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  1. #1
    nishant.4545 is offline Member
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    Jul 2009
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    Default problem with applet execution

    I have made an applet that opens notepad. The code is:
    Java Code:
    import java.applet.*;
    import java.awt.*;
    public class Note extends Applet{
     public void paint(Graphics g) {
    g.drawString("Open a notepad",50,10);
     Runtime r=Runtime.getRuntime();
        	 Process p=null;
    }catch(Exception e){
    Then I have created its jar file using the command

    jar cvf Note.jar Note.class

    Then I signed this jar file using keytool to give it necessary permisiions using following commands:

    keytool -genkey -alias Note -validity 365
    jarsigner Note.jar Note

    Then I created an html to operate the applet from within the jar file.

    My problem is that as the applet starts it opens several (165) instances of notepad. When I clase all those instances, all the instances appear again.
    plz help me to understand the problem.

  2. #2
    OrangeDog's Avatar
    OrangeDog is offline Senior Member
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    Jan 2009
    Cambridge, UK
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    Your code is called every single time the applet redraws, as you put it in the paint() method. Try somewhere else. Maybe when the applet starts, or when you press a button?
    Don't forget to mark threads as [SOLVED] and give reps to helpful posts.
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  3. #3
    Fubarable's Avatar
    Fubarable is offline Moderator
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    Jun 2008
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    Never do that sort of thing from within a paint method. You have very little control of when or even if the paint method will be called. Instead do this in a non-paint method or constructor.

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