public final class Long extends Number implements Comparable<Long>
Long class wraps a value of the primitive type long in an object. An object of type Long contains a
 single field whose type is long.
  In addition, this class provides several methods for converting
 a long to a String and a String to a long, as well as other constants and methods useful when dealing
 with a long.
 
Implementation note: The implementations of the "bit twiddling"
 methods (such as highestOneBit and
 numberOfTrailingZeros) are
 based on material from Henry S. Warren, Jr.'s Hacker's
 Delight, (Addison Wesley, 2002).
| Modifier and Type | Field and Description | 
|---|---|
| static int | BYTESThe number of bytes used to represent a  longvalue in two's
 complement binary form. | 
| static long | MAX_VALUEA constant holding the maximum value a  longcan
 have, 263-1. | 
| static long | MIN_VALUEA constant holding the minimum value a  longcan
 have, -263. | 
| static int | SIZEThe number of bits used to represent a  longvalue in two's
 complement binary form. | 
| static Class<Long> | TYPEThe  Classinstance representing the primitive typelong. | 
| Constructor and Description | 
|---|
| Long(long value)Constructs a newly allocated  Longobject that
 represents the specifiedlongargument. | 
| Long(String s)Constructs a newly allocated  Longobject that
 represents thelongvalue indicated by theStringparameter. | 
| Modifier and Type | Method and Description | 
|---|---|
| static int | bitCount(long i)Returns the number of one-bits in the two's complement binary
 representation of the specified  longvalue. | 
| byte | byteValue()Returns the value of this  Longas abyteafter
 a narrowing primitive conversion. | 
| static int | compare(long x,
       long y)Compares two  longvalues numerically. | 
| int | compareTo(Long anotherLong)Compares two  Longobjects numerically. | 
| static int | compareUnsigned(long x,
               long y)Compares two  longvalues numerically treating the values
 as unsigned. | 
| static Long | decode(String nm)Decodes a  Stringinto aLong. | 
| static long | divideUnsigned(long dividend,
              long divisor)Returns the unsigned quotient of dividing the first argument by
 the second where each argument and the result is interpreted as
 an unsigned value. | 
| double | doubleValue()Returns the value of this  Longas adoubleafter a widening primitive conversion. | 
| boolean | equals(Object obj)Compares this object to the specified object. | 
| float | floatValue()Returns the value of this  Longas afloatafter
 a widening primitive conversion. | 
| static Long | getLong(String nm)Determines the  longvalue of the system property
 with the specified name. | 
| static Long | getLong(String nm,
       long val)Determines the  longvalue of the system property
 with the specified name. | 
| static Long | getLong(String nm,
       Long val)Returns the  longvalue of the system property with
 the specified name. | 
| int | hashCode()Returns a hash code for this  Long. | 
| static int | hashCode(long value)Returns a hash code for a  longvalue; compatible withLong.hashCode(). | 
| static long | highestOneBit(long i)Returns a  longvalue with at most a single one-bit, in the
 position of the highest-order ("leftmost") one-bit in the specifiedlongvalue. | 
| int | intValue()Returns the value of this  Longas anintafter
 a narrowing primitive conversion. | 
| long | longValue()Returns the value of this  Longas alongvalue. | 
| static long | lowestOneBit(long i)Returns a  longvalue with at most a single one-bit, in the
 position of the lowest-order ("rightmost") one-bit in the specifiedlongvalue. | 
| static long | max(long a,
   long b)Returns the greater of two  longvalues
 as if by callingMath.max. | 
| static long | min(long a,
   long b)Returns the smaller of two  longvalues
 as if by callingMath.min. | 
| static int | numberOfLeadingZeros(long i)Returns the number of zero bits preceding the highest-order
 ("leftmost") one-bit in the two's complement binary representation
 of the specified  longvalue. | 
| static int | numberOfTrailingZeros(long i)Returns the number of zero bits following the lowest-order ("rightmost")
 one-bit in the two's complement binary representation of the specified
  longvalue. | 
| static long | parseLong(String s)Parses the string argument as a signed decimal  long. | 
| static long | parseLong(String s,
         int radix)Parses the string argument as a signed  longin the
 radix specified by the second argument. | 
| static long | parseUnsignedLong(String s)Parses the string argument as an unsigned decimal  long. | 
| static long | parseUnsignedLong(String s,
                 int radix)Parses the string argument as an unsigned  longin the
 radix specified by the second argument. | 
| static long | remainderUnsigned(long dividend,
                 long divisor)Returns the unsigned remainder from dividing the first argument
 by the second where each argument and the result is interpreted
 as an unsigned value. | 
| static long | reverse(long i)Returns the value obtained by reversing the order of the bits in the
 two's complement binary representation of the specified  longvalue. | 
| static long | reverseBytes(long i)Returns the value obtained by reversing the order of the bytes in the
 two's complement representation of the specified  longvalue. | 
| static long | rotateLeft(long i,
          int distance)Returns the value obtained by rotating the two's complement binary
 representation of the specified  longvalue left by the
 specified number of bits. | 
| static long | rotateRight(long i,
           int distance)Returns the value obtained by rotating the two's complement binary
 representation of the specified  longvalue right by the
 specified number of bits. | 
| short | shortValue()Returns the value of this  Longas ashortafter
 a narrowing primitive conversion. | 
| static int | signum(long i)Returns the signum function of the specified  longvalue. | 
| static long | sum(long a,
   long b)Adds two  longvalues together as per the + operator. | 
| static String | toBinaryString(long i)Returns a string representation of the  longargument as an unsigned integer in base 2. | 
| static String | toHexString(long i)Returns a string representation of the  longargument as an unsigned integer in base 16. | 
| static String | toOctalString(long i)Returns a string representation of the  longargument as an unsigned integer in base 8. | 
| String | toString()Returns a  Stringobject representing thisLong's value. | 
| static String | toString(long i)Returns a  Stringobject representing the specifiedlong. | 
| static String | toString(long i,
        int radix)Returns a string representation of the first argument in the
 radix specified by the second argument. | 
| static String | toUnsignedString(long i)Returns a string representation of the argument as an unsigned
 decimal value. | 
| static String | toUnsignedString(long i,
                int radix)Returns a string representation of the first argument as an
 unsigned integer value in the radix specified by the second
 argument. | 
| static Long | valueOf(long l)Returns a  Longinstance representing the specifiedlongvalue. | 
| static Long | valueOf(String s)Returns a  Longobject holding the value
 of the specifiedString. | 
| static Long | valueOf(String s,
       int radix)Returns a  Longobject holding the value
 extracted from the specifiedStringwhen parsed
 with the radix given by the second argument. | 
@Native public static final long MIN_VALUE
long can
 have, -263.@Native public static final long MAX_VALUE
long can
 have, 263-1.public static final Class<Long> TYPE
Class instance representing the primitive type
 long.@Native public static final int SIZE
long value in two's
 complement binary form.public static final int BYTES
long value in two's
 complement binary form.public Long(long value)
Long object that
 represents the specified long argument.value - the value to be represented by the
          Long object.public Long(String s) throws NumberFormatException
Long object that
 represents the long value indicated by the
 String parameter. The string is converted to a
 long value in exactly the manner used by the
 parseLong method for radix 10.s - the String to be converted to a
             Long.NumberFormatException - if the String does not
             contain a parsable long.parseLong(java.lang.String, int)public static String toString(long i, int radix)
If the radix is smaller than Character.MIN_RADIX
 or larger than Character.MAX_RADIX, then the radix
 10 is used instead.
 
If the first argument is negative, the first element of the
 result is the ASCII minus sign '-'
 ('\u002d'). If the first argument is not
 negative, no sign character appears in the result.
 
The remaining characters of the result represent the magnitude
 of the first argument. If the magnitude is zero, it is
 represented by a single zero character '0'
 ('\u0030'); otherwise, the first character of
 the representation of the magnitude will not be the zero
 character.  The following ASCII characters are used as digits:
 
   0123456789abcdefghijklmnopqrstuvwxyz
 
 These are '\u0030' through
 '\u0039' and '\u0061' through
 '\u007a'. If radix is
 N, then the first N of these characters
 are used as radix-N digits in the order shown. Thus,
 the digits for hexadecimal (radix 16) are
 0123456789abcdef. If uppercase letters are
 desired, the String.toUpperCase() method may
 be called on the result:
 
  Long.toString(n, 16).toUpperCase()
 i - a long to be converted to a string.radix - the radix to use in the string representation.Character.MAX_RADIX, 
Character.MIN_RADIXpublic static String toUnsignedString(long i, int radix)
If the radix is smaller than Character.MIN_RADIX
 or larger than Character.MAX_RADIX, then the radix
 10 is used instead.
 
Note that since the first argument is treated as an unsigned value, no leading sign character is printed.
If the magnitude is zero, it is represented by a single zero
 character '0' ('\u0030'); otherwise,
 the first character of the representation of the magnitude will
 not be the zero character.
 
The behavior of radixes and the characters used as digits
 are the same as toString.
i - an integer to be converted to an unsigned string.radix - the radix to use in the string representation.toString(long, int)public static String toHexString(long i)
long
 argument as an unsigned integer in base 16.
 The unsigned long value is the argument plus
 264 if the argument is negative; otherwise, it is
 equal to the argument.  This value is converted to a string of
 ASCII digits in hexadecimal (base 16) with no extra
 leading 0s.
 
The value of the argument can be recovered from the returned
 string s by calling Long.parseUnsignedLong(s,
 16).
 
If the unsigned magnitude is zero, it is represented by a
 single zero character '0' ('\u0030');
 otherwise, the first character of the representation of the
 unsigned magnitude will not be the zero character. The
 following characters are used as hexadecimal digits:
 
  0123456789abcdef
 
 These are the characters '\u0030' through
 '\u0039' and  '\u0061' through
 '\u0066'.  If uppercase letters are desired,
 the String.toUpperCase() method may be called
 on the result:
 
  Long.toHexString(n).toUpperCase()
 i - a long to be converted to a string.long
          value represented by the argument in hexadecimal
          (base 16).parseUnsignedLong(String, int), 
toUnsignedString(long, int)public static String toOctalString(long i)
long
 argument as an unsigned integer in base 8.
 The unsigned long value is the argument plus
 264 if the argument is negative; otherwise, it is
 equal to the argument.  This value is converted to a string of
 ASCII digits in octal (base 8) with no extra leading
 0s.
 
The value of the argument can be recovered from the returned
 string s by calling Long.parseUnsignedLong(s,
 8).
 
If the unsigned magnitude is zero, it is represented by a
 single zero character '0' ('\u0030');
 otherwise, the first character of the representation of the
 unsigned magnitude will not be the zero character. The
 following characters are used as octal digits:
 
  01234567
 
 These are the characters '\u0030' through
 '\u0037'.i - a long to be converted to a string.long
          value represented by the argument in octal (base 8).parseUnsignedLong(String, int), 
toUnsignedString(long, int)public static String toBinaryString(long i)
long
 argument as an unsigned integer in base 2.
 The unsigned long value is the argument plus
 264 if the argument is negative; otherwise, it is
 equal to the argument.  This value is converted to a string of
 ASCII digits in binary (base 2) with no extra leading
 0s.
 
The value of the argument can be recovered from the returned
 string s by calling Long.parseUnsignedLong(s,
 2).
 
If the unsigned magnitude is zero, it is represented by a
 single zero character '0' ('\u0030');
 otherwise, the first character of the representation of the
 unsigned magnitude will not be the zero character. The
 characters '0' ('\u0030') and '1' ('\u0031') are used as binary digits.
i - a long to be converted to a string.long
          value represented by the argument in binary (base 2).parseUnsignedLong(String, int), 
toUnsignedString(long, int)public static String toString(long i)
String object representing the specified
 long.  The argument is converted to signed decimal
 representation and returned as a string, exactly as if the
 argument and the radix 10 were given as arguments to the toString(long, int) method.i - a long to be converted.public static String toUnsignedString(long i)
toUnsignedString(long,
 int) method.i - an integer to be converted to an unsigned string.toUnsignedString(long, int)public static long parseLong(String s, int radix) throws NumberFormatException
long 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 long value is returned.
 Note that neither the character L
 ('\u004C') nor l
 ('\u006C') is permitted to appear at the end
 of the string as a type indicator, as would be permitted in
 Java programming language source code - except that either
 L or l may appear as a digit for a
 radix greater than or equal to 22.
 
An exception of type NumberFormatException is
 thrown if any of the following situations occurs:
 
null or is a string of
 length zero.
 radix is either smaller than Character.MIN_RADIX or larger than Character.MAX_RADIX.
 '-' ('\u002d') or plus sign '+' ('\u002B') provided that the string is
 longer than length 1.
 long.
 Examples:
 parseLong("0", 10) returns 0L
 parseLong("473", 10) returns 473L
 parseLong("+42", 10) returns 42L
 parseLong("-0", 10) returns 0L
 parseLong("-FF", 16) returns -255L
 parseLong("1100110", 2) returns 102L
 parseLong("99", 8) throws a NumberFormatException
 parseLong("Hazelnut", 10) throws a NumberFormatException
 parseLong("Hazelnut", 36) returns 1356099454469L
 s - the String containing the
                     long representation to be parsed.radix - the radix to be used while parsing s.long represented by the string argument in
             the specified radix.NumberFormatException - if the string does not contain a
             parsable long.public static long parseLong(String s) throws NumberFormatException
long.
 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 long value is
 returned, exactly as if the argument and the radix 10
 were given as arguments to the parseLong(java.lang.String, int) method.
 Note that neither the character L
 ('\u004C') nor l
 ('\u006C') is permitted to appear at the end
 of the string as a type indicator, as would be permitted in
 Java programming language source code.
s - a String containing the long
             representation to be parsedlong represented by the argument in
             decimal.NumberFormatException - if the string does not contain a
             parsable long.public static long parseUnsignedLong(String s, int radix) throws NumberFormatException
long in the
 radix specified by the second argument.  An unsigned integer
 maps the values usually associated with negative numbers to
 positive numbers larger than MAX_VALUE.
 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 plus
 sign '+' ('\u002B'). The resulting
 integer value is returned.
 An exception of type NumberFormatException is
 thrown if any of the following situations occurs:
 
null or is a string of
 length zero.
 Character.MIN_RADIX or
 larger than Character.MAX_RADIX.
 '+' ('\u002B') provided that the
 string is longer than length 1.
 long, 264-1.
 s - the String containing the unsigned integer
                  representation to be parsedradix - the radix to be used while parsing s.long represented by the string
             argument in the specified radix.NumberFormatException - if the String
             does not contain a parsable long.public static long parseUnsignedLong(String s) throws NumberFormatException
long. The
 characters in the string must all be decimal digits, except
 that the first character may be an an ASCII plus sign '+' ('\u002B'). The resulting integer value
 is returned, exactly as if the argument and the radix 10 were
 given as arguments to the parseUnsignedLong(java.lang.String, int) method.s - a String containing the unsigned long
            representation to be parsedlong value represented by the decimal string argumentNumberFormatException - if the string does not contain a
            parsable unsigned integer.public static Long valueOf(String s, int radix) throws NumberFormatException
Long 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
 long in the radix specified by the second
 argument, exactly as if the arguments were given to the parseLong(java.lang.String, int) method. The result is a
 Long object that represents the long
 value specified by the string.
 In other words, this method returns a Long object equal
 to the value of:
 
  new Long(Long.parseLong(s, radix))
 s - the string to be parsedradix - the radix to be used in interpreting sLong object holding the value
             represented by the string argument in the specified
             radix.NumberFormatException - If the String does not
             contain a parsable long.public static Long valueOf(String s) throws NumberFormatException
Long object holding the value
 of the specified String. The argument is
 interpreted as representing a signed decimal long,
 exactly as if the argument were given to the parseLong(java.lang.String) method. The result is a
 Long object that represents the integer value
 specified by the string.
 In other words, this method returns a Long object
 equal to the value of:
 
  new Long(Long.parseLong(s))
 s - the string to be parsed.Long object holding the value
             represented by the string argument.NumberFormatException - If the string cannot be parsed
             as a long.public static Long valueOf(long l)
Long instance representing the specified
 long value.
 If a new Long instance is not required, this method
 should generally be used in preference to the constructor
 Long(long), as this method is likely to yield
 significantly better space and time performance by caching
 frequently requested values.
 Note that unlike the corresponding method in the Integer class, this method
 is not required to cache values within a particular
 range.l - a long value.Long instance representing l.public static Long decode(String nm) throws NumberFormatException
String into a Long.
 Accepts decimal, hexadecimal, and octal numbers given by the
 following grammar:
 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.
- DecodableString:
- Signopt DecimalNumeral
- Signopt
0xHexDigits- Signopt
0XHexDigits- Signopt
#HexDigits- Signopt
0OctalDigits- Sign:
-
+
The sequence of characters following an optional
 sign and/or radix specifier ("0x", "0X",
 "#", or leading zero) is parsed as by the Long.parseLong 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.
nm - the String to decode.Long object holding the long
            value represented by nmNumberFormatException - if the String does not
            contain a parsable long.parseLong(String, int)public byte byteValue()
Long as a byte after
 a narrowing primitive conversion.public short shortValue()
Long as a short after
 a narrowing primitive conversion.shortValue in class Numbershort.public int intValue()
Long as an int after
 a narrowing primitive conversion.public long longValue()
Long as a
 long value.public float floatValue()
Long as a float after
 a widening primitive conversion.floatValue in class Numberfloat.public double doubleValue()
Long as a double
 after a widening primitive conversion.doubleValue in class Numberdouble.public String toString()
String object representing this
 Long's value.  The value is converted to signed
 decimal representation and returned as a string, exactly as if
 the long value were given as an argument to the
 toString(long) method.public int hashCode()
Long. The result is
 the exclusive OR of the two halves of the primitive
 long value held by this Long
 object. That is, the hashcode is the value of the expression:
 
  (int)(this.longValue()^(this.longValue()>>>32))
 hashCode in class ObjectObject.equals(java.lang.Object), 
System.identityHashCode(java.lang.Object)public static int hashCode(long value)
long value; compatible with
 Long.hashCode().value - the value to hashlong value.public boolean equals(Object obj)
true if and only if the argument is not
 null and is a Long object that
 contains the same long value as this object.equals in class Objectobj - the object to compare with.true if the objects are the same;
          false otherwise.Object.hashCode(), 
HashMappublic static Long getLong(String nm)
long value of the system property
 with the specified name.
 The first argument is treated as the name of a system
 property.  System properties are accessible through the System.getProperty(java.lang.String) method. The
 string value of this property is then interpreted as a long value using the grammar supported by decode
 and a Long object representing this value is returned.
 
If there is no property with the specified name, if the
 specified name is empty or null, or if the property
 does not have the correct numeric format, then null is
 returned.
 
In other words, this method returns a Long object
 equal to the value of:
 
  getLong(nm, null)
 nm - property name.Long value of the property.SecurityException - for the same reasons as
          System.getPropertySystem.getProperty(java.lang.String), 
System.getProperty(java.lang.String, java.lang.String)public static Long getLong(String nm, long val)
long value of the system property
 with the specified name.
 The first argument is treated as the name of a system
 property.  System properties are accessible through the System.getProperty(java.lang.String) method. The
 string value of this property is then interpreted as a long value using the grammar supported by decode
 and a Long object representing this value is returned.
 
The second argument is the default value. A Long object
 that represents the value of the second argument is returned if there
 is no property of the specified name, if the property does not have
 the correct numeric format, or if the specified name is empty or null.
 
In other words, this method returns a Long object equal
 to the value of:
 
  getLong(nm, new Long(val))
 
 but in practice it may be implemented in a manner such as:
 to avoid the unnecessary allocation of aLong result = getLong(nm, null); return (result == null) ? new Long(val) : result;
Long object when
 the default value is not needed.nm - property name.val - default value.Long value of the property.SecurityException - for the same reasons as
          System.getPropertySystem.getProperty(java.lang.String), 
System.getProperty(java.lang.String, java.lang.String)public static Long getLong(String nm, Long val)
long value of the system property with
 the specified name.  The first argument is treated as the name
 of a system property.  System properties are accessible through
 the System.getProperty(java.lang.String)
 method. The string value of this property is then interpreted
 as a long value, as per the
 decode method, and a Long object
 representing this value is returned; in summary:
 0x or the ASCII character #, not followed by
 a minus sign, then the rest of it is parsed as a hexadecimal integer
 exactly as for the method valueOf(java.lang.String, int)
 with radix 16.
 0 followed by another character, it is parsed as
 an octal integer exactly as by the method valueOf(java.lang.String, int) with radix 8.
 valueOf(java.lang.String, int) with radix 10.
 Note that, in every case, neither L
 ('\u004C') nor l
 ('\u006C') is permitted to appear at the end
 of the property value as a type indicator, as would be
 permitted in Java programming language source code.
 
The second argument is the default value. The default value is
 returned if there is no property of the specified name, if the
 property does not have the correct numeric format, or if the
 specified name is empty or null.
nm - property name.val - default value.Long value of the property.SecurityException - for the same reasons as
          System.getPropertySystem.getProperty(java.lang.String), 
System.getProperty(java.lang.String, java.lang.String)public int compareTo(Long anotherLong)
Long objects numerically.compareTo in interface Comparable<Long>anotherLong - the Long to be compared.0 if this Long is
          equal to the argument Long; a value less than
          0 if this Long is numerically less
          than the argument Long; and a value greater
          than 0 if this Long is numerically
           greater than the argument Long (signed
           comparison).public static int compare(long x,
                          long y)
long values numerically.
 The value returned is identical to what would be returned by:
 
    Long.valueOf(x).compareTo(Long.valueOf(y))
 x - the first long to comparey - the second long to compare0 if x == y;
         a value less than 0 if x < y; and
         a value greater than 0 if x > ypublic static int compareUnsigned(long x,
                                  long y)
long values numerically treating the values
 as unsigned.x - the first long to comparey - the second long to compare0 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 valuespublic static long divideUnsigned(long dividend,
                                  long divisor)
Note that in two's complement arithmetic, the three other
 basic arithmetic operations of add, subtract, and multiply are
 bit-wise identical if the two operands are regarded as both
 being signed or both being unsigned.  Therefore separate addUnsigned, etc. methods are not provided.
dividend - the value to be divideddivisor - the value doing the dividingremainderUnsigned(long, long)public static long remainderUnsigned(long dividend,
                                     long divisor)
dividend - the value to be divideddivisor - the value doing the dividingdivideUnsigned(long, long)public static long highestOneBit(long i)
long value with at most a single one-bit, in the
 position of the highest-order ("leftmost") one-bit in the specified
 long value.  Returns zero if the specified value has no
 one-bits in its two's complement binary representation, that is, if it
 is equal to zero.i - the value whose highest one bit is to be computedlong value with a single one-bit, in the position
     of the highest-order one-bit in the specified value, or zero if
     the specified value is itself equal to zero.public static long lowestOneBit(long i)
long value with at most a single one-bit, in the
 position of the lowest-order ("rightmost") one-bit in the specified
 long value.  Returns zero if the specified value has no
 one-bits in its two's complement binary representation, that is, if it
 is equal to zero.i - the value whose lowest one bit is to be computedlong value with a single one-bit, in the position
     of the lowest-order one-bit in the specified value, or zero if
     the specified value is itself equal to zero.public static int numberOfLeadingZeros(long i)
long value.  Returns 64 if the
 specified value has no one-bits in its two's complement representation,
 in other words if it is equal to zero.
 Note that this method is closely related to the logarithm base 2.
 For all positive long values x:
 
63 - numberOfLeadingZeros(x)
 64 - numberOfLeadingZeros(x - 1)
 i - the value whose number of leading zeros is to be computedlong value, or 64 if the value
     is equal to zero.public static int numberOfTrailingZeros(long i)
long value.  Returns 64 if the specified value has no
 one-bits in its two's complement representation, in other words if it is
 equal to zero.i - the value whose number of trailing zeros is to be computedlong value, or 64 if the value is equal
     to zero.public static int bitCount(long i)
long value.  This function is
 sometimes referred to as the population count.i - the value whose bits are to be countedlong value.public static long rotateLeft(long i,
                              int distance)
long value left by the
 specified number of bits.  (Bits shifted out of the left hand, or
 high-order, side reenter on the right, or low-order.)
 Note that left rotation with a negative distance is equivalent to
 right rotation: rotateLeft(val, -distance) == rotateRight(val,
 distance).  Note also that rotation by any multiple of 64 is a
 no-op, so all but the last six bits of the rotation distance can be
 ignored, even if the distance is negative: rotateLeft(val,
 distance) == rotateLeft(val, distance & 0x3F).
i - the value whose bits are to be rotated leftdistance - the number of bit positions to rotate leftlong value left by the
     specified number of bits.public static long rotateRight(long i,
                               int distance)
long value right by the
 specified number of bits.  (Bits shifted out of the right hand, or
 low-order, side reenter on the left, or high-order.)
 Note that right rotation with a negative distance is equivalent to
 left rotation: rotateRight(val, -distance) == rotateLeft(val,
 distance).  Note also that rotation by any multiple of 64 is a
 no-op, so all but the last six bits of the rotation distance can be
 ignored, even if the distance is negative: rotateRight(val,
 distance) == rotateRight(val, distance & 0x3F).
i - the value whose bits are to be rotated rightdistance - the number of bit positions to rotate rightlong value right by the
     specified number of bits.public static long reverse(long i)
long
 value.i - the value to be reversedlong value.public static int signum(long i)
long value.  (The
 return value is -1 if the specified value is negative; 0 if the
 specified value is zero; and 1 if the specified value is positive.)i - the value whose signum is to be computedlong value.public static long reverseBytes(long i)
long value.i - the value whose bytes are to be reversedlong value.public static long sum(long a,
                       long b)
long values together as per the + operator.a - the first operandb - the second operanda and bBinaryOperatorpublic static long max(long a,
                       long b)
long values
 as if by calling Math.max.a - the first operandb - the second operanda and bBinaryOperatorpublic static long min(long a,
                       long b)
long values
 as if by calling Math.min.a - the first operandb - the second operanda and bBinaryOperator Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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