Question

I am evaluating user inputs as commands for my application. If the user presses Q, or q, and then hits enter, the application quits and execution terminates.

Is there a proper context, or best practices on how to do that? I do not have any resources to release, or anything like that. Should I just use System.exit(0);? Is there a recommended way to do that?

As my first approach I do something like this:

while (true){
    try{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        //Other logic goes here...
        if (br.readLine().equalsIgnoreCase("Q")){
            System.exit(0);
        }
    }
    catch (IOException ioe) {
        System.out.println("IO error trying to read your selection");
    }
}

Answer 1

You might as well return up to main() and return from there.

    private void loop() {
        while (true){
           try{
               BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

               //other logic goes here...
               if(br.readLine().equalsIgnoreCase("Q")){
                   return; // You're done and you are returning to the caller.
               }
           }
           catch (IOException ioe) {
               System.out.println("IO error trying to read your selection");
           }
        }
    }

    public static void main(String[] args) {
        loop();
    }

But if you don’t have anything to release, System.exit(0) is fine.