/*
Demonstration of Comparator.  Use to compare strings based on length.

this is a function object as it has no data; it is merely a function (or set of functions) we can pass around
*/
public class StringLengthComparator implements Comparator<String>
{
	public int compare(String a,String b)
	{
		return a.length()-b.length();
	}

	public static void main(String[] args)
	{
		StringLengthComparator comp=new StringLengthComparator();
		String a="short";
		String b="really long";
		System.out.println("Comparing '"+a+"' & '"+b+"': "+comp.compare(a,b));
	}
}