java.util.Vector.removeAllElements() 方法

描述

removeAllElements() 方法用于从该向量中删除所有组件并将其大小设置为零。此方法在功能上与 clear 方法相同。

声明

以下是 java.util.Vector.removeAllElements() 方法的声明

public void removeAllElements()

参数

NA

返回值

NA

异常

NA

示例

下面的例子展示了 java.util.Vector.removeAllElements() 方法的使用。

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());      
   } 
}

让我们编译并运行上面的程序，这将产生以下结果.

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