Question

I have this method that generates random questions, I want to be able to generate each question once and no more than once.
How could I do that?

This is the code so far:

package boss;
import java.util.Random;
import javax.swing.JFrame;


public class Boss {
    public static void main(String[] args) {

        LoginWindow window = new LoginWindow();
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setVisible(true);
    }

    public String getQuestions() {
        String [] question = new String[30];
        question[0] = "hello";
        question[1] ="yo";
        question[2] ="b";
        question[3] ="ha";

        //Generating random questions
        Random r = new Random();
        int i=r.nextInt(4);
        String quest=question[i];
        return quest;
    }
}

Answer 1

you have to keep a list of the ones you’ve already used and check against that.

boolean used[] = new boolean[30];
int i;

do {
    Random r = new Random();
    i=r.nextInt(4);

} while(used[i] == true);

String quest=question[i];
used[i] = true;