How to repeat each of the individual letters in a piece of text? in Java

Question

As in a stutter the number of times specified by the provided multiplier if the text was \"dean\" and the multiplier 3, the result would be \"ffffdeeeaaannn\".

Answer 1

You are just appending the string itself n times for each character in it. You need to iterate through the string and append each character n times.

public static void repeatLetters()
{
    String text = "dean";
    int n = 3;
    StringBuilder repeat = new StringBuilder();
    for (int i = 0; i < text.length(); i++) {
        for (int j = 0; j < n; j++) {
            repeat.append(text.charAt(i));
        }
    }
    System.out.println(repeat);
}

Also, another solution would be to use regular expressions.

public static void repeatLetters()
{
    String text = "dean", replace = "";
    int n = 3;
    for (int i = 0; i < n; i++) replace += "$1";
    System.out.println(text.replaceAll("(.)", replace));
}