java.util.Vector.isEmpty() 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);

      // let us test the vector
      System.out.println("The vector does not have any element");
      System.out.println("The vector is empty: "+vec.isEmpty());

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

      // let us test the vector again
      System.out.println("The vector has elements");
      System.out.println("The vector is empty: "+vec.isEmpty());
   }     
}