Run a .jar file with parameters from JavaScript [duplicate]

Question

Possible Duplicate:
Execute another jar in a java program

I have an executable jar file that accepts two parameters: an input file and an output file:

java -jar inputFile.txt outputFile.txt

How can I call exactly this from JavaScript?

I'm hoping you understand the complete and utter difference between Java and JavaScript. Are you building a website or web application? — Jon Egeland
– Jon Egeland, Commented Aug 6, 2012 at 4:00
I've edited the question so that it makes some sense. If you don't find the edits appropriate, please roll them back. — Blender
– Blender, Commented Aug 6, 2012 at 4:08
@Blender: That changes the meaning of the question. The original was about how to call it from JavaScript, not Java, which is a perfectly reasonable (if uncommon) thing to do. — Mechanical snail
– Mechanical snail, Commented Aug 6, 2012 at 4:40

Community · Accepted Answer · 2017-05-23 12:18:33Z

6

The answer depends on the context.

If your javascript is running in a web browser sandbox, then the answer is that you can't run a JAR file. The sandbox is designed to stop you doing that kind of thing.
If your javascript is running under node.js, then this SO Q&A offers a solution to the problem of running a command: How do I run the system commands in javascript?. This can be used to run the java command with the appropriate args.
If your javascript is trusted code running in a browser with a Java plugin, then you may be able to make a call to java.lang.System.exec(...) passing an appropriate java command line in the appropriate fashion. You may also be able to create a classloader, read the JAR file's manifest, extract the entry point class, load it, and call the "main" method.

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answered Aug 6, 2012 at 5:29

Stephen C

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Andrew Thompson · Accepted Answer · 2012-08-06 04:15:03Z

-5

java -jar executable.jar inputFile.txt outputFile.txt

For further details see the java command synopsis:

SYNOPSIS

answered Aug 6, 2012 at 4:15

Andrew Thompson

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