Need a Solution

I have an old applet which loads image. What can be done to increase the refresh rate? I know it contains some deprecated methods of Thread class. What can be done to stop using those methods?
Here is source code. Can someone update it to increase the refresh rate and get rid of the deprecated methods?
Thanks.

import java.awt.*;
import java.applet.*;
import java.net.*;
// Variables:
// Trace - trace control
// URL - Url for image
// Interval update interval
public class JavaCam extends Applet implements Runnable
{
booleanboolean_Debug;// Debugging enabled/disabled
Imageimage_WebcamImage;// Image from Webcam32
Threadthread_This;// Thread for refreshing image
intint_Interval;// Interval between image refreshes ...
public static void main(String args[])
{
System.out.println("Webcam32's JavaCam: V1.1");
}
public void trace(String message)
{
if (boolean_Debug)
{
System.out.println(message);
}
}
public void destroy()
{
trace("Applet.destroy() called");
thread_This.stop();
}
public void start()
{
trace("Start called");
thread_This.resume();
}
public void stop()
{
trace("Stop called");
thread_This.suspend();
}
public void run()
{
trace("run(): Thread started!");
while (true)
{
try
{
// Put the refresh thread to sleep for the supplied interval
Thread.sleep(int_Interval*1000);

trace("Flushing image");
// Flush the image in the image buffer so we get a new one
image_WebcamImage.flush();
// Track the image and wait till its loaded
MediaTracker mediaTracker_track = new MediaTracker(this);
mediaTracker_track.addImage(image_WebcamImage, 1);
mediaTracker_track.waitForID(1);
// Repaint the image
repaint();
}
catch (Exception e)
{
trace("Caught:"+e.toString());
}
}
}
public void init()
{
Stringstring_Url;
URLurl_Webcam;
intint_Port;
boolean_Debug = false;
if (getParameter("Trace") != null)
{
boolean_Debug = true;
}

trace("Init called");
string_Url = getParameter("URL");
if (string_Url == null)
{
showStatus("No URL for Webcam32 image supplied");
return;
}
try
{
int_Interval = Integer.parseInt(getParameter("Interval"));
}
catch (Exception e)
{
// Format exception ... default interval 30
int_Interval = 30;
}
trace("Refresh interval="+int_Interval);

try
{
url_Webcam = new URL(string_Url);
trace("Target URL="+url_Webcam.toString());
image_WebcamImage = getImage(url_Webcam);
MediaTracker mediaTracker_track = new MediaTracker(this);
mediaTracker_track.addImage(image_WebcamImage, 1);
mediaTracker_track.waitForID(1);
}
catch(Exception e)
{
trace("Image get exception:"+e.toString());
showStatus("Problem getting initial image: "+e.toString());
return;
}
/*
int int_Width = image_WebcamImage.getWidth(this);
int int_Height = image_WebcamImage.getHeight(this);
trace("width="+int_Width+" height="+int_Height);
resize(int_Width, int_Height);
*/
// Create and start the new thread initially suspended
thread_This = new Thread(this);
thread_This.suspend();
thread_This.start();
}
public void paint(Graphics g)
{
trace("paint()");
if (image_WebcamImage != null)
{
g.drawImage(image_WebcamImage, 0,0, this);
}
}

}

Sarah if you want a better response, maybe you should try posting this in the Applet or one of the Java In General forums

As this forum is only related to questions on the SCJP Exam

Right, I'm moving this to the Applet forum.

Gee I'd like to help, but I don't know to which of the FIVE

forums in which you posted this exact same question I should respond. :roll:
[ February 26, 2002: Message edited by: Rob Ross ]

Why don't you reply here if you know?
Thanks.

As to increasing the refresh rate, why don't you not sleep for a second in your loop? that seems like it would certainly speed things up.
As for suspend/resume, well you can just stop using them. If you want to get the same effect in your thread, you could add a global variable to the class like "sleep", and set this to true when your applet gets a stop() event. In your image thread, you can check for this boolean in your loop and when it's true, you call sleep(0); that will have the same effect as suspend(). Then in your start() method, you can call interrupt() on the image thread, which will wake it up, similar to resume.
Another way to design this is to have an image thread just continuously get the image and save it to a buffer, then set a global boolean to true, and another repaint thread that continuously checks this boolean, and when it's true:
1. sets it to false
2. copies the buffer to your image area and calls repaint. That way the image is only refreshed when there is a new image to paint.
[ February 26, 2002: Message edited by: Rob Ross ]

Thanks Rob for the reply. Can you please change the code so that it does what you are suggesting?
Thanks a lot.

No, sorry. You should be able to do it yourself though with the information I have given you.
Good luck!
[ February 26, 2002: Message edited by: Rob Ross ]