Class java.lang.Long 
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Class java.lang.Long 

java.lang.Object
|
   +----java.lang.Number
|
           +----java.lang.Long
public final class Long
extends Number
The Long class provides an object wrapper for Long data values and serves as a place for long-oriented operations. A wrapper is useful because most of Java's utility classes require the use of objects. Since longs are not objects in Java, they need to be "wrapped" in a Long instance.

Variable Index

o MAX_VALUE
The maximum value a Long can have.
o MIN_VALUE
The minimum value a Long can have.

Constructor Index

o Long(long)
Constructs a Long object initialized to the specified value.
o Long(String)
Constructs a Long object initialized to the value specified by the String parameter.

Method Index

o doubleValue()
Returns the value of this Long as a double.
o equals(Object)
Compares this object against the specified object.
o floatValue()
Returns the value of this Long as a float.
o getLong(String)
Gets a Long property.
o getLong(String, long)
Gets a Long property.
o getLong(String, Long)
Gets a Long property.
o hashCode()
Computes a hashcode for this Long.
o intValue()
Returns the value of this Long as an int.
o longValue()
Returns the value of this Long as a long.
o parseLong(String)
Assuming the specified String represents a long, return that long's value.
o parseLong(String, int)
Assuming the specified String represents a long, returns that long's value.
o toBinaryString(long)
Returns a new String object representing the specified long as unsigned octal number.
o toHexString(long)
Returns a new String object representing the specified long as unsigned hexidecimal number.
o toOctalString(long)
Returns a new String object representing the specified long as unsigned octal number.
o toString()
Returns a String object representing this Long's value.
o toString(long)
Returns a new String object representing the specified integer.
o toString(long, int)
Returns a new String object representing the specified long in the specified radix.
o valueOf(String)
Assuming the specified String represents a long, returns a new Long object initialized to that value.
o valueOf(String, int)
Assuming the specified String represents a long, returns a new Long object initialized to that value.

Variables

o MIN_VALUE 
public final static long MIN_VALUE
The minimum value a Long can have. The lowest minimum value that a Long can have is 0x8000000000000000.
o MAX_VALUE 
public final static long MAX_VALUE
The maximum value a Long can have. The larget maximum value that a Long can have is 0x7fffffffffffffff.

Constructors

o Long 
public Long(long value)
Constructs a Long object initialized to the specified value.
Parameters:
value - the initial value of the Long
o Long 
public Long(String s) throws NumberFormatException
Constructs a Long object initialized to the value specified by the String parameter. The radix is assumed to be 10.
Parameters:
s - the String to be converted to a Long
Throws: NumberFormatException
If the String does not contain a parsable long.

Methods

o toString 
public static String toString(long i,
                                int radix)
Returns a new String object representing the specified long in the specified radix.
Parameters:
i - the long to be converted
radix - the radix
See Also:
MIN_RADIX, MAX_RADIX
o toHexString 
public static String toHexString(long i)
Returns a new String object representing the specified long as unsigned hexidecimal number.
o toOctalString 
public static String toOctalString(long i)
Returns a new String object representing the specified long as unsigned octal number.
o toBinaryString 
public static String toBinaryString(long i)
Returns a new String object representing the specified long as unsigned octal number.
o toString 
public static String toString(long i)
Returns a new String object representing the specified integer. The radix is assumed to be 10.
Parameters:
i - the long to be converted
o parseLong 
public static long parseLong(String s,
                               int radix) throws NumberFormatException
Assuming the specified String represents a long, returns that long's value. Throws an exception if the String cannot be parsed as a long.
Parameters:
s - the String containing the integer
radix - the radix to be used
Throws: NumberFormatException
If the String does not contain a parsable integer.
o parseLong 
public static long parseLong(String s) throws NumberFormatException
Assuming the specified String represents a long, return that long's value. Throws an exception if the String cannot be parsed as a long. The radix is assumed to be 10.
Parameters:
s - the String containing the long
Throws: NumberFormatException
If the string does not contain a parsable long.
o valueOf 
public static Long valueOf(String s,
                             int radix) throws NumberFormatException
Assuming the specified String represents a long, returns a new Long object initialized to that value. Throws an exception if the String cannot be parsed as a long.
Parameters:
s - the String containing the long.
radix - the radix to be used
Throws: NumberFormatException
If the String does not contain a parsable long.
o valueOf 
public static Long valueOf(String s) throws NumberFormatException
Assuming the specified String represents a long, returns a new Long object initialized to that value. Throws an exception if the String cannot be parsed as a long. The radix is assumed to be 10.
Parameters:
s - the String containing the long
Throws: NumberFormatException
If the String does not contain a parsable long.
o intValue 
public int intValue()
Returns the value of this Long as an int.
Overrides:
intValue in class Number
o longValue 
public long longValue()
Returns the value of this Long as a long.
Overrides:
longValue in class Number
o floatValue 
public float floatValue()
Returns the value of this Long as a float.
Overrides:
floatValue in class Number
o doubleValue 
public double doubleValue()
Returns the value of this Long as a double.
Overrides:
doubleValue in class Number
o toString 
public String toString()
Returns a String object representing this Long's value.
Overrides:
toString in class Object
o hashCode 
public int hashCode()
Computes a hashcode for this Long.
Overrides:
hashCode in class Object
o equals 
public boolean equals(Object obj)
Compares this object against the specified object.
Parameters:
obj - the object to compare with
Returns:
true if the objects are the same; false otherwise.
Overrides:
equals in class Object
o getLong 
public static Long getLong(String nm)
Gets a Long property. If the property does not exist, it will return 0.
Parameters:
nm - the property name
o getLong 
public static Long getLong(String nm,
                             long val)
Gets a Long property. If the property does not exist, it will return val. Deals with Hexadecimal and octal numbers.
Parameters:
nm - the String name
val - the Long value
o getLong 
public static Long getLong(String nm,
Long val)
Gets a Long property. If the property does not exist, it will return val. Deals with Hexadecimal and octal numbers.
Parameters:
nm - the property name
val - the Long value 
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