Replacing string for only one time in Java?

Question

Saying that there are String A = "aabbccdd" and String B = "abcd", is there any way to remove the matching characters of String B towards String A for only one time?

Expected output is A = "abcd".

I know it will solve the problem when using for loops, but is there any simpler way to do it? For example, using replaceAll or regular expressions?

Answer 1

you can use distinct() method

public static void main(String[] args) {
        String str = "aabbccdd";
        String result = str.chars().distinct().boxed()
                .map(c -> (char) (c.intValue()))
                .map(String::valueOf)
                .collect(Collectors.joining());
        System.out.println(result);
    }