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Thread: replacing thread with timer

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    Default replacing thread with timer

    	//###########################################################################################################
    	/*** stat method ***/
    	public void start()
    	{
    		Thread thread = new Thread(this); //set up thread
    		thread.start();                   //start thread jump inside run method
    	}/*** end of start method ***/
     
     
    	//###########################################################################################################
    	/*** run method ***/
    	public void run()
    	{
     
    		while(true) //main game loop
    		{
    			//move image here
    			x += dx;
     
    			if(x+width >= getWidth())
    			{
    				x -= dx;
    			}
     
    			repaint();
     
    			try
    			{
    				Thread.sleep(17);
    			}
    			catch(InterruptedException e)
    			{
    				e.printStackTrace();
    			}
    		}//end of while loop
    	}/*** end of run method ***/



    i want to keep same structure but replacing thread with timer.


    in start method i can set and start timer.
    public void start()
    	{
    		Timer timer = new Timer(17,this); 
    		timer.start();                  
    	}/*** end of start method ***/

    but not sure about run method bc run method it is thread method.


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    Default Re: replacing thread with timer

    run method it is thread method.
    The run() method can be used by any code. It doesn't belong only to a thread.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: replacing thread with timer

    for thread i was implements Runnable. but with timer do i use TimerTask ?

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    Default Re: replacing thread with timer

    What does the API doc say is needed for the Timer class you are using?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: replacing thread with timer

    what is api?

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    Default Re: replacing thread with timer

    Here's a link to the API doc:
    Java Platform SE 7
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    Default Re: replacing thread with timer

    i look under javax.management.timer but i didnt see it what iam looking for. am i missing some thing?

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    Default Re: replacing thread with timer

    The most commonly used timers are in the java.util and the javax.swing packages.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: replacing thread with timer

    just want to make sure. if you use timer than u replace run() method with
    public void actionPerformed(ActionEvent e)? for ex

    public void actionPerformed(ActionEvent e)
    {
              while(true) //main game loop
    		{
    			//move image here
    			x += dx;
     
    			if(x+width >= getWidth())
    			{
    				x -= dx;
    			}
     
    			repaint();
     
    			try
    			{
    				timer.delay(17);
    			}
    			catch(InterruptedException e)
    			{
    				e.printStackTrace();
    			}
    }

  10. #10
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    Default Re: replacing thread with timer

    Please make a small simple program that compiles, executes and shows the problem.

    I'm done for tonight. Back tomorrow.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: replacing thread with timer

    here try compiling this. as you can see it will flicker. let me know if you know how to fix this problem.



    import java.awt.Graphics;
    import java.awt.Image;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
     
    import javax.swing.JApplet;
    import javax.swing.Timer;
     
     
    public class main extends JApplet  implements ActionListener
    {
    	//player information variable
    	int x = 10;
    	int y = 50;
    	int width = 30;
    	int height = 30;
    	int dx = 1;
     
    	//#####################
    	/*** init method ***/
    	public void init()
    	{
    		setSize(800, 400);
    	}/*** end of init method ***/
     
     
     
    	//#####################
    	/*** stat method ***/
    	public void start()
    	{
    		Timer timer = new Timer(30, this); 
    		timer.start();                  
    	}/*** end of start method ***/
     
     
    	//##########################
    	/*** game loop ***/
    	public void actionPerformed(ActionEvent e)
    	{
    			//move image here
    			x += dx;
     
    			if(x+width >= getWidth())
    			{
    				x -= dx;
    			}
     
    			repaint();
    	}/*** end of run method ***/
     
     
     
     
    	//#################
    	/*** paint method ***/ 
    	public void paint(Graphics g)
    	{	
    		super.paint(g); //redraw paint method. so it doesnt draw on top of each other
     
     
    		g.fillRect(x, y, width, height);   //player	
     
    	}/** end of paint method ***/
    }



    i am think probem might be with my eclipe.


    i have eclipse indigo and runing

    name=Eclipse Platform
    id=org.eclipse.platform
    version=3.7.0

  12. #12
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    Default Re: replacing thread with timer

    Try getting double buffering for the drawing by using a Swing component and the paintComponent() method.

    I get a black square moving to the right when I execute this.
    Not any flicker.
    If you don't understand my answer, don't ignore it, ask a question.

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