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PC World Komputer 1995 November
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long.java
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1995-08-11
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/*
* @(#)Long.java 1.14 95/05/18
*
* Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*/
package java.lang;
/**
* The Long class is a wrapper for long values.
* @version 1.14, 18 May 1995
* @author Lee Boynton
* @author Arthur van Hoff
*/
public final
class Long extends Number {
/**
* The minimum value a long can have.
*/
public static final long MIN_VALUE = 0x8000000000000000;
/**
* The maximum value a long can have.
*/
public static final long MAX_VALUE = 0x7fffffffffffffff;
/**
* The value of the long.
*/
private long value;
/**
* Constructs a Long object with the specified value.
* @param value the value of the long
*/
public Long(long value) {
this.value = value;
}
/**
* Returns the value of the Long as an int.
*/
public int intValue() {
return (int)value;
}
/**
* Returns the value of the Long as a long.
*/
public long longValue() {
return (long)value;
}
/**
* Returns the value of the Long as a float.
*/
public float floatValue() {
return (float)value;
}
/**
* Returns the value of the Long as a double.
*/
public double doubleValue() {
return (double)value;
}
/**
* Returns a string object representing this integer's value.
*/
public String toString() {
return String.valueOf(value);
}
/**
* Computes a hashcode for this long.
*/
public int hashCode() {
return (int)value;
}
/**
* Compares this object against some other object.
* @param obj the object to compare with
* @return true if the object is the same
*/
public boolean equals(Object obj) {
if ((obj != null) && (obj instanceof Long)) {
return value == ((Long)obj).longValue();
}
return false;
}
/**
* Returns the long that the string represents.
* @param s the string to be parsed
* @return the value of the string
* @exception NumberFormatException The string cannot be parsed.
*/
public static native Long valueOf(String s);
}