Failed to load Main-Class manifest attribute from TextEditor.jar
Hi, I'm trying to make a JAR file containing a Java application that I can run by double-clicking under windows.
Everything works fine, except I get the error "Failed to load Main-Class manifest attribute from TextEditor.jar"
I have tried to set up my manifest file to contain the Main-Class attribute. Eg:
Manifest-Version: 1.0
Main-Class: texteditor/TextEditorClass.class
But I get the error:
java.io.IOException: invalid manifest format
If I include a Name: header...
Manifest-Version: 1.0
Name: texteditor
Main-Class: texteditor/TextEditorClass.class
...then the manifest is used, (and I can even see my Main-Class attribute within the JAR), but if I double-click the JAR or use "java -jar TextEditor.jar" from an MSDOS prompt, then I still get the error message "Failed to load Main-Class manifest attribute from TextEditor.jar"
I am using Java version "1.2fcs" Classic VM (build JDK-1.2fcs-S, native threads)
How do I get the mainfest to accept the Main-Class attribute?
thanks,
Tim
[1137 byte] By [
TimRyan] at [2007-9-26 2:14:54]
Thanks for the reply Kurt.
Unfortunately I still get the same error. I have actually tried all sorts of combinations of the file with and without "Name:" and with and without .class.
I must admit I never tried it with the Name line second like you showed, but I have now, and it gives me the same old "invalid manifest format" message.
I was wondering if somehow I've ended up with an old version of JAR that cannot handle the Main-Class attribute. The problem is that unlike JAVA, JAR won't tell you what version it is. Any ideas how I might prove I'm running the latest version of JAR? Mind you, I get the same problem at home and at work, and my work version is the latest GenRel one so I think this is pretty unlikely.
Ahhhh, I've sussed it.
It would seen that JAR doesn't work very well unless your Manifest file name is Manifest.mf. In desperation when I started getting bl**dy zip I/O errors from changing around my manifest file content, I changed it to Manifest.mf, and guess what, it worked first time!!!
Yay! Yay! Yay! God I can't believe it has taken so long to solve this one.
In fact my manifest file is now simply:
Main-Class: texteditor.TextEditorClass
and everything works perfectly.
Thanks for replying anyway Kurt - you might as well have the Duke Dollars.
