Java.util.LinkedList.peek() Method

Description

The java.util.LinkedList.peek() method retrieves, but does not remove, the head (first element) of this list.

Declaration

Following is the declaration for java.util.LinkedList.peek() method

public E peek()

Parameters

• NA

Return Value

This method returns the head of this list, or null if this list is empty

Exception

• NA

Example

The following example shows the usage of java.util.LinkedList.peek() method.

package com.tutorialspoint;

import java.util.*;

public class LinkedListDemo {

   public static void main(String[] args) {

      // create a LinkedList
      LinkedList list = new LinkedList();

      // add some elements
      list.add("Hello");
      list.add(2);
      list.add("Chocolate");
      list.add("10");

      // print the list
      System.out.println("LinkedList:" + list);

      // peek at the head of the list
      System.out.println("Head of the list:" + list.peek());
   }
}

Let us compile and run the above program, this will produce the following result:

LinkedList:[Hello, 2, Chocolate, 10]
Head of the list:Hello