How to replace all characters in a Java string with stars

Question

I want to replace all the characters in a Java String with * character. So it shouldn\'t matter what character it is, it should be replaced with a *

Answer 1

public String allStar(String s) {
    StringBuilder sb = new StringBuilder(s.length());
    for (int i = 0; i < s.length(); i++) {
        sb.append('*');
    }
    return sb.toString();
}