java.lang.Object | +--java.lang.Long
The Long class wraps a value of the primitive type
in an object. An object of type
Long contains a single
field whose type is
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
The largest value of type
The smallest value of type
Constructs a newly allocated
Compares this object against the specified object.
Computes a hashcode for this Long.
Returns the value of this Long as a long value.
Parses the string argument as a signed decimal
Parses the string argument as a signed
Returns a String object representing this Long's value.
Returns a new String object representing the specified integer.
Creates a string representation of the first argument in the radix specified by the second argument.
|Methods inherited from class java.lang.Object|
public static final long MIN_VALUE
public static final long MAX_VALUE
public Long(long value)
Longobject that represents the primitive
value- the value to be represented by the
public static String toString(long i, int radix)
If the radix is smaller 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
'\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:
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.0123456789abcdefghijklmnopqrstuvwxyz
i- a long.
radix- the radix.
public static String toString(long i)
toString(long, int)method that takes two arguments.
longto be converted.
public static long parseLong(String s, int radix) throws NumberFormatException
longin 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.digitreturns a nonnegative value), except that the first character may be an ASCII minus sign
'-'('\u002d' to indicate a negative value. The resulting
longvalue 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:
Character.MIN_RADIXor larger than
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
radix- the radix to be used.
longrepresented by the string argument in the specified radix.
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. The resulting long value is returned, exactly as if the argument and the radix 10 were given as arguments to the
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.
s- a string.
longrepresented by the argument in decimal.
public long longValue()
longvalue represented by this object.
public String toString()
toString(long)method that takes one argument.
public int hashCode()
longvalue represented by this
Longobject. That is, the hashcode is the value of the expression:
public boolean equals(Object obj)
trueif and only if the argument is not
nulland is a
Longobject that contains the same
longvalue as this object.
obj- the object to compare with.
trueif the objects are the same;