I am trying to stop a long running method after 10 seconds of execution, so far i followed the timer instructions on baeldung. https://www.baeldung.com/java-stop-execution-after-certain-time#1-using-a-timer When the method is a simple call to a thread sleep it works, but when I call my function with sub metho…
Tag: timer
Ending a timer using keyadapters?
So, I am creating this reaction time game that shows a blue ball and once you see that blue ball, you press up arrow key to get your reaction time once it turned blue. However, I am having trouble in creating a timer. I want the timer to start once the ball actually turns blue and want that timer to
How to pause and resum a timer in Java
I have a small game where I need to pause the timer when the user press Pause button and after to resume the timer and to continue to increase the seconds when the user press the Resume button. I researched a lot and I tried different solutions but none worked for me. Can you please help me to achieve this
Why does my Timer crashes my android activity when I stop it?
I’m trying to make a toggle button that can stop and replay a Timer, it worked just fine until I added a new method called “Set_BPM”. It starts and it stops correctly, it crashes when I try to start it again after I stopped it. This is the class where I’m using the Timer: And this is h…
CountDownTimer in Android using Java
I am trying to implement a timer in android. I am using the countdowntimer. Here, is the timer code: The timer keeps updating the amount of time left on the user’s screen. The problem is the timer keeps ending at 00:01 (1 second), it never displays 00:00 and the alarm tone rings 2 seconds after the time…
ScheduledExecutorService or ScheduledThreadPoolExecutor
I’m building an Android App which have to periodically do something in a Service. And I found that using ScheduledThreadPoolExecutor and ScheduledExecutorService is preferable to Timer. Can anyone explain the difference between ScheduledExecutorService and ScheduledThreadPoolExecutor and which one is mo…
How to stop Java Scanner from accepting input
So, I am working on a quiz taking program that works from the command line and the quizzes have time limits. What I want to do, is to stop the quiz right when the user’s time is up even if they’re in the middle of answering a question. I am using Java’s Scanner to get the user’s input,…
TimerTask class has to run only once in java
I have a class that runs for every 10 secs, but when I execute it more than once, multiple timers are started. If one timer is already running, I want the other timer calls to be ignored. I want only one timer to be running at a given point of time. Please help. My code: Answer I want the 1st
Java: Using Semaphore with timer
Hello im trying to synchronize classes using semaphore.acquire() and semaphore.release(). I’m calling semaphore.release() from a class named ReadSerialPort and semaphore.acquire() from WriteSerialPort to connect a phone-center to PC. My problem is that phone-center is not always responding. I would like…
Working around the “variable might not have been initialized” error
If this isn’t possible, could you suggest a better way to do this? I couldn’t find a method for it in ScheduledThreadPoolExecutor. basically what I’m trying to do is make this code be run 3 times then cancel the “timer.” I could probably use Swing Timer, but I don’t want to…