: Number
    Returns this object's value as a float. Might involve rounding.

    Specified by:

    floatValue in class Number

    Returns:

    the primitive float value of this object.

  • hashCode

    public int hashCode()

    Description copied from class: Object
    Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.

    Note that hash values must not change over time unless information used in equals comparisons also changes.

    See Writing a correct hashCode method if you intend implementing your own hashCode method.

    Overrides:

    hashCode in class Object

    Returns:

    this object's hash code.

    See Also:

    Object.equals(java.lang.Object)

  • intValue

    public int intValue()

    Description copied from class: Number
    Returns this object's value as an int. Might involve rounding and/or truncating the value, so it fits into an int.

    Specified by:

    intValue in class Number

    Returns:

    the primitive int value of this object.

  • longValue

    public long longValue()

    Description copied from class: Number
    Returns this object's value as a long. Might involve rounding and/or truncating the value, so it fits into a long.

    Specified by:

    longValue in class Number

    Returns:

    the primitive long value of this object.

  • parseByte

    public static byte parseByte(String string)
                          throws NumberFormatException

    Parses the specified string as a signed decimal byte value. The ASCII character - ('-') is recognized as the minus sign.

    Parameters:

    string - the string representation of a single byte value.

    Returns:

    the primitive byte value represented by string.

    Throws:

    NumberFormatException - if string can not be parsed as a byte value.

  • parseByte

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

    Parses the specified string as a signed byte value using the specified radix. The ASCII character - ('-') is recognized as the minus sign.

    Parameters:

    string - the string representation of a single byte value.

    radix - the radix to use when parsing.

    Returns:

    the primitive byte value represented by string using radix.

    Throws:

    NumberFormatException - if string can not be parsed as a byte value, or radix < Character.MIN_RADIX || radix > Character.MAX_RADIX.

  • shortValue

    public short shortValue()

    Description copied from class: Number
    Returns this object's value as a short. Might involve rounding and/or truncating the value, so it fits into a short.

    Overrides:

    shortValue in class Number

    Returns:

    the primitive short value of this object.

  • toString

    public String toString()

    Description copied from class: Object
    Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:

       getClass().getName() + '@' + Integer.toHexString(hashCode())

    See Writing a useful toString method if you intend implementing your own toString method.

    Overrides:

    toString in class Object

    Returns:

    a printable representation of this object.

  • toHexString

    public static String toHexString(byte b,
                     boolean upperCase)

    Returns a two-digit hex string. That is, -1 becomes "ff" or "FF" and 2 becomes "02".

  • toString

    public static String toString(byte value)

    Returns a string containing a concise, human-readable description of the specified byte value.

    Parameters:

    value - the byte to convert to a string.

    Returns:

    a printable representation of value.

  • valueOf

    public static Byte valueOf(String string)
                        throws NumberFormatException

    Parses the specified string as a signed decimal byte value.

    Parameters:

    string - the string representation of a single byte value.

    Returns:

    a Byte instance containing the byte value represented by string.

    Throws:

    NumberFormatException - if string can not be parsed as a byte value.

    See Also:

    parseByte(String)

  • valueOf

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

    Parses the specified string as a signed byte value using the specified radix.

    Parameters:

    string - the string representation of a single byte value.

    radix - the radix to use when parsing.

    Returns:

    a Byte instance containing the byte value represented by string using radix.

    Throws:

    NumberFormatException - if string can not be parsed as a byte value, or radix < Character.MIN_RADIX || radix > Character.MAX_RADIX.

    See Also:

    parseByte(String, int)

  • valueOf

    public static Byte valueOf(byte b)

    Returns a Byte instance for the specified byte value.

    If it is not necessary to get a new Byte instance, it is recommended to use this method instead of the constructor, since it maintains a cache of instances which may result in better performance.

    Parameters:

    b - the byte value to store in the instance.

    Returns:

    a Byte instance containing b.

    Since:

    1.5