Question

Write a java program that generates 10 random lowercase letters (range from ‘a’ – ‘z’) and stores the characters in an array. Call a method that replaces all repetitions of a character with asterisk character ‘*’. Use JOptionPane to show the content of the array in main method.

Answer 1

import javax.swing.*;

public class RandomCharacters {

    public static void removeRepetitions(char[] letters) {
        for (int i = 0; i < letters.length; i++) {
            for (int j = 0; j < i; j++) {
                if (letters[i] == letters[j]) {
                    letters[i] = '*';
                }
            }
        }
    }

    public static void main(String[] args) {
        char[] letters = new char[10];
        for (int i = 0; i < letters.length; i++) {
            letters[i] = (char) ('a' + Math.random() * 26);
        }
        removeRepetitions(letters);
        String s = "";
        for (int i = 0; i < letters.length; i++) {
            s += letters[i] + " ";
        }
        JOptionPane.showMessageDialog(null, s);
    }
}

Message (1) Iknaq* c* ey OK