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Thread: applets in package

  1. #1
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    Default applets in package

    I am learning applets and am having a problem (I am sure is very simple for most of you).
    Whenever i put the applet in a namespace (package), i can't run it.
    package javaboard; /*without this it works*/
     
    import java.applet.*;
    import java.awt.*;
     
    public class AppletBoard extends Applet {
    	public void paint(Graphics g){
    		g.drawString("Hello World!",200,100);
    	}
    }
    I tried to create a jar file and modify the class name in the html file but it doesn't work.
    Also before jarring, it didn't work. What am I missing ?

    How do you modify this html
    <html> 
     <applet code="AppletBoard.class" height="300" width="320">
     </applet>
     </html>
    Last edited by dabdi; June 14th, 2011 at 06:39 PM.


  2. #2
    Administrator copeg's Avatar
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    Default Re: applets in package

    Make sure the directory structure that your code resides parallels the package structure you have created. Further, when you package an app into a jar you need to maintain this structure.

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: applets in package

    That also applies to the code= attribute. It should refer to the package and class. For example:
    ... code=javaboard.AppletBoard ...

    Leave off the .class as that is not part of the class name.

  4. #4
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    Default Re: applets in package

    Quote Originally Posted by Norm View Post
    That also applies to the code= attribute. It should refer to the package and class. For example:
    ... code=javaboard.AppletBoard ...

    Leave off the .class as that is not part of the class name.
    Thanks for your suggestions. I was using the prefix "javaboard." when testing the jars and it worked as long
    as I didnt put the package javaboard; namespace. But I did not try removing .class extension.
    So far I am having no luck both with and without jarring. Here is my directory structure and error message before jarring
     Directory of C:\Users\Daniel\Desktop\test\javaboard
     
    06/14/2011  08:25 PM    <DIR>          .
    06/14/2011  08:25 PM    <DIR>          ..
    06/14/2011  08:25 PM               385 AppletBoard.class
    06/14/2011  08:22 PM                92 AppletBoard.html
    06/14/2011  07:29 PM               191 AppletBoard.java
                   3 File(s)            668 bytes
                   2 Dir(s)  71,459,155,968 bytes free
     
    C:\Users\Daniel\Desktop\test\javaboard>appletviewer AppletBoard.html
    load: class javaboard.AppletBoard not found.
    java.lang.ClassNotFoundException: javaboard.AppletBoard
            at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:211)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
            at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:144)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
            at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:662)
            at sun.applet.AppletPanel.createApplet(AppletPanel.java:785)
            at sun.applet.AppletPanel.runLoader(AppletPanel.java:714)
            at sun.applet.AppletPanel.run(AppletPanel.java:368)
            at java.lang.Thread.run(Thread.java:662)

  5. #5
    Super Moderator Norm's Avatar
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    Default Re: applets in package

    With the package path, the HTML file should be in the test folder. The browser will look in the javaboard folder for the AppletBoard.class file.

  6. The Following User Says Thank You to Norm For This Useful Post:

    dabdi (June 14th, 2011)

  7. #6
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    Default Re: applets in package

    Thanks a lot! It works now. So easy when you know ...

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