Java java.util.Vector.removeAllElements()用法及代碼示例

描述

這個removeAllElements()方法用於從此向量中刪除所有組件並將其大小設置為零。此方法在函數上與 clear 方法相同。

聲明

以下是聲明java.util.Vector.removeAllElements()方法

public void removeAllElements()

參數

NA

返回值

NA

異常

NA

示例

下麵的例子展示了 java.util.Vector.removeAllElements() 方法的用法。

package com.tutorialspoint;

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());

      System.out.println("Removing all elements");
      
      // lets remove all the elements
      vec.removeAllElements();

      System.out.println("Now size of the vector:"+vec.size());      
   } 
}

讓我們編譯並運行上麵的程序，這將產生以下結果。

Added numbers are:- 
Number = 4
Number = 3
Number = 2
Number = 1
Size of the vector:4
Removing all elements
Now size of the vector:0