simple porting (from c) problem

[Kearnel]

The bottom line is that I'm having trouble porting code because of the c (the language c) stream operator "<<".

here is the code I'm having trouble with:

#define xtime(x)   ((x<<1) ^ (((x>>7) & 1) * 0x1b))

I really need to know what this code does, Thanks in advance.;)

[JavaHater]

there are bit operators

[Jodokus]

Funny guys, those C-programmers!
I'm no C guru (anymore. It's too long ago, so don't take me too seriously).
Operatoroverloading is c++ (i.m.h.o.), so JavaHater is right: << is a shift-operator.
^ bitwise OR, & bitwise AND, * times. I guess 0x1b is ASCII 27, ESCAPE (00011011).
Further I'm at a loss: maybe a very concocted way to check if the escape has been pressed.

[Kearnel]

No, this code has nothing to do with the keyboard. It's part of the AES encryption cipher.

Thank you very much. I think this is all I need.:)

[ClickerMonkey]

the provided define can be directly translated to java, same operators in java do the same thing.

[Kearnel]

Alright, the AES (Rijndael) encryption code I ported from c is not working correctly and I'm wondering of anyone knows where to find AES code in java I can look at.

My goal is not simply to encrypt data but to learn how the cipher works. Then I want to be able to modify the cipher code and play around with it.