Differences in Object modifications

Question

i was just wondering if anybody could help me out with this :

    StringBuilder s=new StringBuilder(\"0123456789\");
    s.substring(1, 2);
    System.out.printl         


        

Answer 1

@Hauptman Koening

Try this with your own example, hope it will clarify

    StringBuilder s = new StringBuilder("0123456789");
    String substring = s.substring(1, 2); // See here it returns a String, remember Strings are constants i.e. not mutable, not modifying the original StringBuilder s
    System.out.println(substring);
    StringBuilder delete = s.delete(2, 8); // see here it returns the String Builder, so remember StringBuilder is a mutable sequence of characters, hence modified the original
    System.out.println(delete);