/**
*Output:
F E D C B A
*/
import java.util.Comparator;
import java.util.TreeSet;
class MyComparator implements Comparator {
public int compare(String a, String b) {
String aStr, bStr;
aStr = a;
bStr = b;
return bStr.compareTo(aStr);
}
// No need to override equals.
}
public class MainClass {
public static void main(String args[]) {
TreeSet ts = new TreeSet(new MyComparator());
ts.add("C");
ts.add("A");
ts.add("B");
ts.add("E");
ts.add("F");
ts.add("D");
for (String element : ts)
System.out.print(element + " ");
System.out.println();
}
}