Bytecode features not available in the Java language

Question

Are there currently (Java 6) things you can do in Java bytecode that you can\'t do from within the Java language?

I know both are Turing complete, so read \"can do\"

Answer 1

• GOTO can be used with labels to create your own control structures (other than for while etc)
• You can override the this local variable inside a method
• Combining both of these you can create create tail call optimised bytecode (I do this in JCompilo)

As a related point you can get parameter name for methods if compiled with debug (Paranamer does this by reading the bytecode