how to close a java frame with threads

awt, frame, java, multithreading

Solution

in your frame start a new thread and pass to it your frame instance, and after a specific period of time close it.

class MyThread extends Thread {

  private JFrame frame;
  //-- getters and setters for frame

  public void run() {
    Thread.sleep(1000); //close the frame after 1 second.
    frame.close();
  }

}

and in your JFrame class, in the constructor specifically put the following line of code:

MyThread th = new MyThread();
th.setFrame(this);
th.start();

Problem

I have a java frame that I want to close it automatically after 3 or 4 seconds. I found out I must used threads. but I dont know how exactly to do it, this a dumy part of my code : ``` package intro; import java.awt.*; import java.io.IOException; //import view.LangMenu; public class IntroClass extends Frame { private int _screenWidth = 0; private int _screenHeight = 0; private int _screenCenterx = 0; private int _screenCentery = 0; //private static final String SOUND_PATH="/sounds/introSound.midi"; public IntroClass() { Toolkit thisScreen = Toolkit.getDefaultToolkit(); Dimension thisScrrensize = thisScreen.getScreenSize(); _screenWidth = thisScrrensize.width; _screenHeight = thisScrrensize.height; _screenCenterx = _screenWidth / 2; _screenCentery = _screenHeight / 2; setBackground(Color.pink); Label lbl = new Label("Welcome To Dots Game. Samaneh Khaleghi", Label.CENTER); add(lbl); setUndecorated(true); setLocation((_screenCenterx*50)/100,_screenCentery-(_screenCentery*50)/100); setSize((_screenWidth * 50) / 100, (_screenHeight * 50) / 100); WaitClass r = new WaitClass(); r.start(); view.DotsBoardFrame d=new view.DotsBoardFrame(); main.Main.showScreen(d); } class WaitClass extends Thread { boolean running = true; public void run() { while (running) { try { Thread.sleep(50); } catch (InterruptedException ex) { ex.printStackTrace(); } } } } } ```

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