import java.applet.*;
import java.awt.*;
public class appletanimator2 extends Applet implements Runnable {
public Thread animationthread = null;
//"maxitems" will be used to indicate the number of
//images that exist.
int maxitems=0;
//"sleeptime" indicates the delay between each image
//in milliseconds.
int sleeptime=0;
Image images[];
int currentimage=0;
public void init()
{
//Get the value of the parameter "maxitems"
//with the number base 10.
maxitems=getIntegerParameter("maxitems",10);
//Get the value of the parameter "sleeptime".
sleeptime=getIntegerParameter("sleeptime",10);
//The array "images" will have "maxitems" number
//of elements.
images=new Image[maxitems];
MediaTracker tracker=new MediaTracker(this);
for (int i=0; i<maxitems; i++)
{
//The following line will read the values of the
//parameters "image0", "image1", "image2" and so on
//up to the value that maxitems indicates. It will also
//use the strings to load the files specified in those
//parameters.
images[i]=getImage(getDocumentBase()
,getParameter("image"+i));
//The ID number for each image must be increased
//for each image you add to the tracker.
tracker.addImage(images[i],i);
}
//Finally we make sure that the tracker loads the images.
try {tracker.waitForAll();}
catch(InterruptedException e)
{
System.out.println("Something happened while reading images...");
}
}
public int getIntegerParameter(String name, int base)
{
String value=getParameter(name);
int intvalue;
try {intvalue=Integer.parseInt(value,base);}
catch (NumberFormatException e) {return 0;}
return intvalue;
}
public void start()
{
if (animationthread == null)
{
animationthread = new Thread(this,"animationthread");
animationthread.start();
}
}
public void stop()
{
if ((animationthread != null) && animationthread.isAlive())
animationthread.stop();
animationthread = null;
}
public synchronized void paint(Graphics g)
{
//The integer "currentimage" is used as index
//for the "images" array.
g.drawImage(images[currentimage],0,0,this);
}
public void update(Graphics g)
{
paint(g);
}
public void run()
{
while (true)
{
update(getGraphics());
//"currentimage" is increased so that the next
//image is displayed in the next screen update.
currentimage++;
//However it must not exceed the value
//of maxitems minus 1.
if (currentimage>maxitems-1) currentimage=0;
//The variable sleeptime sets
//the delay in milliseconds.
try {Thread.sleep(sleeptime);}
catch(InterruptedException e) {}
}
}
}
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