IT. Expert System.

Android Reference

Long

java.lang

Class Long

java.lang.Object
- java.lang.Number
- - java.lang.Long

All Implemented Interfaces:

Serializable, Comparable<Long>
```
public final class Long
extends Number
implements Comparable<Long>
```
The wrapper for the primitive type long.
Implementation note: The "bit twiddling" methods in this class use techniques described in Henry S. Warren, Jr.'s Hacker's Delight, (Addison Wesley, 2002) and Sean Anderson's Bit Twiddling Hacks.

Since:

1.0

See Also:
Integer, Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static long`	`MAX_VALUE` Constant for the maximum `long` value, 2⁶³-1.
`static long`	`MIN_VALUE` Constant for the minimum `long` value, -2⁶³.
`static int`	`SIZE` Constant for the number of bits needed to represent a `long` in two's complement form.
`static Class<Long>`	`TYPE` The `Class` object that represents the primitive type `long`.

Constructor Summary

Constructors
Constructor and Description

Long(long value)
Constructs a new Long with the specified primitive long value.

Long(String string)
Constructs a new Long from the specified string.

Constructors
Constructor and Description
`Long(long value)` Constructs a new `Long` with the specified primitive long value.
`Long(String string)` Constructs a new `Long` from the specified string.

Method Summary

Methods
Modifier and Type	Method and Description
`static int`	`bitCount(long v)` Counts the number of 1 bits in the specified long value; this is also referred to as population count.
`byte`	`byteValue()` Returns this object's value as a byte.
`static int`	`compare(long lhs, long rhs)` Compares two `long` values.
`int`	`compareTo(Long object)` Compares this object to the specified long object to determine their relative order.
`static Long`	`decode(String string)` Parses the specified string and returns a `Long` instance if the string can be decoded into a long value.
`double`	`doubleValue()` Returns this object's value as a double.
`boolean`	`equals(Object o)` Compares this instance with the specified object and indicates if they are equal.
`float`	`floatValue()` Returns this object's value as a float.
`static Long`	`getLong(String string)` Returns the `Long` value of the system property identified by `string`.
`static Long`	`getLong(String string, long defaultValue)` Returns the `Long` value of the system property identified by `string`.
`static Long`	`getLong(String string, Long defaultValue)` Returns the `Long` value of the system property identified by `string`.
`int`	`hashCode()` Returns an integer hash code for this object.
`static long`	`highestOneBit(long v)` Determines the highest (leftmost) bit of the specified long value that is 1 and returns the bit mask value for that bit.
`int`	`intValue()` Returns this object's value as an int.
`long`	`longValue()` Gets the primitive value of this long.
`static long`	`lowestOneBit(long v)` Determines the lowest (rightmost) bit of the specified long value that is 1 and returns the bit mask value for that bit.
`static int`	`numberOfLeadingZeros(long v)` Determines the number of leading zeros in the specified long value prior to the `highest one bit`.
`static int`	`numberOfTrailingZeros(long v)` Determines the number of trailing zeros in the specified long value after the `lowest one bit`.
`static long`	`parseLong(String string)` Parses the specified string as a signed decimal long value.
`static long`	`parseLong(String string, int radix)` Parses the specified string as a signed long value using the specified radix.
`static long`	`reverse(long v)` Reverses the order of the bits of the specified long value.
`static long`	`reverseBytes(long v)` Reverses the order of the bytes of the specified long value.
`static long`	`rotateLeft(long v, int distance)` Rotates the bits of the specified long value to the left by the specified number of bits.
`static long`	`rotateRight(long v, int distance)` Rotates the bits of the specified long value to the right by the specified number of bits.
`short`	`shortValue()` Returns this object's value as a short.
`static int`	`signum(long v)` Returns the value of the `signum` function for the specified long value.
`static String`	`toBinaryString(long v)` Converts the specified long value into its binary string representation.
`static String`	`toHexString(long v)` Converts the specified long value into its hexadecimal string representation.
`static String`	`toOctalString(long v)` Converts the specified long value into its octal string representation.
`String`	`toString()` Returns a string containing a concise, human-readable description of this object.
`static String`	`toString(long n)` Converts the specified long value into its decimal string representation.
`static String`	`toString(long v, int radix)` Converts the specified signed long value into a string representation based on the specified radix.
`static Long`	`valueOf(long v)` Returns a `Long` instance for the specified long value.
`static Long`	`valueOf(String string)` Parses the specified string as a signed decimal long value.
`static Long`	`valueOf(String string, int radix)` Parses the specified string as a signed long 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 long MAX_VALUE
```
    Constant for the maximum long value, 2⁶³-1.
    
    See Also:
    Constant Field Values
  - MIN_VALUE
```
public static final long MIN_VALUE
```
    Constant for the minimum long value, -2⁶³.
    
    See Also:
    Constant Field Values
  - TYPE
```
public static final Class<Long> TYPE
```
    The Class object that represents the primitive type long.
  - SIZE
```
public static final int SIZE
```
    Constant for the number of bits needed to represent a long in two's complement form.
    
    Since:
    
    1.5
    
    See Also:
    Constant Field Values
- Constructor Detail
  - Long
```
public Long(long value)
```
    Constructs a new Long with the specified primitive long value.
    
    Parameters:
    value - the primitive long value to store in the new instance.
  - Long
```
public Long(String string)
     throws NumberFormatException
```
    Constructs a new Long from the specified string.
    
    Parameters:
    string - the string representation of a long value.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a long value.
    See Also:
    parseLong(String)
- Method Detail
  - byteValue
```
public byte byteValue()
```
    Description copied from class: Number
    
    Returns this object's value as a byte. Might involve rounding and/or truncating the value, so it fits into a byte.
    
    Overrides:
    
    byteValue in class Number
    
    Returns:
    the primitive byte value of this object.
  - compareTo
```
public int compareTo(Long object)
```
    Compares this object to the specified long object to determine their relative order.
    
    Specified by:
    
    compareTo in interface Comparable<Long>
    
    Parameters:
    object - the long object to compare this object to.
    
    Returns:
    a negative value if the value of this long is less than the value of object; 0 if the value of this long and the value of object are equal; a positive value if the value of this long is greater than the value of object.
    Since:
    
    1.2
    
    See Also:
    Comparable
  - compare
```
public static int compare(long lhs,
          long rhs)
```
    Compares two long 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 Long decode(String string)
                   throws NumberFormatException
```
    Parses the specified string and returns a Long instance if the string can be decoded into a long value. The string may be an optional minus sign "-" followed by a hexadecimal ("0x..." or "#..."), octal ("0..."), or decimal ("...") representation of a long.
    
    Parameters:
    string - a string representation of a long value.
    
    Returns:
    a Long containing the value represented by string.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a long 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 o)
```
    Compares this instance with the specified object and indicates if they are equal. In order to be equal, o must be an instance of Long and have the same long value as this object.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    o - the object to compare this long with.
    
    Returns:
    true if the specified object is equal to this Long; 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.
  - getLong
```
public static Long getLong(String string)
```
    Returns the Long value of the system property identified by string. Returns null if string is null or empty, if the property can not be found or if its value can not be parsed as a long.
    
    Parameters:
    string - the name of the requested system property.
    
    Returns:
    the requested property's value as a Long or null.
  - getLong
```
public static Long getLong(String string,
           long defaultValue)
```
    Returns the Long value of the system property identified by string. Returns the specified default value if string is null or empty, if the property can not be found or if its value can not be parsed as a long.
    
    Parameters:
    string - the name of the requested system property.
    defaultValue - the default value that is returned if there is no long system property with the requested name.
    
    Returns:
    the requested property's value as a Long or the default value.
  - getLong
```
public static Long getLong(String string,
           Long defaultValue)
```
    Returns the Long value of the system property identified by string. Returns the specified default value if string is null or empty, if the property can not be found or if its value can not be parsed as a long.
    
    Parameters:
    string - the name of the requested system property.
    defaultValue - the default value that is returned if there is no long system property with the requested name.
    
    Returns:
    the requested property's value as a Long or the default value.
  - 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()
```
    Gets the primitive value of this long.
    
    Specified by:
    
    longValue in class Number
    
    Returns:
    this object's primitive value.
  - parseLong
```
public static long parseLong(String string)
                      throws NumberFormatException
```
    Parses the specified string as a signed decimal long value. The ASCII character - ('-') is recognized as the minus sign.
    
    Parameters:
    string - the string representation of a long value.
    
    Returns:
    the primitive long value represented by string.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a long value.
  - parseLong
```
public static long parseLong(String string,
             int radix)
                      throws NumberFormatException
```
    Parses the specified string as a signed long value using the specified radix. The ASCII character - ('-') is recognized as the minus sign.
    
    Parameters:
    string - the string representation of a long value.
    radix - the radix to use when parsing.
    
    Returns:
    the primitive long value represented by string using radix.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a long 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.
  - toBinaryString
```
public static String toBinaryString(long v)
```
    Converts the specified long value into its binary string representation. The returned string is a concatenation of '0' and '1' characters.
    
    Parameters:
    v - the long value to convert.
    
    Returns:
    the binary string representation of v.
  - toHexString
```
public static String toHexString(long v)
```
    Converts the specified long value into its hexadecimal string representation. The returned string is a concatenation of characters from '0' to '9' and 'a' to 'f'.
    
    Parameters:
    v - the long value to convert.
    
    Returns:
    the hexadecimal string representation of l.
  - toOctalString
```
public static String toOctalString(long v)
```
    Converts the specified long value into its octal string representation. The returned string is a concatenation of characters from '0' to '7'.
    
    Parameters:
    v - the long value to convert.
    
    Returns:
    the octal string representation of l.
  - 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.
  - toString
```
public static String toString(long n)
```
    Converts the specified long value into its decimal string representation. The returned string is a concatenation of a minus sign if the number is negative and characters from '0' to '9'.
    
    Parameters:
    n - the long to convert.
    
    Returns:
    the decimal string representation of l.
  - toString
```
public static String toString(long v,
              int radix)
```
    Converts the specified signed long value into a string representation based on the specified radix. The returned string is a concatenation of a minus sign if the number is negative and characters from '0' to '9' and 'a' to 'z', depending on the radix. If radix is not in the interval defined by Character.MIN_RADIX and Character.MAX_RADIX then 10 is used as the base for the conversion.
    This method treats its argument as signed. If you want to convert an unsigned value to one of the common non-decimal bases, you may find toBinaryString(long), #toHexString, or toOctalString(long) more convenient.
    
    Parameters:
    v - the signed long to convert.
    radix - the base to use for the conversion.
    
    Returns:
    the string representation of v.
  - valueOf
```
public static Long valueOf(String string)
                    throws NumberFormatException
```
    Parses the specified string as a signed decimal long value.
    
    Parameters:
    string - the string representation of a long value.
    
    Returns:
    a Long instance containing the long value represented by string.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a long value.
    See Also:
    parseLong(String)
  - valueOf
```
public static Long valueOf(String string,
           int radix)
                    throws NumberFormatException
```
    Parses the specified string as a signed long value using the specified radix.
    
    Parameters:
    string - the string representation of a long value.
    radix - the radix to use when parsing.
    
    Returns:
    a Long instance containing the long value represented by string using radix.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a long value, or radix < Character.MIN_RADIX || radix > Character.MAX_RADIX.
    See Also:
    parseLong(String, int)
  - highestOneBit
```
public static long highestOneBit(long v)
```
    Determines the highest (leftmost) bit of the specified long value that is 1 and returns the bit mask value for that bit. This is also referred to as the Most Significant 1 Bit. Returns zero if the specified long is zero.
    
    Parameters:
    v - the long to examine.
    
    Returns:
    the bit mask indicating the highest 1 bit in v.
    Since:
    
    1.5
  - lowestOneBit
```
public static long lowestOneBit(long v)
```
    Determines the lowest (rightmost) bit of the specified long value that is 1 and returns the bit mask value for that bit. This is also referred to as the Least Significant 1 Bit. Returns zero if the specified long is zero.
    
    Parameters:
    v - the long to examine.
    
    Returns:
    the bit mask indicating the lowest 1 bit in v.
    Since:
    
    1.5
  - numberOfLeadingZeros
```
public static int numberOfLeadingZeros(long v)
```
    Determines the number of leading zeros in the specified long value prior to the highest one bit.
    
    Parameters:
    v - the long to examine.
    
    Returns:
    the number of leading zeros in v.
    Since:
    
    1.5
  - numberOfTrailingZeros
```
public static int numberOfTrailingZeros(long v)
```
    Determines the number of trailing zeros in the specified long value after the lowest one bit.
    
    Parameters:
    v - the long to examine.
    
    Returns:
    the number of trailing zeros in v.
    Since:
    
    1.5
  - bitCount
```
public static int bitCount(long v)
```
    Counts the number of 1 bits in the specified long value; this is also referred to as population count.
    
    Parameters:
    v - the long to examine.
    
    Returns:
    the number of 1 bits in v.
    Since:
    
    1.5
  - rotateLeft
```
public static long rotateLeft(long v,
              int distance)
```
    Rotates the bits of the specified long value to the left by the specified number of bits.
    
    Parameters:
    v - the long value to rotate left.
    distance - the number of bits to rotate.
    
    Returns:
    the rotated value.
    Since:
    
    1.5
  - rotateRight
```
public static long rotateRight(long v,
               int distance)
```
    Rotates the bits of the specified long value to the right by the specified number of bits.
    
    Parameters:
    v - the long value to rotate right.
    distance - the number of bits to rotate.
    
    Returns:
    the rotated value.
    Since:
    
    1.5
  - reverseBytes
```
public static long reverseBytes(long v)
```
    Reverses the order of the bytes of the specified long value.
    
    Parameters:
    v - the long value for which to reverse the byte order.
    
    Returns:
    the reversed value.
    Since:
    
    1.5
  - reverse
```
public static long reverse(long v)
```
    Reverses the order of the bits of the specified long value.
    
    Parameters:
    v - the long value for which to reverse the bit order.
    
    Returns:
    the reversed value.
    Since:
    
    1.5
  - signum
```
public static int signum(long v)
```
    Returns the value of the signum function for the specified long value.
    
    Parameters:
    v - the long value to check.
    
    Returns:
    -1 if v is negative, 1 if v is positive, 0 if v is zero.
    Since:
    
    1.5
  - valueOf
```
public static Long valueOf(long v)
```
    Returns a Long instance for the specified long value.
    If it is not necessary to get a new Long 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:
    v - the long value to store in the instance.
    
    Returns:
    a Long instance containing v.
    Since:
    
    1.5

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IT. Expert System.

Android Reference

Long

Class Long

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MAX_VALUE

MIN_VALUE

TYPE

SIZE

Constructor Detail

Long

Long

Method Detail

byteValue

compareTo

compare

decode

doubleValue

equals

floatValue

getLong

getLong

getLong

hashCode

intValue

longValue

parseLong

parseLong

shortValue

toBinaryString

toHexString

toOctalString

toString

toString

toString

valueOf

valueOf

highestOneBit

lowestOneBit

numberOfLeadingZeros

numberOfTrailingZeros

bitCount

rotateLeft

rotateRight

reverseBytes

reverse

signum

valueOf

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary