Question

Please use basic Java program and comment so that I understand what is going on.  

1. write a class called lab1. (This will be your program.)
2. In that class:
3. Write the main method that calls multiConcat.
4. Write a method called multiConcat that takes a String and an integer as parameters and prints a String that is the parameter string concatenated with itself n number of times (where n is the second parameter). For example, if the parameters are “hi” and 4, the return value is "hihihihi".

Answer 1

public class lab1 {

    public static String multiConcat(String s, int n) {
        String result = ""; // set result to empty string
        for (int i = 0; i < n; i++) {   // loop n times
            result += s;    // every time through the loop. add s to result
        }
        return result;  // return final result
    }

    public static void main(String[] args) {
        System.out.println(multiConcat("hi", 4));
    }
}