| java.lang.Object
 java.lang.Long
| Long | | final public class Long (Code) | | The 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.
version:
12/17/01 (CLDC 1.1)
since:
JDK1.0, CLDC 1.0 |
| Field Summary | |
| final public static long | MAX_VALUE
The largest value of type long. | | final public static long | MIN_VALUE
The smallest value of type long. |
| Constructor Summary | |
| public | Long(long value)
Constructs a newly allocated Long object that
represents the primitive long argument. |
| Method Summary | |
| public double | doubleValue()
Returns the value of this Long as a double. | | public boolean | equals(Object obj)
Compares this object against the specified object.
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. | | public float | floatValue()
Returns the value of this Long as a float. | | public int | hashCode()
Computes a hashcode for this Long. | | public long | longValue()
Returns the value of this Long as a long value. | | public static long | parseLong(String s, int radix)
Parses the string argument as a signed long in the
radix specified by the second argument. | | public static long | parseLong(String s)
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
'-' (\u002d') to indicate a negative
value. | | public static String | toString(long i, int radix)
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 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'. | | public static String | toString(long i)
Returns a new String object representing the specified integer.
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
Long.toString(long,int) method that takes two arguments.
Parameters:
i - a long to be converted. | | public String | toString()
Returns a String object representing this Long's value. |
| MAX_VALUE | | final public static long MAX_VALUE(Code) | | The largest value of type long.
|
| MIN_VALUE | | final public static long MIN_VALUE(Code) | | The smallest value of type long.
|
| Long | | public Long(long value)(Code) | | Constructs a newly allocated Long object that
represents the primitive long argument.
Parameters:
value - the value to be represented by theLong object. |
| doubleValue | | public double doubleValue()(Code) | | Returns the value of this Long as a double.
the long value represented by this object thatis converted to type double and the result ofthe conversion is returned.
since:
CLDC 1.1 |
| equals | | public boolean equals(Object obj)(Code) | | Compares this object against the specified object.
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. true if the objects are the same;false otherwise. |
| floatValue | | public float floatValue()(Code) | | Returns the value of this Long as a float.
the long value represented by this object isconverted to type float and the result ofthe conversion is returned.
since:
CLDC 1.1 |
| hashCode | | public int hashCode()(Code) | | Computes a hashcode for this Long. The result is the exclusive
OR of the two halves of the primitive long value
represented by this Long object. That is, the hashcode
is the value of the expression:
(int)(this.longValue()^(this.longValue()>>>32))
a hash code value for this object. |
| longValue | | public long longValue()(Code) | | Returns the value of this Long as a long value.
the long value represented by this object. |
| parseLong | | public static long parseLong(String s, int radix) throws NumberFormatException(Code) | | 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 returns a
nonnegative value), except that the first character may be an
ASCII minus sign '-' ('\u002d' to indicate
a negative value. The resulting long value is returned.
Note that neither L nor l 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 22.
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
java.lang.Character.MIN_RADIX or larger than
java.lang.Character.MAX_RADIX .
- The first character of the string is not a digit of the
specified radix and is not a minus sign '-'
('\u002d').
- The first character of the string is a minus sign and the
string is of length 1.
- Any character of the string after the first is not a digit of
the specified radix.
- The integer value represented by the string cannot be
represented as a value of type long.
Examples:
parseLong("0", 10) returns 0L
parseLong("473", 10) returns 473L
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
Parameters:
s - the String containing thelong.
Parameters:
radix - the radix to be used. the long represented by the string argument inthe specified radix.
exception:
NumberFormatException - if the string does not contain aparsable integer. |
| parseLong | | public static long parseLong(String s) throws NumberFormatException(Code) | | 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
'-' (\u002d') to indicate a negative
value. The resulting long value is returned, exactly as if the
argument and the radix 10 were given as arguments to the
Long.parseLong(String,int) method that takes two arguments.
Note that neither L nor l is permitted to appear
at the end of the string as a type indicator, as would be permitted
in Java programming language source code.
Parameters:
s - a string. the long represented by the argument in decimal.
exception:
NumberFormatException - if the string does not contain aparsable long. |
| toString | | public static String toString(long i, int radix)(Code) | | 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 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 the
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.
Parameters:
i - a long.
Parameters:
radix - the radix. a string representation of the argument in the specified radix.
See Also: java.lang.Character.MAX_RADIX
See Also: java.lang.Character.MIN_RADIX |
| toString | | public static String toString(long i)(Code) | | Returns a new String object representing the specified integer.
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
Long.toString(long,int) method that takes two arguments.
Parameters:
i - a long to be converted. a string representation of the argument in base 10. |
| toString | | public String toString()(Code) | | Returns a String object representing this Long's value.
The long integer value represented by this Long object is converted
to signed decimal representation and returned as a string, exactly
as if the long value were given as an argument to the
Long.toString(long) method that takes one argument.
a string representation of this object in base 10. |
|
|