[1032] in java-interest
Re: stand-alone apps
daemon@ATHENA.MIT.EDU (Paul Beerkens)
Thu Aug 17 07:31:51 1995
From: Paul Beerkens <beerkens@prl.philips.co.uk>
Date: Thu, 17 Aug 1995 08:55:29 +0100
To: hodgesc@rockie.nsc.com
Cc: java-interest@java.sun.com
Hello Chris,
I know it is al very confusing, mainly because there is no documentation availible especcialy on stand-alone applications.
The program I send you contains two parts. The first part (GraphicsTest) contains a stand-alone Runable object (called GraphicsTest), the second part contains an object that runs as a thread (multitasking) but does nothing (because I didn't implement anything to do).
A basic java stand alone application has one object that contains a main function (has to be static). This object starts up the application. That is all it does.
But lets concentrate first on the graphics part.
class GraphicsTest {
static awt.Graphics MyGraphics;
public static void main (String argv [])
{
awt.WServer MyWServer=new awt.WServer ();
MyWServer.start ();
// Create our own windows server
Window MyWindow;
// create a variable that can contain an window
Frame MyFrame;
// create a variable that can contain a frame
MyFrame=new Frame (MyWServer,true,false,null,300,300,Color.gray);
MyFrame.setTitle ("Graphics Test Frame");
// create a frame in MyWServer with backgroundcolor gray
MyWindow=new Window ( MyFrame,"Center",Color.white,200,200);
// create a window in MyFrame with backgroundcolor white
// a window can contain graphical objects
// if you use "Center" than the size of the window will be acording to the size
// of the frame. If you resize the frame the size of the window will change
// aswell. Try out "Left", this gives a different effect. As fas as I know this
// is not documented. Maybe there are other options
MyGraphics = new Graphics (MyWindow);
// Create a new Graphics object in MyWindow. This can contain boxes, text etc..
MyFrame.map ();
// Update MyFrame (several objects like MyGraphics have been added)
for (int c=1;c++<1000;);
// wait till everything is setup proparly
// normaly you don't have to do this because you do all the drawing in other
// threads (obbject running) and it will take long enhough to set them up
MyGraphics.setForeground (Color.black);
//set draw color
MyGraphics.fillRect (40,40,10,10);
// draw black box
MyGraphics.drawString ("test",10,10);
//draw string
};
};
Just play around with this program to get a better feel about what it does.
Paul
>
> Paul,
>
> Sorry to bother you. I was trying to run the code you sent out
> to open a window and draw in it....I dont think Im getting the expected
> results .
>
> After compiling I run 'java GraphicsTest' and get a window
> and then the word "Test" show up on the command line.
>
> When I run 'java GraphicsOutput' I get
> 'In class GraphicsOutput: void main(String argv[]) is not defined'
>
> As you can tell, I really have no idea what Im doing :) But, I would
> like to figure this stuff out so Im hoping you can tell me what
> what your code is supposed to do.
>
> Much thanks.
>
> Regards,
> Chris
>
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