Question

I am totally new to Java and I’ve started with some simple console applications.

This is my current application’s code:

Scanner sc = new Scanner(System.in);
boolean ExitLoop = false;
ArrayList<Integer> IDs = new ArrayList<Integer>();
ArrayList<Double> averages = new ArrayList<Double>();
while(!ExitLoop)
{
    System.out.println("StudentID: ");
    IDs.add(sc.nextInt());
    System.out.println("Average: ");
    averages.add(sc.nextDouble());
    System.out.println("Do you want to register another student? [y/n] ");
    ExitLoop = (sc.next() == "n");
}

Sorry to ask such a silly question but I am really stuck in this, I hit “n” but the while loop does not stop, and keeps working. Have I done anything wrong? what should I do to finish the loop when user enters “n” meaning no?

Answer 1

One issue is:

sc.next() == "n"

should be

sc.next().equals("n")

String comparison should use equals() instead of == (except String literal comparison) and it is always better to follow java code conventions.