bytecode

for example like HotSpot.. I stopped its complied mode and I was thinking bytecode of classes should be in the memory by the opcode presents.. But it seems I am wrong.. so some experts told me that there should be some transformation processes when loading bytecode into memory.. Could any body give me more instructions about this issue...? Thank you a lot! You can get some hints by looking at the documentation of an API that forces the JVM to transform the internal representation back into the official class file format: http://docs.oracle.com/javase/7/docs/api/java/lang/instrument

Is it possible to determine all the possible execution paths by reading the bytecode of a given method, or will that be equivalent to trying to solve the halting problem? If it can't be reduced to the halting problem, then how far can I go with static analysis without crossing the boundary of trying to solve the halting problem? Related question: "Finding all the code in a given binary is equivalent to the Halting problem." Really? Yes, this is easily equivalent to solving the halting problem. Consider the following if statement: if (TuringMachine(x)) then goto fred; OK, is it really possible

Lets say , there are some import statements in a class. When the byte code is generated for that class, what happens to these import statements. If the import statements are ignored during runtime, how are the dependencies on that classes methods resolved during runtime. The purpose of import statements is just to make life easier for the human readers (and authors) of the code. Thus they are replaced by references to the fully qualified class/method names in the bytecode. And unused import statements are ignored. Hachi import in Java is just a shorthand so that if you import java.util.* you

To what extent is python bytecode compatible between releases. I'm not talking about python2.x to python3.x but say... Python33 to python34? I am not after it for 'security' I use Cython to convert the bulk of a program to C, I do however use pyc file as a means to store some constants and pyc is preferable as it provides a file format that isn't easily changed unofficially. If someone wants something changed they can request via internal procedures Such a pyc file only contains variables which are Int,float,list,dict,string in stf python. One class but it acts more as a container/struct. Is

Identifiers are well defined by The Java Language Specification, Java SE 7 Edition (§3.8) An identifier is an unlimited-length sequence of Java letters and Java digits, the first of which must be a Java letter. As far as I know, since a method name is an identifier, It should be impossible to name a method starting with a digit in java, and javac respects this rule. So, why does the Java Virtual Machine seem to not respect this rule by allowing us to name a function starting with numbers, in Bytecode? This simple snippet will actually print the f99() method name and the value of its parameter.