LinkedList void clear()方法 (LinkedList void clear() method)

• This method is available in package java.util.Collection and here, Collection is an interface.

  该方法在java.util.Collection包中可用，在这里， Collection是一个接口。

• This method is declared in interface Collection and it is implemented by the class LinkedList.

  此方法在接口Collection中声明，并且由类LinkedList实现。

• This method is used to remove all the elements from the linked list.

  此方法用于从链接列表中删除所有元素。

• This method is used to remove or clear all the elements from the linked list and not delete the linked list.

  此方法用于从链接列表中删除或清除所有元素，而不删除链接列表。

Syntax:

句法：

    void  clear(){
}

Parameter(s):

参数：

This method does not accept any parameter.

此方法不接受任何参数。

Return value:

返回值：

The return type of this method is void that means this method returns nothing after execution.

该方法的返回类型为void ，这意味着该方法在执行后不返回任何内容。

Java程序演示LinkedList clear()方法的示例 (Java program to demonstrate example of LinkedList clear() method)

import java.util.LinkedList;
public class LinkList {
public static void main(String[] args) {
LinkedList list = new LinkedList();
// use add() method to add few elements in the list 
list.add(10);
list.add(20);
list.add(30);
list.add(40);
list.add(50);
//  Current list Output
System.out.println("The Current list is:" + list);
// Clear or remove all the elements from the list 
list.clear();
//  New list Output 
System.out.println("The new List is:" + list);
}
}

Output

输出量

D:\Programs>javac LinkList.java
D:\Programs>java LinkList
The Current list is:[10, 20, 30, 40, 50]
The new List is:[]

翻译自: https://www.includehelp.com/java/linkedlist-void-clear-method-with-example.aspx