replacing thread with timer

[hwoarang69]

	//###########################################################################################################
	/*** 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.

[Norm]

run method it is thread method.

The run() method can be used by any code. It doesn't belong only to a thread.

[hwoarang69]

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

[Norm]

What does the API doc say is needed for the Timer class you are using?

[hwoarang69]

what is api?

[Norm]

Here's a link to the API doc:
Java Platform SE 7

[hwoarang69]

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

[Norm]

The most commonly used timers are in the java.util and the javax.swing packages.

[hwoarang69]

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();
			}
}

[Norm]

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

I'm done for tonight. Back tomorrow.

[hwoarang69]

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

[Norm]

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.