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Java – String indexOf() Method

Description

This method returns the index within this string of the first occurrence of the specified character or -1, if the character does not occur.

Syntax

Here is the syntax of this method −

public int indexOf(char ch)

Parameters

Here is the detail of parameters −

ch − a character.

Return Value

See the description.

Example

Live Demo

import java.io.*;
public class Test {

   public static void main(String args[]) {
      String Str = new String("Welcome to Tutorialspoint.com");
      System.out.print("Found Index :" );
      System.out.println(Str.indexOf( 'o' ));
   }
}

This will produce the following result −

Output

Found Index :4

java_strings.htm