Help with newb-project much appreciated

[barr]

Hi, I'm quite new to java and have never done any applets before.

Now I need to create a fileupload-applet för my webpage. I guess I'm into some serious learning by trial-and-error and I need it done by 12/12 :p

Anyhow, I've managed to get a HelloWorld applet up and running, and now I need to learn how to communicate with servers and send files. A google search mostly ends up in ads for fileupload-applets, so I thought I'd try this forum out.

Is there any good tutorials for java/server communications, or can anyone here show me some examples?

The book I've got, Java Software Solutions, does unfortunately not adress these things...

[CJSLMAN]

Some helpful links:

• Java:
  
• The Java™ Tutorials
• Java Platform SE 6 API

[barr]

Thank you, I wasn't aware of that sun had those basic tutorials. Neat.

Question: Is there a way for the applet to know it's location on the server?

For example, the applet is located at "htp://mydomain.com/scripts/applet/", and I want to connect with a php-file in the same folder.

So instead of:

URL  requestHandler = new URL("htp://mydomain.com/scripts/applet/requestHandler.php");

Can I do something like this?

URL appletLocation = *get the location of the applet*;
URL requestHandler = new URL(appletLocation, "requestHandler.php");

[xcallmejudasx]

Java 2 Platform SE 5.0 look at the getPath(), getHost() etc methods. I think those may be what you want

[barr]

Java 2 Platform SE 5.0 look at the getPath(), getHost() etc methods. I think those may be what you want

Thanks, I found the getCodeBase() that seems to be what I want.

*********************

Now I'm working with the interface, and I have a problem with the following code:

public class gallery{
		JLabel title = new JLabel("Gallery");
		public void show(){
			contentPanel.removeAll();
			contentPanel.add(title, BorderLayout.NORTH);
			contentPanel.add(text, BorderLayout.CENTER);
			
		}
	}
	
	public class uploader{
		JLabel title = new JLabel("Uploader");
		public void show(){
			contentPanel.removeAll();
			contentPanel.add(title, BorderLayout.NORTH);
			contentPanel.add(text, BorderLayout.CENTER);
			
		}
	}

I have two buttons, one for uploading and one for browsing. The event handlers for the buttons sets the JLabel text to a string returned from a php-page that returns time(), and calls uploader.show() resp. browser.show(), that clears the contentPanel and adds it's own content.

However, the JLabel title only changes the first time I press a button, if I first press the button "upload", the title changes to Uploader, and if I then press "Browse", the title changes to "Gallery". But after that, the title don't change anymore. But the JLabel text change each time I press a button.

How can this be?

[xcallmejudasx]

I'm not familiar with JLabel or contentPanel but I think it may be something to do with add. Is there a set or clear method available? The way I picture any add method working is to actually add some object, not just change the text of the object, which is why I think you may need to contentPanel.set() or something.

Have you tried clearing the title right after the button is pressed and then re-writing the title again over it?

[barr]

Thanx, I found out that contentPanel.validate() solved my problem.

[barr]

I've come to the point where a can send and recieve http-requests, but I'm doing something wrong.

POST /info.php HTTP/1.1
Host: mypage.com
Connection: Keep-Alive
Content-Type: multipart/form-data; boundary=gismoquack
Content-Length: 158


--gismoquack
content-disposition: form-data; name="id"

user
--qismoquack
content-disposition: form-data; name="filename"

test.jpg
--qismoquack--

info.php checks if "id" and "filename" is posted, but it says that only "id" is posted.

Can you see what I've done wrong?