indexOf() method in JAVA.(Four different ways to use indexOf() in JAVA)

CODING:

import javax.swing.JOptionPane;

class indexof

{

  public static void main(String[] args)

    {

     String s="Programming Example Of JAVA";

     System.out.println(s);

     System.out.println("E is " + s.indexOf('E') + "th Position.");

     String s1=JOptionPane.showInputDialog(null,"Choose any word in Programming Example Of JAVA");

     System.out.println(s1 + " is " + s.indexOf(s1) + "th Position.");

     System.out.println("Search E after 10th index at position :" + s.indexOf('E', 10));

     s1=JOptionPane.showInputDialog(null,"Choose any word in Examples Of JAVA.");

     System.out.println("Search " + s1 + "after 10th index at position :" + " is " + s.indexOf(s1,10) + "th Position.");

    }

}