JAR Files and Applets with Java Plug-In

This seems to be a basic question, but I can't figure it out! I have a jar file that contains all my class files for my applet. The jar file is in the same directory as the following html file:
<html>
<body>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 700 HEIGHT = 510 codebase="http://java.sun.com/products/plugin/1.3.1/jinstall-131-win32.cab#Version=1,3,1,0">
<PARAM NAME = ARCHIVE VALUE = "myFiles.jar" >
<PARAM NAME = CODE VALUE = "MainView.class" >
<PARAM NAME="type" VALUE="application/x-java-applet;jpi-version=1.3.1">
<PARAM NAME="scriptable" VALUE="false">
</OBJECT>
</body>
</html>
I've checked the jar file, it's the same name. MainView.class is most certainly in the jar file - yet everytime I open the page up, I get the class not found error:
java.lang.ClassNotFoundException: java.io.FileNotFoundException
MainView.class (The system cannot find the file specified)
If I don't jar the files, the applet works fine - but I want to jar them as it's some 20 class files. What am I doing wrong?

I've had a similar problem where it pops up the Java Extension Installation window, and starts downloading. Everything appears normal, but when it tries to run the applet it gets "load: class <className> not found" where <className> is the name of the class in my CODE parameter.
It appears that on occasion the download of the jar gets cut off. When I searched the browser's cache, I find a jar file that has fewer bytes than it should. In order to initiate a retry, you have to delete the jar file from your browser's cache, close all your browser windows so that the Plug-in with its truncated jar file stops running, and load the HTML page again. It appears that it checks the timestamp of the jar file in your cache and the one on the server and decides that it doesn't need to download it again. But if you delete it from your cache, it forces a retry.
I never have this problem when I open from my hard drive. I've never had the problem with a cable modem connection. I've had it once from a corporate LAN hitting an internet server (ie., outside corporate WAN). I've had people report the problem with dial-up connections. My theory is that whatever Sun is using to download the applet is more sensitive than either HTTP download or FTP.
Has anybody else experienced this problem? Is there anything you can do about it? I couldn't find a bug report on it. Is there one?

Similar Messages

  • Jar files and applet

    My applet class is using other classes in my package,
    So do i need to create a jar file and specify that jar file in <applet archieve = :myjar.jar"
    I did created the jar file , but its not loading up, the browser just says Loading java applet, what might be the reason, does it depends on size of jar file?
    or my tags are wrong.
    my applet tag is
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    <applet archive = "myjar.jar"
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    width.. >
    the front.class file is also in myjar.jar.
    Any help....
    Also one more question,
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    I have a gui, when a particular button is clicked on applet
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    And in my applet class i am using one other class from my package which actually coonects to databse through JDBC. now say i have a button on my applet whihc says "Connect", and when that button is clicked then I created object of my other class which makes connection
    through databse. So will this work from applet?
    Thanks

    You didn't show all of your applet tag, but it should look like this:
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    </HTML>
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  • JAR files and Applets

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  • .jar file only works with 'java -jar'

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  • JAR file and applets...

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  • Jar files and JApplet

    My applet class is using other classes in my package,
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    my applet tag is
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    Also one more question,
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    my applet tag is
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    >
    Can i call other applets within one applet class.
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    Here's the verbose-mode description of what I did.
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    aggiunta in corso di: client/ClientForm$4.class(in = 686) (out= 380)(compresso 44%)
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    aggiunta in corso di: client/ScorciatoieDialog.java(in = 5676) (out= 1222)(compresso 78%)
    jar umf mainclass.txt client.jar[NOTE: mainclass.txt only contains the line "Main-Class: client.Client"]
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    I've also tried to manually create a MANIFEST.MF file that only contained the following lines:
    Manifest Version: 1.0
    Main-Class: client.Client
    guess what was the result?
    java -jar client.jarException in thread "main" java.io.IOException: invalid manifest format
    at java.util.jar.Manifest.read(Manifest.java:193)
    at java.util.jar.Manifest.<init>(Manifest.java:52)
    at java.util.jar.JarFile.getManifest(JarFile.java:158)
    >
    the same procedure with the addition of "Name: client/" before the main-class attribute generated the usual "Failed to load Main-Class manifest attribute" result. So now what?!? I'm getting crazy....

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    Thank you for your reply.
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