I am trying to make a text based game which involves a timer in the centre of the screen.

The idea is that every 10 seconds, your strength(stamina) depletes by -2. And once you get to 0% strength, you die.

So far, I have a working timer, not yet converted into mins:seconds, just a basic seconds timer, however, my strength starts on 0% rather than 100% and the number does not change

I tried this by making a while loop with a nested if loop inside of it.

My thought process involved:

While strength is bigger than 0%, if second % 10 == 0 then deplete by -2 and set new strength to new value

Else if second % 10 != 0 then second

I'd really appreciate any help as it is for my A level course

CodePudding user response：

I suggest you focus your attention on the stamina level rather than on accumulating time count. The stamina level is what drives your game really. And I imagine your game might eventually gain a feature where stamina can increase as well as decrease.

`ScheduledExecutorService`

A scheduled executor service can run a task after a specified amount of time elapses.

ScheduledExecutorService ses = Executors. newSingleThreadScheduledExecutor() ;

Define your task as implementing Runnable or Callable. That task would do three things, after checking that we have some remaining stamina:

Decrement the stamina level kept in an AtomicInteger.
Call back to the user-interface to note the change in stamina status. GUI frameworks such as Vaadin, JavaFX, and Swing offer a hook for thread-safe callbacks.
Reschedule itself with the scheduled executor service.

Be sure to eventually shut down your executor service before your app ends. See boilerplate code given on Javadoc for ExecutorService.

CodePudding user response：

Not certain how this will fit into your design but here is one way to schedule a countDown timer.

First, create a class that subclasses TimerTask.

class MyTask extends TimerTask {
     int strength;
     int decrement;

     public MyTask(int initialStrength, int decrement) {
         this.strength = initialStrength;
         this.decrement = decrement;
     }

     public void run() {
         strength -= decrement;
         System.out.println(strength);
     }

     public int getStrength() {
          return strength;
     }
 }

The you can start a Timer supplying the task, initial delay, and duration. Here the duration is 2 seconds.

Timer t = new Timer("MyTimer");
MyTask myTask = new MyTask(1000, 2);
t.schedule(myTask, 0, TimeUnit.SECONDS.toMillis(2));

prints every two seconds

98
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92
90
88
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