any one plz help me and send me code of compiler.in java...
There are lots of people here who will freely give their time to help you become the best Java programmer you can be. There's nobody here who is interested in helping you cheat or doing your homework for you.
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I think compilers for new people if thats what he is looking for is something like Eclipse or Netbeats, I myself prefer Eclipse from those 2 but since I started using Linux lately I've been using Sublime text as text editor and execute my code in the terminal. Personally I think subline is just amazing, with a few minor glitches so to speak, as its being too smart in some moments :p
Slavi: according to the original post, (s)he is not looking for a compiler (nor an IDE), but is trying to write/create one. actually, is asking us to create it, so (s)he can hand it in as his/her solution to an assignment.