Use the get() method of the LinkedList class to get elements in a linked list in Java

Use the get() method of the LinkedList class to get the elements in the linked list in Java

The linked list is a common data structure. It is composed of a series of nodes, each node contains an element. and a reference to the next node. In Java, we can use the LinkedList class to implement a linked list. The LinkedList class provides a get() method that can be used to obtain the element at a specified position in the linked list.

Below we will introduce how to use the get() method of the LinkedList class to obtain the elements in the linked list in Java, and give the corresponding sample code.

First, we need to create a LinkedList object and add some elements to it. We can add elements to the end of the linked list using the add() method.

import java.util.LinkedList;

public class LinkedListExample {
    public static void main(String[] args) {
        // 创建LinkedList对象
        LinkedList<String> linkedList = new LinkedList<>();

        // 向链表中添加元素
        linkedList.add("元素1");
        linkedList.add("元素2");
        linkedList.add("元素3");
        linkedList.add("元素4");

         // 输出链表中的元素
        System.out.println("链表中的元素：" + linkedList);
    }
}

Run the above code, we can see that the output result is: elements in the linked list: [Element 1, Element 2, Element 3, Element 4].

Next, we can use the get() method to obtain the specified element in the linked list. The get() method receives one parameter, which is the index of the element to be obtained. The index starts from 0 and represents the position of the first element in the linked list.

import java.util.LinkedList;

public class LinkedListExample {
    public static void main(String[] args) {
        // 创建LinkedList对象
        LinkedList<String> linkedList = new LinkedList<>();

        // 向链表中添加元素
        linkedList.add("元素1");
        linkedList.add("元素2");
        linkedList.add("元素3");
        linkedList.add("元素4");

        // 获取链表中索引为2的元素
        String element = linkedList.get(2);

        // 输出获取到的元素
        System.out.println("获取到的元素：" + element);
    }
}

Run the above code, we can see that the output result is: Obtained element: element 3.

It can be seen from the output results that the element at the specified index position in the linked list can be accurately obtained using the get() method.

It should be noted that if the obtained index exceeds the range of the linked list, that is, is greater than or equal to the size of the linked list or less than 0, the get() method will throw an IndexOutOfBoundsException exception. Therefore, before using the get() method, we need to ensure the validity of the index.

To sum up, we can use the get() method of the LinkedList class to get the elements in the linked list in Java. When writing code, you need to create a LinkedList object first and use the add() method to add elements to the linked list. Then, use the get() method to accurately obtain the element at the specified index position in the linked list.

I hope this article will help you understand the get() method of the LinkedList class to get elements in the linked list in Java!

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