Execute java prog without Runtime.exec()? Does any "JavaExecutor" exist?

Question

Is there any way to run a Java program from inside another Java program without using Runtime exec?

Is there some kind of JavaExecutor tool which one could use with a DiagnosticCollector? (Like JavaCompiler)?

What's the problem with using Runtime.exec()? Is the sub-program already compiled or do you only have the source? Do you want to run it in the same JVM or a child JVM? — Matt Ball, Commented May 24, 2013 at 5:49
Sub-program is already compiled. So I can't call main()... There is no problem with runtime.exec but I must analyse any eventual exec error and so a tool using some kind of diagnostic collector would be nice. I don't care which JVM it uses as long as I can acces stderr. — Bastien, Commented May 24, 2013 at 6:13
It does not matter if it is compiled. Make sure you have the .class files (or .jar file) in your classpath (both at compile time and runtime of your program) and it should be possible to access and call the main method. — devconsole, Commented May 24, 2013 at 6:53
I don't have the .class file at compile time, it's compiled during the execution. — Bastien, Commented May 24, 2013 at 8:29

RickDavis · Accepted Answer · 2013-05-24 05:56:05Z

1

Call it through Reflection if you want to pass in class name during runtime. If program throws an exception, capture the stack trace and use it for further diagnostics.

answered May 24, 2013 at 5:56

RickDavis

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Manish Doshi · Accepted Answer · 2013-05-24 06:06:25Z

0

Yes,IBM provides one Diagnostics Collector for gathering documentation and diagnostic data associated with Java Virtual Machine (JVM) problems. At JVM start up it runs a Diagnostic Configuration Check.

answered May 24, 2013 at 6:06

Manish Doshi

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