I can develop an application/project. But that is not in the correct coding standard. it takes large memory and others can not be understand it easily. What the General Stan
http://www.oracle.com/technetwork/java/codeconvtoc-136057.html
If a project you're already working on has coding standards defined, use that. Otherwise, you can follow standards like the one I linked above and make sure you're consistent in using it. It'll help make your programs readable for yourself and others.