publishing an applet

**Kareem Mesbah** · August 24th, 2012, 03:50 PM

hey guys I am Kareem a new member here.

actually I was trying to publish a simple applet to a web page when I met a problem that the plugin cannot find my class although I put the .jar file in the same path of the html one and this is ma java code:

package mainpackage;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.ImageIcon;
import javax.swing.JApplet;
 
public class ImageMapping extends JApplet {
	private ImageIcon mapImage;
	private static final String captions[] = {"you're on icon number 1","you're on icon number 2","you're on icon number 3",
		"you're on icon number 4","you're on icon number 5",
		"you're on icon number 6","you're on icon number 7"
	};
	public void init () {
		addMouseListener(
				new MouseAdapter() {				
					public void mouseExited (MouseEvent event) {
						showStatus("you're outside the image!");
					}
				}
		);
 
		addMouseMotionListener(
				new MouseMotionAdapter() {
					public void mouseMoved (MouseEvent event) {
						showStatus(translateLocation(event.getX(),event.getY()));
					}
				}	
		);	
		mapImage = new ImageIcon (getClass().getResource("../resource/icons.png"));
	}
	public void paint (Graphics g) {	
		super.paint(g);
		mapImage.paintIcon(this, g, 0, 0)
	}
	public String translateLocation (int x, int y) {	
		if(x >= mapImage.getIconWidth() || y >= mapImage.getIconHeight()){
			return "";
		}
		double iconWidth = mapImage.getIconWidth()/7.0;
		int iconNumber = (int) ((double) x/iconWidth);
		return captions[iconNumber];
	}
}

and this is my html code:

<html> 
<head>
<title> Applet Example </title>
</head>
<body>
<applet code = 
"mainpackage.ImageMapping.class"
width = "606" height "90" archive = 
"imageMaping.jar">
there's an error
</applet>
</body>
</html>

actually I don't know what's wrong with my codes, when I open the web page I just find error: click for details, when I check the details a java window just appears and tells :

Java Plug-in 10.6.2.24
Using JRE version 1.7.0_06-b24 Java HotSpot(TM) Client VM
User home directory = C:\Users\DELL
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

**aussiemcgr** · August 24th, 2012, 04:32 PM

Try this instead in your html applet tag code variable: "mainpackage/ImageMapping.class"

**Kareem Mesbah** · August 24th, 2012, 04:43 PM

Originally Posted by aussiemcgr

Try this instead in your html applet tag code variable: "mainpackage/ImageMapping.class"

I've just tried that and this also does not work with me

**aussiemcgr** · August 24th, 2012, 04:52 PM

Ok, well that is one problem. In the html applet tag, you should use "/" instead of ".", since a jar file is really just a zip folder, and each package has its own folder. Or at least that's the way I have my html code for my apps.
I find it suspicious that you are not receiving any errors in the console. Why do you have the text "there's an error" between your open and close applet tags in your html? I don't know if that would break it or not, just curious.

**Kareem Mesbah** · August 24th, 2012, 05:12 PM

Originally Posted by aussiemcgr

Ok, well that is one problem. In the html applet tag, you should use "/" instead of ".", since a jar file is really just a zip folder, and each package has its own folder. Or at least that's the way I have my html code for my apps.
I find it suspicious that you are not receiving any errors in the console. Why do you have the text "there's an error" between your open and close applet tags in your html? I don't know if that would break it or not, just curious.

this message should appear when the browser does not support my app.

**jps** · August 24th, 2012, 05:46 PM

To elaborate:
Browsers that support the applet tag will(should) place the applet in position and ignore all markup before the closing applet tag.

Browsers that do not support the applet tag will(should) still render the markup between the applet tags. Many times this area is used to assist the user in updating/installing, what ever is necessary for it to run.

**Kareem Mesbah** · August 24th, 2012, 06:14 PM

Originally Posted by jps

To elaborate:
Browsers that support the applet tag will(should) place the applet in position and ignore all markup before the closing applet tag.

Browsers that do not support the applet tag will(should) still render the markup between the applet tags. Many times this area is used to assist the user in updating/installing, what ever is necessary for it to run.

it just draws the area of the applet and shows error: click for details. !

**Norm** · August 24th, 2012, 07:50 PM

Strange there is no error message in the contents of the java console that you posted. Are you sure you copied all of its contents?

Is the class file in the jar file in the mainpackage folder? Use a zip utility to look inside the jar file.

The code= attribute should have the full classname as its value. The classname parts are separated by .s and does not include .class which is part of the filename, not the classname.

**Kareem Mesbah** · August 25th, 2012, 08:24 AM

Originally Posted by Norm

Strange there is no error message in the contents of the java console that you posted. Are you sure you copied all of its contents?

Is the class file in the jar file in the mainpackage folder? Use a zip utility to look inside the jar file.

The code= attribute should have the full classname as its value. The classname parts are separated by .s and does not include .class which is part of the filename, not the classname.

I've noticed that the image does not exist into the jar file also I exported everything, here are you the html code and the jar file included the java code you can try this yourself if you don't mind. (attached)

**Norm** · August 25th, 2012, 08:39 AM

image does not exist into the jar file

Can you put the image in the jar file? That will be better.
Can you post the code and html you are using on the forum?

NOTE: There is a compiler error in the posted code and an error in the posted html page.

**Kareem Mesbah** · August 25th, 2012, 10:23 AM

Originally Posted by Norm

Can you put the image in the jar file? That will be better.
Can you post the code and html you are using on the forum?

NOTE: There is a compiler error in the posted code and an error in the posted html page.

I don't know how to include it into the jar file, I am using eclipes and when exporting I check the box "export generated class files and resources"
about the errors, when I run it from inside eclipse it runs successfully without any problems. please could you tell me what are you code errors you discovered ?

about posting the codes I already posted them in the first post.

**Norm** · August 25th, 2012, 10:36 AM

I copied the code that was posted and it works for me outside of a jar file.
I don't use your IDE and can't help you with it.
Look at the section of the forum for your IDE and see if there are posts that tell how to include files in the jar file the IDE creates.

**Kareem Mesbah** · August 25th, 2012, 03:11 PM

Originally Posted by Norm

I copied the code that was posted and it works for me outside of a jar file.
I don't use your IDE and can't help you with it.
Look at the section of the forum for your IDE and see if there are posts that tell how to include files in the jar file the IDE creates.

please tell me how could you export it without an IDE, I've exported it according to a video tutorial so I don't know what's wrong.

**Norm** · August 25th, 2012, 03:44 PM

What do you mean by "export"? That sounds like a problem with the IDE.
I use a simple editor with a command line where I can issue the javac command. I copy the html to the same folder as the .class file and open it with a browser. The image file is in a folder inside the folder with the .class and the .html files. No IDE.

**Kareem Mesbah** · August 25th, 2012, 03:51 PM

Originally Posted by Norm

What do you mean by "export"? That sounds like a problem with the IDE.
I use a simple editor with a command line where I can issue the javac command. I copy the html to the same folder as the .class file and open it with a browser. The image file is in a folder inside the folder with the .class and the .html files. No IDE.

so you mean that there's no need for the .jar file ?

**Norm** · August 25th, 2012, 03:55 PM

You should use a jar file to hold the class file and the image file. I don't know how to you can tell the IDE to put all the files you need in the jar file.
If all the files are in the jar file, then you must use the correct path to be able to read the image file from the jar file.

**Kareem Mesbah** · August 25th, 2012, 04:00 PM

Originally Posted by Norm

You should use a jar file to hold the class file and the image file. I don't know how to you can tell the IDE to put all the files you need in the jar file.
If all the files are in the jar file, then you must use the correct path to be able to read the image file from the jar file.

got it, thanks for your help

I am gonna look for that. I was just asking how could you generate the .jar file including the image without using IDE ?

**Norm** · August 25th, 2012, 04:08 PM

how could you generate the .jar file including the image without using IDE

I use the jar command. I write a batch file that contains the jar command for any project that needs to be in a jar file.

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