java.util.Collections.disjoint() 方法

package com.codingdict;

import java.util.*;

public class CollectionsDemo {
   public static void main(String args[]) {

      // create two lists    
      List<String> srclst = new ArrayList<String>(5);
      List<String> destlst = new ArrayList<String>(10);

      // populate two lists
      srclst.add("Java");
      srclst.add("is");
      srclst.add("best");

      destlst.add("C++");
      destlst.add("is not");
      destlst.add("older");      

      // check elements in both collections
      boolean iscommon = Collections.disjoint(srclst, destlst);

      System.out.println("No commom elements: "+iscommon);    
   }    
}