Class casting and JVM

[herb slocomb]

When downcasting, Subclass = Superclass, what are the many steps occuring behind the scenes within the JVM ?
There is some overhead involved in this action that is best avoided, but I can't find any specific doc on what exactly is happening in the JVM. I don't need the opcodes, although that would be appreciated, but I do want to know each step that would represented by an opcode.

[Marilyn de Queiroz]

You can get the op codes (or at least the byte codes) by using javap -c YourClass.
[This message has been edited by Marilyn deQueiroz (edited November 02, 2001).]

[herb slocomb]

Thanks again Marilyn.
Yes, the javap -c thing is cool and to get more detail on the byte codes see http://mrl.nyu.edu/~meyer/jvmref/ref-Java.html
although that link is a little old.

[Marilyn de Queiroz]

Another good link regarding bytecodes