// Order key-value pairs in descending lexicographical order of keys.
// Note that "1" comes before "5".
OrderedSet set = new OrderedSet( new GreaterString(), true );
set.add( "10" );
set.add( "10" );
set.add( "5" );
set.add( "5" );
System.out.println( "set = " + set );
int n = set.count( "10" );
System.out.println( "There are " + n + " objects that match 10" );
System.out.println( "Removing all occurrences of 10..." );
set.remove( "10" );
n = set.count( "10" );
System.out.println( "There are now " + n + " objects that match 10" );
System.out.println( "set = " + set );
