java.util.Vector.add(int index,E element) 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(0,4);
      vec.add(1,3);
      vec.add(2,2);
      vec.add(3,1);

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

      for (Integer number : vec) {         
         System.out.println("Index :"+vec.indexOf(number) +" Number: " + number);
      }

      // added new number 10 at 3rd position/index
      vec.add(3,10);

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

      for (Integer number : vec) {         
         System.out.println("Index :"+vec.indexOf(number) +" Number: " + number);
      }
   }  
}