index of java code example

Example 1: String indexOf(String str int fromIndex) method in java

import java.util.*;
public class StringIndexOfMethodExample
{
   public static void main(String[] args)
   {
      String strInput = new String("hello world core java");
      String strSub = new String("core");
      System.out.print("Index found: " );
      System.out.println(strInput.indexOf(strSub, 3));
   }
}

Example 2: find first occurrence of character in string

// applies to C#
string S = "Any String At All"
int Sindex = S.indexOf("A") // accepts string or char arguments. 

// "Sindex" would be equal to "0", as the indexOf(); meathod returns
// the index position of the first occurance of the specified argument.

Example 3: java indexof not found

The java string indexOf() method returns index of given character value or substring. If it is not found, it returns -1. The index counter starts from zero.