ADDITIONAL SYSTEM INFORMATION :
does not apply

A DESCRIPTION OF THE PROBLEM :
Reading through the existing java.lang.classfile code and documentation, I don't see how to create a new local variable. I do see how to read one in from an existing class file. BCEL and ASM both have the ability to create a local variable of any type and with a specific scope. (They also allow you to assign the offset in the LocalVariableTable, but I would expect you to handle that automatically behind the scenes.) I would expect to be able to create a local with method scope or with block scope. Probably with the ability to create a corresponding LocalVariableTypeTable entry if requested. It seems like the various byte code instruction builders should have a way to access these locals symbolically as opposed to just by slot number.