Generating a 'Hello, World!' class with the Java ASM library

manpreet Best Answer 2 years ago

I have started messing around with the ASM API for a compiler project I am working on. However, I am finding that the documentation is less than clear for a newcomer in many places and I thought having a good solid example of generating a class that simply prints "Hello, World!" would be a great example to have on here.

Currently, I can generate a class with a main() (using the ClassWriter, ClassVisitor and MethodVisitor classes) but I can't seem to work out how to generate main's body. Could anyone give me an example of generating a class file in ASM that:

• contains a main()
• creates a local String variable in main() with the value "Hello, World!"
• prints the variable