Java.util.LinkedList.peek() Method


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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.

Live Demo
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

java_util_linkedlist.htm

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