Java示例集合比较

import java.util.Collections;

import java.util.Set;

import java.util.TreeSet;



public class MainClass {

   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));



      for(int i=0; i<=10;i++)System.out.print('-');

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

      System.out.println(Collections.max(set,

      String.CASE_INSENSITIVE_ORDER));

   }

}