How to find the index of given element of a Java List?

The indexOf(Object) method of the java.util.ArrayList class returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element. Using this method, you can find the index of a given element.

Example

 Live Demo

import java.util.ArrayList; public class ArrayListDemo {    public static void main(String[] args) {       ArrayList<String> arrlist = new ArrayList<String>(5);       arrlist.add("G");       arrlist.add("E");       arrlist.add("F");       arrlist.add("M");       System.out.println("Size of list: " + arrlist.size());       for (String value : arrlist) {          System.out.println("Value = " + value);       }       int retval=arrlist.indexOf("E");       System.out.println("The element E is at index " + retval);    } }

Output

Size of list: 4 Value = G Value = E Value = F Value = M The element E is at index 1