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applet

 
sunanda kadam
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posted 16 years ago
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package myPackage;
import java.applet.*;
import java.awt.*;



public class MyApplet extends Applet
{
public void paint(Graphics g)
{
g.drawString("sunanda", 100 ,100);
}



}


i am getting error as nullpointerException
 
Campbell Ritchie
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posted 16 years ago
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Please post more details, particularly which line your Exception occrus on.
 
sunanda kadam
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Exception in thread "main" java.lang.NullPointerException
at java.awt.Window.init(Unknown Source)
at java.awt.Window.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at java.awt.Frame.<init>(Unknown Source)
at sun.applet.AppletViewer.<init>(Unknown Source)
at sun.applet.StdAppletViewerFactory.createAppletViewer(Unknown Source)
at sun.applet.AppletViewer.parse(Unknown Source)
at sun.applet.AppletViewer.parse(Unknown Source)
at sun.applet.Main.run(Unknown Source)
at sun.applet.Main.main(Unknown Source)
at sun.applet.AppletViewer.main(Unknown Source)
 
Campbell Ritchie
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posted 16 years ago
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Doesn't it give line numbers on your stack trace? Is that all the code you have? Nothing else?

You are supposed to write super.paint(g); before anything else in the paint() method, but I don't think that is the cause of your problem.
 
sunanda kadam
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i am buginner in java.
was trying to execute simple code in eclipse .
 
Campbell Ritchie
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How did you start the application? Did you use "run as"->"Java Applet?" It works all right when I try it on Eclipse.
 
sunanda kadam
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yes i started as java applet
 
Campbell Ritchie
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Is that the whole code? When I tried it on Eclipse it ran first time.
 
sunanda kadam
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sorry to ask you this agian campbell .......

this is the code i am executing
 
sunanda kadam
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starting!
Invalid Menu Extension (Path is invalid): org.objectweb.lomboz.ws.axis.ui.action
s.wsdl2java




This is what i am getting on dos shell
 
Campbell Ritchie
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Have you tried running it elsewhere?

Go through the Java Tutorials.

You find you have to create an html file which will read something like this, in its simplest form:

<html>
<applet code = "myPackage.MyApplet.class" width = "300" height = "150">
</applet>
</html>

Call that file MyApplet.html and save it a folder. Copy your MyApplet class into the same folder. Run it from the command line with these commands

javac -d . myApplet.java
appletviewer MyApplet.html



I have just tried it and got a grey square with "sunanda" written on.

BTW: In future use the javax.swing.JApplet class rather than Applet.
 
Campbell Ritchie
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You have a problem with your Eclipse installation; I am going to shift this thread to what I think is the most appropriate forum. Click on the links above and below this thread to continue.
 
Campbell Ritchie
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Suggest you reinstall Eclipse as a first step. In fact I have neveer installed Eclipse on Windows myself; I simply unzip the installation into a folder, then create a shortcut from desktop to the eclipse.exe program, which you will find in the eclipse folder with the round blue icon.
 
sunanda kadam
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applications are running properly but not the aaplets.
ther might be spme extra settings required for applets to run in eclipse
 
Campbell Ritchie
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You shouldn't need any extra settings to run applets from Eclipse. Suggest you download it again. Got to go now, but shall check later to see how you have got on.
No idea what the bit about org.objectweb means; it is presumably a required class somewhere, but I have never heard of it. If you get really desperate, reinstall Java and check your PATH.
 
Jack Robin
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posted 9 years ago
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is that whole code???
 
Consider Paul's rocket mass heater.
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