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Hi all,
I installed jdk 6_23 and set the path of jdk in system path properly. And then I could run any jar file by command line, but when i double-clicked on the jar file, a message of Java Virtual Machine Launcher occured : " could not find the main class ... Program will exit". I have check the manifest file of the jar file, it totally ok (so, it could execute by command line).
I am using windows 7. I tested with SwingSet2 demo, with another one, the result was too.
Anyone can help me ?
Thx in advanced.

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Last Post by __avd
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If the "Main-Class" attribute is specified in the jar manifest, then you shouldn't have any trouble double-clicking it to run.

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If the "Main-Class" attribute is specified in the jar manifest, then you shouldn't have any trouble double-clicking it to run.

Right!! But in my case, it doesn't that. I reinstalled jdk but the problem wasn't solved.
Help me plz!!!

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The launcher error message suggests to me that the file association for .jar files may be giving you
javaw swingset2.jar
when it should be
javaw -jar swingset2.jar

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The launcher error message suggests to me that the file association for .jar files may be giving you
javaw swingset2.jar
when it should be
javaw -jar swingset2.jar

For me, both java -jar SwingSet2.jar or javaw -jar SwingSet2.jar are ok,
but javaw SwingSet2.jar is not ok, it gives a message of Java Virtual Machine Launcher:
"could not find the main class ... Program will exit".
My wish: can execute jar file by double-clicking on it without re-setup my OS.
Thx for reading.

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Java install usually sets the file association for .jar files. I don't know why that's not the case on your machine. Anyway, it only takes a minute to fix the file association so it has the -jar option specified - certainly NOT a re-setup of the OS!

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Java install usually sets the file association for .jar files. I don't know why that's not the case on your machine. Anyway, it only takes a minute to fix the file association so it has the -jar option specified - certainly NOT a re-setup of the OS!

Guide me your way, plz
Thks.

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