14 May String indexOf(String str, int fromIndex) method in Java

The indexOf(String str, int fromIndex) method in Java returns the index within this string of the first occurrence of the specified substring, starting at the specified index.

Syntax

Let us see the syntax,

int indexOf(String str, int fromIndex)

Parameters

Let us see the parameters,

The following are the parameters,

• str − string
• fromIndex − index to begin the search from

Example

The following is an example of indexOf(String str, int fromIndex),

public class StudyopediaDemo {

   public static void main(String args[]) {
	 
      String message = new String("Studyopedia provides free learning content!"); 
      String substr = new String("learning" );
      
      System.out.println("String: "+message);
      System.out.println("SubString: "+substr);
	  
      System.out.println("Index of substring: "+message.indexOf(substr, 10));
  } 
}

Output

The following is the output,