Execute a jar inside another jar in java

Question

I have an executable jar(mainjar) with me, i have created it using a maven project. When i pass some argument to his jar, it will execute another jar(execjar) file which is placed inside the src/main/resource of mainjar. The problem is i am not able to access the execjar inside the mainjar. Here is my folder structure of mainjar

src/main/java
    MainClass
        code to execute execjar- 'java -jar execjar'
src/main/resource/
    execjar

The problem is when i package the mainjar using maven assembly plugin, i am not able to access the execjar inside the mainjar- nothing happens when i execute the mainjar.

Can anyone help ?

If you want to call java code from java code, you don't need to call `java` — Scary Wombat, May 08 '14 at 08:18
??? Why don't you instantiate the Main class of the execjar Manifest and execute it that way? — mwhs, May 08 '14 at 08:20
yes, i understand , but the requirement is to create a utility(mainjar) hiding the details of the jar (execjar) which is being executed inside it — Parameswar, May 08 '14 at 08:20
Have a look at [this post](http://stackoverflow.com/questions/12357136/reference-jars-inside-a-jar), apparently it's not possible. — Karolis Šarapnickis, May 08 '14 at 08:25
i added the execjar to the build path, i am able to access its mainclass in the mainjar. But i am not able to package the mainjar , it says the class not found — Parameswar, May 08 '14 at 08:37

score 0 · Answer 1 · answered May 08 '14 at 08:59

0

Look at the shade plugin to create an uberjar instead.

http://maven.apache.org/plugins/maven-shade-plugin/

answered May 08 '14 at 08:59

Niels Bech Nielsen

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is it enough to add the src/main/resources/execjar execjar.jar – Parameswar May 08 '14 at 12:32
try it out. You are in a better position to test whether it works as intended.. However, I doubt you comprehend. – Niels Bech Nielsen May 09 '14 at 06:37

Execute a jar inside another jar in java

1 Answers1