1. Description
2. Field Summary
3. Constructor Summary
4. Method Summary
5. Field Details
   1. MIN_VALUE
   2. MAX_VALUE
   3. TYPE
   4. SIZE
   5. BYTES
6. Constructor Details
   1. Byte(byte)
   2. Byte(String)
7. Method Details
   1. toString(byte)
   2. describeConstable()
   3. valueOf(byte)
   4. parseByte(String, int)
   5. parseByte(String)
   6. valueOf(String, int)
   7. valueOf(String)
   8. decode(String)
   9. byteValue()
   10. shortValue()
   11. intValue()
   12. longValue()
   13. floatValue()
   14. doubleValue()
   15. toString()
   16. hashCode()
   17. hashCode(byte)
   18. equals(Object)
   19. compareTo(Byte)
   20. compare(byte, byte)
   21. compareUnsigned(byte, byte)
   22. toUnsignedInt(byte)
   23. toUnsignedLong(byte)

• Field Summary

  Fields
  Modifier and Type

  Field

  Description

  static final int

  BYTES

  The number of bytes used to represent a byte value in two's complement binary form.

  static final byte

  MAX_VALUE

  A constant holding the maximum value a byte can have, 27-1.

  static final byte

  MIN_VALUE

  A constant holding the minimum value a byte can have, -27.

  static final int

  SIZE

  The number of bits used to represent a byte value in two's complement binary form.

  static final Class<Byte>

  TYPE

  The Class instance representing the primitive type byte.

• Constructor Summary

  Constructors
  Constructor

  Description

  Byte(byte value)

  Deprecated.

  It is rarely appropriate to use this constructor.

  Byte(String s)

  Deprecated.

  It is rarely appropriate to use this constructor.

• Method Summary

  All MethodsStatic MethodsInstance MethodsConcrete Methods

  Modifier and Type

  Method

  Description

  byte

  byteValue()

  Returns the value of this Byte as a byte.

  static int

  compare(byte x, byte y)

  Compares two byte values numerically.

  int

  compareTo(Byte anotherByte)

  Compares two Byte objects numerically.

  static int

  compareUnsigned(byte x, byte y)

  Compares two byte values numerically treating the values as unsigned.

  static Byte

  decode(String nm)

  Decodes a String into a Byte.

  Optional<DynamicConstantDesc<Byte>>

  describeConstable()

  Returns an Optional containing the nominal descriptor for this instance.

  double

  doubleValue()

  Returns the value of this Byte as a double after a widening primitive conversion.

  boolean

  equals(Object obj)

  Compares this object to the specified object.

  float

  floatValue()

  Returns the value of this Byte as a float after a widening primitive conversion.

  int

  hashCode()

  Returns a hash code for this Byte; equal to the result of invoking intValue().

  static int

  hashCode(byte value)

  Returns a hash code for a byte value; compatible with Byte.hashCode().

  int

  intValue()

  Returns the value of this Byte as an int after a widening primitive conversion.

  long

  longValue()

  Returns the value of this Byte as a long after a widening primitive conversion.

  static byte

  parseByte(String s)

  Parses the string argument as a signed decimal byte.

  static byte

  parseByte(String s, int radix)

  Parses the string argument as a signed byte in the radix specified by the second argument.

  short

  shortValue()

  Returns the value of this Byte as a short after a widening primitive conversion.

  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 int

  toUnsignedInt(byte x)

  Converts the argument to an int by an unsigned conversion.

  static long

  toUnsignedLong(byte x)

  Converts the argument to a long by an unsigned conversion.

  static Byte

  valueOf(byte b)

  Returns a Byte instance representing the specified byte value.

  static Byte

  valueOf(String s)

  Returns a Byte object holding the value given by the specified String.

  static Byte

  valueOf(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 declared in class Object

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

  Modifier and Type

  Method

  Description

  protected Object

  clone()

  Creates and returns a copy of this object.

  protected void

  finalize()

  Deprecated, for removal: This API element is subject to removal in a future version.

  Finalization is deprecated and subject to removal in a future release.

  final Class<?>

  getClass()

  Returns the runtime class of this Object.

  final void

  notify()

  Wakes up a single thread that is waiting on this object's monitor.

  final void

  notifyAll()

  Wakes up all threads that are waiting on this object's monitor.

  final void

  wait()

  Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

  final void

  wait(long timeoutMillis)

  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

  final void

  wait(long timeoutMillis, int nanos)

  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

• Field Details

  • 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

    public static final byte MAX_VALUE

    A constant holding the maximum value a byte can have, 27-1.

    See Also:

    • Constant Field Values

  • TYPE

    public static final Class<Byte> TYPE

    The Class instance representing the primitive type 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

  • BYTES

    public static final int BYTES

    The number of bytes used to represent a byte value in two's complement binary form.

    Since: 1.8 See Also:

    • Constant Field Values

• Constructor Details

  • Byte

    @Deprecated(since="9") public Byte(byte value)

    Deprecated.

    It is rarely appropriate to use this constructor. The static factory valueOf(byte) is generally a better choice, as it is likely to yield significantly better space and time performance.

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

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

  • Byte

    @Deprecated(since="9") public Byte(String s) throws NumberFormatException

    Deprecated.

    It is rarely appropriate to use this constructor. Use parseByte(String) to convert a string to a byte primitive, or use valueOf(String) to convert a string to a Byte object.

    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 - if the String does not contain a parsable byte.

• Method Details

  • 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 Returns: the string representation of the specified byte See Also:

    • Integer.toString(int)

  • describeConstable

    public Optional<DynamicConstantDesc<Byte>> describeConstable()

    Returns an Optional containing the nominal descriptor for this instance.

    Specified by: describeConstable in interface Constable Returns: an Optional describing the Byte instance Since: 15

  • valueOf

    public static 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), as this method is likely to yield significantly better space and time performance since all byte values are cached.

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

  • parseByte

    public static byte parseByte(String s, int radix) throws 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) returns a nonnegative value) except that the first character may be an ASCII minus sign '-' ('\u002D') to indicate a negative value or an ASCII plus sign '+' ('\u002B') to indicate a positive value. The resulting byte value is returned.

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

    • The first argument is null or is a string of length zero.
    • The radix is either smaller than Character.MIN_RADIX or larger than Character.MAX_RADIX.
    • Any character of the string is not a digit of the specified radix, except that the first character may be a minus sign '-' ('\u002D') or plus sign '+' ('\u002B') provided that the string is longer than length 1.
    • The value represented by the string is not a value of type byte.

    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 - If the string does not contain a parsable byte.

  • parseByte

    public static byte parseByte(String s) throws 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 or an ASCII plus sign '+' ('\u002B') to indicate a positive 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) method.

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

  • valueOf

    public static Byte valueOf(String s, int radix) throws 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) 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: Byte.valueOf(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 - If the String does not contain a parsable byte.

  • valueOf

    public static Byte valueOf(String s) throws 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) 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: Byte.valueOf(Byte.parseByte(s))

    Parameters: s - the string to be parsed Returns: a Byte object holding the value represented by the string argument 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. 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 as defined in section 3.10.1 of The Java Language Specification, except that underscores are not accepted between digits.

    The sequence of characters following an optional 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 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 - if the String does not contain a parsable byte. See Also:

    • parseByte(java.lang.String, int)

  • byteValue

    public byte byteValue()

    Returns the value of this Byte as a byte.

    Overrides: byteValue in class Number Returns: the numeric value represented by this object after conversion to type byte.

  • shortValue

    public short shortValue()

    Returns the value of this Byte as a short after a widening primitive conversion.

    Overrides: shortValue in class Number Returns: the numeric value represented by this object after conversion to type short. See Java Language Specification: 5.1.2 Widening Primitive Conversion
    

  • intValue

    public int intValue()

    Returns the value of this Byte as an int after a widening primitive conversion.

    Specified by: intValue in class Number Returns: the numeric value represented by this object after conversion to type int. See Java Language Specification: 5.1.2 Widening Primitive Conversion
    

  • longValue

    public long longValue()

    Returns the value of this Byte as a long after a widening primitive conversion.

    Specified by: longValue in class Number Returns: the numeric value represented by this object after conversion to type long. See Java Language Specification: 5.1.2 Widening Primitive Conversion
    

  • floatValue

    public float floatValue()

    Returns the value of this Byte as a float after a widening primitive conversion.

    Specified by: floatValue in class Number Returns: the numeric value represented by this object after conversion to type float. See Java Language Specification: 5.1.2 Widening Primitive Conversion
    

  • doubleValue

    public double doubleValue()

    Returns the value of this Byte as a double after a widening primitive conversion.

    Specified by: doubleValue in class Number Returns: the numeric value represented by this object after conversion to type double. See Java Language Specification: 5.1.2 Widening Primitive Conversion
    

  • toString

    public 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) method.

    Overrides: toString in class Object Returns: a string representation of the value of this object in base 10.

  • hashCode

    public int hashCode()

    Returns a hash code for this Byte; equal to the result of invoking intValue().

    Overrides: hashCode in class Object Returns: a hash code value for this Byte See Also:

    • Object.equals(java.lang.Object)
    • System.identityHashCode(Object)

  • hashCode

    public static int hashCode(byte value)

    Returns a hash code for a byte value; compatible with Byte.hashCode().

    Parameters: value - the value to hash Returns: a hash code value for a byte value. Since: 1.8

  • equals

    public boolean equals(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 in class Object Parameters: obj - the object to compare with Returns: true if the objects are the same; false otherwise. See Also:

    • Object.hashCode()
    • HashMap

  • compareTo

    public int compareTo(Byte anotherByte)

    Compares two Byte objects numerically.

    Specified by: compareTo in interface Comparable<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

  • compare

    public static int compare(byte x, byte y)

    Compares two byte values numerically. The value returned is identical to what would be returned by: Byte.valueOf(x).compareTo(Byte.valueOf(y))

    Parameters: x - the first byte to compare y - the second byte to compare Returns: the value 0 if x == y; a value less than 0 if x < y; and a value greater than 0 if x > y Since: 1.7

  • compareUnsigned

    public static int compareUnsigned(byte x, byte y)

    Compares two byte values numerically treating the values as unsigned.

    Parameters: x - the first byte to compare y - the second byte to compare Returns: the value 0 if x == y; a value less than 0 if x < y as unsigned values; and a value greater than 0 if x > y as unsigned values Since: 9

  • toUnsignedInt

    public static int toUnsignedInt(byte x)

    Converts the argument to an int by an unsigned conversion. In an unsigned conversion to an int, the high-order 24 bits of the int are zero and the low-order 8 bits are equal to the bits of the byte argument. Consequently, zero and positive byte values are mapped to a numerically equal int value and negative byte values are mapped to an int value equal to the input plus 28.

    Parameters: x - the value to convert to an unsigned int Returns: the argument converted to int by an unsigned conversion Since: 1.8

  • toUnsignedLong

    public static long toUnsignedLong(byte x)

    Converts the argument to a long by an unsigned conversion. In an unsigned conversion to a long, the high-order 56 bits of the long are zero and the low-order 8 bits are equal to the bits of the byte argument. Consequently, zero and positive byte values are mapped to a numerically equal long value and negative byte values are mapped to a long value equal to the input plus 28.

    Parameters: x - the value to convert to an unsigned long Returns: the argument converted to long by an unsigned conversion Since: 1.8

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