java.util.Vector.removeAll(Collection<?> c) 方法示例

package com.codingdict;

import java.util.Vector;

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

      // create an empty Vector vec with an initial capacity of 4      
      Vector<Integer> vec = new Vector<Integer>(4);

      // use add() method to add elements in the vector
      vec.add(4);
      vec.add(3);
      vec.add(2);
      vec.add(1);

      // let us print all the elements available in vector
      System.out.println("Added numbers are :- ");

      for (Integer number : vec) {         
         System.out.println("Number = " + number);
      }
      System.out.println("Size of the vector: "+vec.size());

      // let us remove all the elements
      System.out.println("Removing all the elements");
      vec.removeAll(vec);
      System.out.println("Size of the vector: "+vec.size());       
   }     
}