LinkedList void add(int index，Object o)方法 (LinkedList void add(int index, Object o) 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。

• In this method, the index is the position where we have to insert the element and Object is the element of the LinkedList.

  在此方法中，索引是我们必须插入元素的位置，而Object是LinkedList的元素。

• This method is used to insert an object at the specified position in the linked list.

  此方法用于在链接列表的指定位置插入对象。

• Index position starts from 0.

  索引位置从0开始。

Syntax:

句法：

    void add(int index , Object o){
}

Parameter(s):

参数：

We can pass two arguments as a parameter in the method and the object will add at the specified position of the linked list.

我们可以在方法中传递两个参数作为参数，并且该对象将添加到链接列表的指定位置。

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 add(int index，Object o)方法的示例 (Java program to demonstrate example of LinkedList add(int index, Object o) 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);
// Add new elements at index 2 i.e. The position of 
// newly inserted element is at the third position 
// of the linked list and here index is 2 and index starts from 0  
list.add(2, 25);
//  New list Output 
System.out.println("The new List is:" + list);
}
}

Output

输出量

D:\Programs>javac LinkList.java
D:\Programs>java LinkList2
The Current list is:[10, 20, 30, 40, 50]
The new List is:[10, 20, 25, 30, 40, 50]

翻译自: https://www.includehelp.com/java/linkedlist-void-add-int-index-object-o-method-with-example.aspx