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Byte


java.lang

Class Byte

    • 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.
    • 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.
    • 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


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