find char in string java

1public class Test {
2   public static void main(String args[]) {
3      String str = new String("I81753490B9C/DQC");
4      int index = str.indexOf('DQC');
5      System.out.println("Index of the letter w :: "+index);
6   }
7}

1String str = "testdemo";
2      System.out.println("String: "+str);
3      int index = str.indexOf( 'h' );
4      System.out.printf("'h' is at index %d\n", index);