Try ASM: http://asm.ow2.org/ http://asm.ow2.org/ It is lightweight, well-documented and easy to use. It has an IntelliJ plugin that wills how you the sequenc

Try ASM: http://asm.ow2.org/ http://asm.ow2.org/ It is lightweight, well-documented and easy to use. It has an IntelliJ plugin that wills how you the sequence of API calls you'd need to make to create a given compiled Java class. I still recommend reading the spec. You'll need to understand the JVM execution model and the meaning of the byte codes to successfully target it.