Collections類的總結

Collections是類，Collection是接口

 

//Collections類的介紹

import java.util.Collections;

import java.util.Comparator;

import java.util.Iterator;

import java.util.LinkedList;

public class CollectionsTest

{

       public static void main(String[] args)

       {

              LinkedList list = new LinkedList();

              list.add(new Integer(-8));

              list.add(new Integer(20));

              list.add(new Integer(-20));

              list.add(new Integer(8));

              Comparator r = Collections.reverseOrder();

              Collections.sort(list, r);

              for(Iterator iter = list.iterator(); iter.hasNext();)

              {

                     System.out.println(iter.next() + " ");

              }

              System.out.println();

              Collections.shuffle(list);

              for(Iterator iter = list.iterator(); iter.hasNext();)

              {

                     System.out.println(iter.next() + " ");

              }

              System.out.println("minimum value: " + Collections.min(list));

              System.out.println("maximum value: " + Collections.max(list));

       }

}