Java.util.LinkedList.indexOf() Method

Description

The java.util.LinkedList.indexOf(Object o) method returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element.

Declaration

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

public int indexOf(Object o)

Parameters

• o -- element to search for

Return Value

This method returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element

Exception

• NA

Example

The following example shows the usage of java.util.LinkedList.indexOf() 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);

      // get the index for "Chocolate"
      System.out.println("Index for Chocolate:" + list.indexOf("Chocolate"));

      // get the index for "Coffee"
      System.out.println("Index for Coffee:" + list.indexOf("Coffee"));
   }
}

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

LinkedList:[Hello, 2, Chocolate, 10]
Index for Chocolate:2
Index for Coffee:-1