Launch Jar from in application

[hardcorebadger]

Hi, I need to launch a jar, or use classes within the jar, whichever is easier, from within an application. Is there any way to do this? Basically I have one application that is a jar, and in that I need to run an executable jar that is located somewhere on the computer. If it is easier, I need to run the main for a class within that jar. Any help would be greatly appreciated.

[doWhile]

If you want to just run the jar as an external task, use Runtime.exec. If you need access to the classes in the jar, add the jar to your classpath.

[hardcorebadger]

I dont need to access the classes, its an executable jar, so runtime.exec will run that? if so what would be the code?

[goldest]

Do you mean to say that you have got everything bundled inside the JAR file and you need to run that?

You can use the -jar command line option. Something like,

java -jar jar-file

Make sure that your jar file contains the manifest file which has the application's entry point defined properly. Like,

Main-Class: classname

where classname is the class file having the main method.

Hope that helps,

Goldest