I have a jdk problem. I installed JDK SE Development Kit 8 Update 5. I opened the Command Prompt and wrote "javac" for testing whether i install jdk correct or not and the list that what i can do with javac- line appeared. According to that i am sure i installed jdk correct. But when i try to compile some java codes there is an error that "the file not found". But I can assure you that i have that file in that location. I use Eclipse editor and i try to write codes in that too and in that there is no source folder appeared. I have Windows 8 64-bit OS and added the path jdk1.8.0_05\bin to enviroment variables. I can't find anything so can you see the problem and what can i do?