Compile Java in memory

Question

Is there a way to emit Java bytecode in memory and execute it? I know that there's JavaCompiler class, but I'm asking something like Reflection.Emit of .NET platform.

the JavaCompiler class can be used to work entirely in memory (i wrote a libray to do this some years ago) not that it makes much difference. ;-) — Peter Lawrey
– Peter Lawrey, Commented Dec 25, 2012 at 13:21

Jayamohan · Accepted Answer · 2012-12-25 08:45:36Z

4

Can you check out the following

BCEL
ASM

answered Dec 25, 2012 at 8:45

Jayamohan

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gsscoder Over a year ago

+1 to both, one of this is exactly I need; now I've to spend some time to understand which API is simpler for my task (compile in memory a mathematical expression, for now)

Community · Accepted Answer · 2017-05-23 10:24:45Z

1

You need to play with the class loader to load dynamically some class. There are some interesting SO questions on the subject:

edited May 23, 2017 at 10:24

CommunityBot

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answered Dec 25, 2012 at 11:12

Seki

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Sri Harsha Chilakapati · Accepted Answer · 2012-12-25 08:48:24Z

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This is possible but this requires the end user also to install JDK. Compile the bytecode to memory and create a new java process and start it. You can also execute java source directly.

See Beanshell2.

answered Dec 25, 2012 at 8:48

Sri Harsha Chilakapati

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