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JApplet in browser (IE)

 
Vishakha Ahuja
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Posts: 191
posted 20 years ago
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Hi,
I've a JApplet that runs fine in appletviewer.
I used HTML converter to convert HTML applet tag into object tag result:
<html>
<body>
<!--"CONVERTED_APPLET"-->
<!-- CONVERTER VERSION 1.0 -->
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 250 HEIGHT = 150 codebase="http://java.sun.com/products/plugin/1.1.1/jinstall-111-win32.cab#Version=1,1,1,0">
<PARAM NAME = CODE VALUE = "JLabelDemo.class" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.1">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.1" java_CODE = "JLabelDemo.class" WIDTH = 250 HEIGHT = 150 pluginspage="http://java.sun.com/products/plugin/1.1.1/plugin-install.html"><NOEMBED></COMMENT>
</NOEMBED></EMBED>
</OBJECT>
<!--
<APPLET CODE = "JLabelDemo.class" WIDTH = 250 HEIGHT = 150 >

</APPLET>
-->
<!--"END_CONVERTED_APPLET"-->
</body>
</html>
And I've java plug-in 1.3.1_02 which came with jre. I've followed all instructions for setup.
When I run converted html file in IE 5.5 I get
"applet not initialized" in status bar and the following error in Java console:
java.security.AccessControlException: access denied (java.io.FilePermission france.gif read) at java.security.AccessControlContext.checkPermission(Unknown Source) at java.security.AccessController.checkPermission(Unknown Source) at java.lang.SecurityManager.checkPermission(Unknown Source) at java.lang.SecurityManager.checkRead(Unknown Source) at sun.awt.SunToolkit.getImageFromHash(Unknown Source) at sun.awt.SunToolkit.getImage(Unknown Source) at javax.swing.ImageIcon.<init>(Unknown Source) at javax.swing.ImageIcon.<init>(Unknown Source) at JLabelDemo.init(JLabelDemo.java:15) at sun.applet.AppletPanel.run(Unknown Source) at java.lang.Thread.run(Unknown Source)
what can I do ? ???
[ March 10, 2002: Message edited by: Vishakha Ahuja ]
 
Manfred Leonhardt
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Posts: 1492
posted 20 years ago
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Hi Vishakha,
Applets are not allowed to read from the local file system. You will need to sign your applet in order for the user to give your applet permission to do so. Another alternative is to place the image file onto your server in the same directory where your HTML file is located and get it:
getImage( url );
Regards,
Manfred.
 
Vishakha Ahuja
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Posts: 191
posted 20 years ago
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Hi Manfred,
My applet is actually not reading any local files nor is it loading any images. The HTML file is auto generated by HTML Converter and I do not understand the object,embed tags etc.
Can I make some changes to this HTML file to load the applet without causing permission/security problems ?
[ March 11, 2002: Message edited by: Vishakha Ahuja ]
 
Manfred Leonhardt
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Posts: 1492
posted 20 years ago
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Hi Vishakha,
The applet is trying to load an image file named:
france.gif
If you are trying to use it as a label icon or something else you could try and remove it and the applet might load.
Regards,
Manfred.
 
Vishakha Ahuja
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Posts: 191
posted 20 years ago
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I'm sorry, I overlooked it as it was the "image" was a parameter in the constructor.
Anyway what changes can I make to this HTML file to load the applet without causing permission/security problems ?
 
Manfred Leonhardt
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Posts: 1492
posted 20 years ago
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Hi Vishakha,
Applets are not allowed to read from the local file system. You will need to sign your applet in order for the user to give your applet permission to do so. Another alternative is to place the image file onto your server in the same directory where your HTML file is located and get it:
getImage( url );
Regards,
Manfred.
 
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