Java.util.LinkedList.indexOf() Method


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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

java_util_linkedlist.htm

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