Hey I am having the same problem where "javac HelloWorldApp.java" is not printing any errors, but no .class file is being made. I am fairly sure my PATH variable is correct - C:\Program Files\Java\jdk1.6.01_01\bin - but since there isn't any error, I have no clue what is going on. The spelling for the .java file and the installation of the compiler to the indicated folder are both correct. PLEASE HELP!