Java Applets

[richcash]

I'm trying to learn Java applets from my textbook and I'm a super-beginner, but the textbook is really horrible.
Can anyone anyone tell me what to do with this code?

code:

import java.awt.*; import java.applet.*; public class Shapes_Color extends Applet {         public void paint (Graphics g) {                 setBackground (Color.darkGray);                 g.setColor (Color.pink);                 g.drawRect (50, 50, 40, 40);                 g.setColor (Color.blue);                 g.fillRect (100, 100, 150, 150);                 g.setColor (Color.green);                 g.drawLine (20, 20, 300, 20);                 g.setColor (Color.red);                 g.fillOval (250, 250, 50, 50);         } }

I tried compiling it and opening the class file (don't laugh!), but that did nothing. I also tried running it like a normal java program, but obviously it didn't work. I have no idea how to execute this code. It's supposed t draw stuff in an applet. Thanks in advance!

[wtd]

You will either need to embed it in an HTML page, or open it using the appletviewer program distributed with the Java Development Kit.

While we're at it, let's adhere to a more standard formatting.

code:

import java.awt.*; import java.applet.*; public class ShapesColor extends Applet {    public void paint(Graphics g) {       setBackground(Color.darkGray);       g.setColor(Color.pink);       g.drawRect(50, 50, 40, 40);       g.setColor(Color.blue);       g.fillRect(100, 100, 150, 150);       g.setColor(Color.green);       g.drawLine(20, 20, 300, 20);       g.setColor(Color.red);       g.fillOval(250, 250, 50, 50);    } }

[richcash]

wtd wrote:

embed it in an HTML page

Could you tell me how to? I've tried to put it in every tag I know. Is there some special way to embed something?

wtd wrote:

or open it using the appletviewer program

The appletViewer in the bin? How do I open something with it (and do I open the .class file)?

[wtd]

richcash wrote:

wtd wrote:

embed it in an HTML page

Could you tell me how to?

Better yet, Google "applet html".

[richcash]

Oh, thanks for the help. The applet tag, how obvious!

[[Gandalf]]

As for running something using appletviewer use:

Quote:

appletviewer program.class

Instead of:

Quote:

java program.class

[richcash]

Oh, that's how you do it. Thanks.
It doesn't work for me, for some reason. When I execute it, nothing happens (there's not even an error message). Do I have to set new environment variables (or was it included with the java ones)?

[McKenzie]

Your Java is fine. Post the HTML you are using.

[[Gandalf]]

Yeah, oops, it should be:

Quote:

appletviewer applet.html

Where applet.html has the applet embedded in it.

[richcash]

Oooh! I never thought to try that, lol. Now it works, thanks everyone for the help!

[richcash]

I should have asked this a long time ago, but I'm wondering why when you make an applet in Java like this you don't need the main method (and why the program doesn't start from the main method)? Isn't it still Java?
Sorry for the double post, but I didn't want to make a new topic.

[[Gandalf]]

Yes it is, it only has a different entry point. I forget exactly how it goes, but google should have the answer. Something like this.

[richcash]

Ok, I think I get it. Thanks!

[richcash]

This also has to do with applets.
I got the following code from a website :

code:

import java.applet.*; import java.awt.*; public class DrawingLines extends Applet {    int width, height;    public void paint( Graphics g ) {       g.setColor( Color.green );       for ( int i = 0; i < 10; ++i ) {          g.drawLine( width, height, i * width / 10, 0 );       }    } }

It doesn't seem to make a difference when I initialize the height and width variables, is this because those variables are set to values equal to the hieght and width of the applet in the html? If so, why (where's the assignment of the variables)?
Also, even when I change the value of height and width inside the for loop it doesn't make a difference (or is it just that I'm not noticing a difference)?

[wtd]

Look for things like:

code:

<PARAM NAME=TEXT VALUE="Hi There">