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package jomm.utils;
/**
*
* @author User
*/
public class StringComparator
implements java.
util.
Comparator<String
>
{
private static StringComparator instance =
null;
public static StringComparator getInstance
()
{
if(StringComparator.
instance ==
null)
{
StringComparator.
instance =
new StringComparator
();
}
return StringComparator.
instance;
}
/** Creates a new instance of LongComparator */
private StringComparator
() {
}
/** Compares its two arguments for order. Returns a negative integer,
* zero, or a positive integer as the first argument is less than, equal
* to, or greater than the second.<p>
*
* The implementor must ensure that <tt>sgn(compare(x, y)) ==
* -sgn(compare(y, x))</tt> for all <tt>x</tt> and <tt>y</tt>. (This
* implies that <tt>compare(x, y)</tt> must throw an exception if and only
* if <tt>compare(y, x)</tt> throws an exception.)<p>
*
* The implementor must also ensure that the relation is transitive:
* <tt>((compare(x, y)>0) && (compare(y, z)>0))</tt> implies
* <tt>compare(x, z)>0</tt>.<p>
*
* Finally, the implementer must ensure that <tt>compare(x, y)==0</tt>
* implies that <tt>sgn(compare(x, z))==sgn(compare(y, z))</tt> for all
* <tt>z</tt>.<p>
*
* It is generally the case, but <i>not</i> strictly required that
* <tt>(compare(x, y)==0) == (x.equals(y))</tt>. Generally speaking,
* any comparator that violates this condition should clearly indicate
* this fact. The recommended language is "Note: this comparator
* imposes orderings that are inconsistent with equals."
*
* @param s1 the first object to be compared.
* @param s2 the second object to be compared.
* @return a negative integer, zero, or a positive integer as the
* first argument is less than, equal to, or greater than the
* second.
* @throws ClassCastException if the arguments' types prevent them from
* being compared by this Comparator.
*
*/
public int compare
(1.5.0/docs/api/java/lang/String.html">String s1,
1.5.0/docs/api/java/lang/String.html">String s2
)
{
int compareResult = s2.
compareTo(s1
);
if(compareResult
> 0
)
return -
1;
else if(compareResult
< 0
)
return 1;
return 0;
}
}