1. WIKI教程
2. Java.util包
3. void removeAllElements()

void removeAllElements()

描述 (Description)

removeAllElements()方法用于从此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 (Declaration)

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

public void removeAllElements()

参数 (Parameters)

NA

返回值 (Return Value)

NA

异常 (Exception)

NA

例子 (Example)

以下示例显示了java.util.Vector.removeAllElements（）方法的用法。

package com.iowiki;
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