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javaprocessjar
Richard Le
Richard Le

Reputation: 669

How to execute a jar executable file and receive the return value

Assume that I have a java program A. The Java program A needs to call another java program B(jar), passes arguments to it and receives the return value from B. How can I achieve this?

Upvotes: 0

Views: 4764

Answers (3)

vinayknl
vinayknl

Reputation: 1252

All we have to do is introduce an entry into the JAR file's manifest (MANIFEST.MF in the JAR's META-INF subdirectory), like

Main-Class: com.tedneward.jars.Hello

All a user has to do to execute the JAR file now is specify its filename on the command-line, via java -jar outapp.jar.

Upvotes: 0

user2221125
user2221125

Reputation: 156

The easiest solution would be to have the jar as a build-time dependency and invoke it statically from your code.

Please check this: How to run a jar file from a separate jar file?

The above is more applicable for you compared to Execute another jar in a java program

Upvotes: 1

clancer
clancer

Reputation: 613

I believe your question is answered here Execute another jar in a java program depending on your runtime environment you may need to specify a path to java and/or the jar file

Upvotes: 0

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