[英]How to pause a thread using wait and notify JavaFX
I am unclear on how to use wait() and notify() to pause a thread. 我不清楚如何使用wait()和notify()来暂停一个线程。 I read talk about synchronizing, but I'm unsure how to do it in my instance.
我读过有关同步的讨论,但我不确定如何在我的实例中执行此操作。 I have a music player with a progress bar where I want to pause the thread in control of syncing the progress bar with the music.
我有一个带进度条的音乐播放器,我想暂停线程以控制进度条与音乐的同步。 Here is the thread I want to pause:
这是我要暂停的主题:
@FXML private void clickedButton(ActionEvent event){
shuffle.setOnAction(e -> {
artistPane.setText(model.getCurrentSong());
if(firstTime){
//Multithreading with JavaFX. Essentially this other thread will check the slider to make sure its on track.
sliderThread = new Task<Void>() {
@Override
protected Void call() throws Exception {
boolean fxApplicationThread = Platform.isFxApplicationThread();
System.out.println("Is call on FXApplicationThread: " + fxApplicationThread);
//this is an infinite loop because now I only need to make this thread once, pausing and starting it, as opposed to making many threads
for(;;){
Thread.sleep(100);
progressBar.setValue(controller.getPercentageDone());
}
}
};
new Thread(sliderThread).start();
firstTime = false;
}else if(!model.getIsPlaying()){
//I want to start the thread here
}
controller.shuffle(); //this will start the music on the next song
});
Here is the second half where I also want to pause and start the thread: 这是下半场,我也想暂停并启动线程:
play.setOnAction(e -> {
controller.play(); //this will pause/start the music
if(!model.getIsPlaying()){
//where I want to pause the thread.
}else{
//I want to start the thread here
}
});
I will try to give you simple example and you try to apply it to your program... 我将尝试给你一个简单的例子,你试着将它应用到你的程序中......
public class TestClass extends JPanel {
/**
*
*/
private static final long serialVersionUID = 1L;
private Thread playThread ;
TestClass() {
playThread = new Thread(new Runnable() {
@Override
public void run() {
System.out.println("DO SOME THING HERE");
System.out.println("SONG WILL PLAY.....");
}
});
}
public void startMyPlayer() {
System.out.println("PLAYING NOW...");
playThread.start();
}
public void pauseMyPlayer() throws InterruptedException {
System.out.println("PAUSED NOW...");
playThread.wait();
}
public void resumeMyPlayer() {
System.out.println("RESUMING NOW...");
playThread.notify();
}
}
That's it.I hope this help you. 就是这样。我希望这对你有所帮助。
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