Generating, compiling and using Java code at run t

Question

I have a scenario where I have to generate Java code when my application is running.

Can compile and run than code from my application( as a separate application).

Is it possible to compile and then use it from the same application. Cant think of any possibility

Answer 1

Check out Create dynamic applications with javax.tools. Second time I've referenced this today--I swear I don't work for them.

Answer 2

You can use an instance of JavaCompiler:

JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

Follow the link for the an example on how to use it.

Answer 3

using the ProcessBuilder or Runtime.exec() you can run any commandline app from your java code

this includes the javac compiler and java as a separate process