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How to make up several java file to one *.jar file ? with programing

 
Greenhorn
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Like the title,I have a project with serveral java file, then I want to make up them to one *.jar file with programing.
I have put the serveral java files into one File(AlimonyGather), and use commands "jar cvf A.jar AlimonyGather "
But the A.jar warning that "Failed to load Main-Class".
 
Rancher
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If you are using Java 6, you can use the entrypoint flag (e) to specify the main class. Otherwise you will have to create a manifest file in your jar file. Here's a tutorial http://download.oracle.com/javase/tutorial/deployment/jar/appman.html that describes both.
 
Saloon Keeper
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First of all, your class path is at the top level. Therefore, you should add your top level package folder to your Jar.
AlimonyGather doesn't look like a package name.

Let's say your main class is com.example.alimony.Main.

Then try this:

jar -cfe A.jar com.example.alimony.Main com/example/alimony
 
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