java.util.Vector.ensureCapacity() 方法

package com.codingdict;

import java.util.Vector;

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

      // create a vector of initial capacity 5
      Vector vec = new Vector(5);

      for (int i = 0; i < 10; i++) {
         vec.add(0,i);
      }
      System.out.println("Content of the vector: "+vec);
      System.out.println("Size of the vector: "+vec.size());  

      // ensure the capacity of the vector and add elements
      vec.ensureCapacity(40);

      for (int i = 0; i < 10; i++) {
         vec.add(0,i);
      }    
      System.out.println("Content of the vector after increasing the size: "+vec);
      System.out.println("Size of the vector after increase: "+vec.size());
   }    
}