Java Program to Find First Letter Index Value of a Substring

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01. Example:

public class indexOfFunction {
   public static void main(String args[]) {
	   
      String string01 = "Learn Java With Zeroones";
 
      int index1 = string01.indexOf("With");
      System.out.println("Start Index Of 'With': " + index1);
      
      int index2 = string01.indexOf("Java");
      System.out.println("Start Index Of 'Java': " + index2);
 
      int index3 = string01.indexOf("Zeroones", 4); 
      System.out.println("Start Index Of 'Zeroones': " + index3);

      int index4 = string01.indexOf("ea");
      System.out.println("Start Index Of 'ea': " + index4);
   }
}

Output:

Start Index Of 'With': 11
Start Index Of 'Java': 6
Start Index Of 'Zeroones': 16
Start Index Of 'ea': 1

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