Java: replace a set of characters with other different characters

Question

I am supposed to make a custom decorator so I can replace both in an input from console and from a file:

1. A set of chars with a specific character (e.g. char[

Answer 1

There is a more faster way:

public static void main(String[] args) {
    String target      = "ab";
    String replacement = "**";

    char[] array = "abcde".toCharArray();
    for (int i = 0; i < array.length; i++) {
        int index = target.indexOf(array[i]);
        if (index != -1) {
            array[i] = replacement.charAt(index);
        }
    }

    System.out.println(array);
}