Remove characters at certain position at string

Question

I want to remove certain characters at specific positions of the String. I have the positions, but I am facing problems removing the characters.

what i am doing is:

if (string.subSequence(k, k + 4).equals("\n\t\t\t")){
    string = string.subSequence(0, k) + "" + s.subSequence(k, s.length());
}

I need to remove "\n\t\t\t" from string

Answer 1

Use StringBuilder:

StringBuilder sb = new StringBuilder(str);

sb.delete(start, end);
sb.deleteCharAt(index);

String result = sb.toString();

Answer 2

Use StringBuilder

String str="    ab a acd";
        StringBuilder sb = new StringBuilder(str);

        sb.delete(0,3);
        sb.deleteCharAt(0);

        String result = sb.toString();
        System.out.println(result);