Collection Comparison

package com.swain.cell;

import java.util.Collections;

import java.util.Set;

import java.util.TreeSet;

public class Comparison {

       public static void main(String[] args) {

              String[] coins = { "Penny", "nickel", "dime", "Quarter", "dollar" };

              Set set = new TreeSet();

              for (int i = 0; i < coins.length; i++)

                     set.add(coins[i]);

              System.out.println(Collections.min(set));

              System.out.println(Collections.min(set, String.CASE_INSENSITIVE_ORDER));

              System.out.println("--");

              System.out.println(Collections.max(set));

              System.out.println(Collections.max(set, String.CASE_INSENSITIVE_ORDER));

       }

}