find a letter in string java code example

Example 1: character at index of string java

String str = "Grepper";
char ch = str.charAt(0);
//ch is assigned the value of G

Example 2: how to search for charecters in java

public class Test {
   public static void main(String args[]) {
      String str = new String("I81753490B9C/DQC");
      int index = str.indexOf('DQC');
      System.out.println("Index of the letter w :: "+index);
   }
}