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public  final  class  java.lang.Long
    extends  java.lang.Number  (I-§1.11)
{
        // Fields
    public final static long MAX_VALUE;	§1.9.1
    public final static long MIN_VALUE;	§1.9.2

        // Constructors
    public Long(long  value);	§1.9.3
    public Long(String  s);	§1.9.4

        // Methods
    public double doubleValue();	§1.9.5
    public boolean equals(Object  obj);	§1.9.6
    public float floatValue();	§1.9.7
    public static Long getLong(String  nm);	§1.9.8
    public static Long getLong(String  nm, long  val);	§1.9.9
    public static Long getLong(String  nm, Long  val);	§1.9.10
    public int hashCode();	§1.9.11
    public int intValue();	§1.9.12
    public long longValue();	§1.9.13
    public static long parseLong(String  s);	§1.9.14
    public static long parseLong(String  s, int  radix);	§1.9.15
    public static String toBinaryString(long  i);	§1.9.16
    public static String toHexString(long  i);	§1.9.17
    public static String toOctalString(long  i);	§1.9.18
    public String toString();	§1.9.19
    public static String toString(long  i);	§1.9.20
    public static String toString(long  i, int  radix);	§1.9.21
    public static Long valueOf(String  s);	§1.9.22
    public static Long valueOf(String  s, int  radix);	§1.9.23
}

In addition, this class provides a number of 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.

The largest value of type long.

The smallest value of type long.

Constructs a newly allocated Long object that represents the primitive long argument.

Parameters:

value - the value to be reprsented by the Long

Constructs a newly allocated Long object that represents the value represented by the string. The string is converted to an long value as if by the valueOf method (I-§1.9.22).

Parameters:

s - the string to be converted to a Long

Throws

NumberFormatException (I-§1.41)

If the String does not contain a parsable long integer.

Returns:

The long value represented by this object is converted to type double and the result of the conversion is returned.

Overrides:

doubleValue in class Number (I-§1.11.1).

The result is true if and only if the argument is not null and is a Long object that contains the same long value as this object.

Parameters:

obj - the object to compare with

Returns:

true if the objects are the same; false otherwise.

Overrides:

equals in class Object (I-§1.12.3).

Returns:

The long value represented by this object is converted to type float and the result of the conversion is returned.

Overrides:

floatValue in class Number (I-§1.11.2).

Determines the long value of the system property with the specified name.

The first argument is treated as the name of a system property to be obtained as if by the method System.getProperty (I-§1.18.10). The string value of this property is then interpreted as a long value and a Long object representing this value is returned. . The full details of the possible numeric formats are given in I-§1.9.10.

If there is no property with the specified name, or if the property does not have the correct numeric format, then null is returned.

Parameters:

nm - property name

Returns:

the Long value of the property.

Determines the long value of the system property with the specified name.

The first argument is treated as the name of a system property to be obtained as if by the method System.getProperty (I-§1.18.10). The string value of this property is then interpreted as a long value and a Long object representing this value is returned. The full details of the possible numeric formats is given in I-§1.9.10.

If there is no property with the specified name, or if the property does not have the correct numeric format, then a Long object that represents the value of the second argument is returned.

Parameters:

nm - property name

val - default value

Returns:

the Long value of the property.

Determines the long value of the system property with the specified name.

The first argument is treated as the name of a system property to be obtained as if by the method System.getProperty (I-§1.18.10). The string value of this property is then interpreted as a long value and a Long object representing this value is returned.

If the property value begins with "0x" or "#", not followed by a minus sign, the rest of it is parsed as a hexadecimal integer exactly as for the method Long.valueOf (I-§1.9.23) with radix 16.

If the property value begins with "0" then it is parsed as an octal integer exactly as for the method Long.valueOf (I-§1.9.23) with radix 8.

Otherwise the property value is parsed as a decimal integer exactly as for the method Long.valueOf (I-§1.9.23) with radix 10.

Note that, in every case, neither L nor l is permitted to appear at the end of the string.

The second argument is the default value. If there is no property of the specified name, or if the property does not have the correct numeric format, then the second argument is returned.

Parameters:

nm - the property name

val - the default Long value

Returns:

the long value of the property.

Returns:

a hash code value for this object.

Overrides:

hashCode in class Object (I-§1.12.6).

Returns:

the long value represented by this object is converted to type int and the result of the conversion is returned.

Overrides:

intValue in class Number (I-§1.11.3).

Returns:

the long value represented by this object is returned..

Overrides:

longValue in class Number (I-§1.11.4).

Parses the string argument as a signed decimal long. The characters in the string must all be decimal digits, except that the first character may be an ASCII minus sign '-' to indicate a negative value.

Parameters:

s - a string

Returns:

the long represented by the argument in decimal

Throws

NumberFormatException (I-§1.41)

If the string does not contain a parsable long.

Parses the string argument as a signed 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 (I-§1.2.7) returns a nonnegative value), except that the first character may be an ASCII minus sign '-' to indicate a negative value. The resulting long value is returned.

Parameters:

s - the String containing the long

radix - the radix to be used

Returns:

the long represented by the string argument in the specified radix.

Throws

NumberFormatException (I-§1.41)

If the string does not contain a parsable integer.

toBinaryString¹

Creates a string representation of the long argument as an unsigned integer in base 2.

The unsigned long value is the argument plus 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 0's.

Parameters:

i - a long

Returns:

the string representation of the unsigned long value represented by the argument in binary (base 2).

toHexString²

Creates a string representation of the long argument as an unsigned integer in base 16.

The unsigned long value is the argument plus 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 0's.

Parameters:

i - a long

Returns:

the string representation of the unsigned long value represented by the argument in hexadecimal (base 16).

toOctalString³

Creates a string representation of the long argument as an unsigned integer in base 8.

The unsigned long value is the argument plus 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 0's.

Parameters:

i - a long

Returns:

the string representation of the unsigned long value represented by the argument in octal (base 8).

Returns:

a string representation of this object in base 10.

Overrides:

toString in class Object (I-§1.12.9).

Parameters:

i - a long to be converted

Returns:

a string representation of the argument in base 10.

Creates a string representation of the first argument in the radix specified by the second argument.

If the radix is smaller than Character.MIN_RADIX (I-§1.2.3) or larger than Character.MAX_RADIX (I-§1.2.1), then the radix 10 is used instead.

If the first argument is negative, the first element of the result is the ASCII minus sign '-' . If the first argument is not negative, no sign character appears in the result. The following ASCII characters are used as digits:

0123456789abcdefghijklmnopqrstuvwxyz

Parameters:

i - a long

radix - the radix

Returns:

a string representation of the argument in the specified radix.

Parameters:

s - the string to be parsed

Returns:

a newly constructed Long initialized to the value represented by the string argument.

Throws

NumberFormatException (I-§1.41)

If the String does not contain a parsable long.

Parameters:

s - the String containing the long.

radix - the radix to be used

Returns:

a newly constructed Long initialized to the value represented by the string argument in the specified radix.

Throws

NumberFormatException (I-§1.41)

If the String does not contain a parsable long.

² This method is new in Java 1.1

³ This method is new in Java 1.1

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