Preparing class files for upload

You may upload an arbitrary number of Java classes both in the source form (*.jav or *.java) and in the bytecode form (*.class).To avoid the restriction of no more then 4 simultaneosly uploaded files imposed by fill-out form (cf. page Regular work) you may zip them - be sure to use compatible zip.


If you can't or don't want to install Java Development Kit (JDK) at your computer

It would be OK to upload only sources of Java classes may be in the zipped form. The only incovenience caused by this approach would be a great number (probably) of compilation errors detected not at your local computer but at the server. If you have written already your Java classes go to the Regular work now!


If you have not installed JDK yet but have not objection to do it also

You simply need to download it from java.sun.com, to install it and to follow the next instructions.


If you have installed JDK already