Java is a programing language, which means it is used for making computer programs as well as many other things.

Java script is a browser scripting language, it is used to enhance web sites. If...

Wait you know how to make the UI but you can't create a simple conversion?

Well if you can't download eclipse try looking for help at there website http://www.eclipse.org/

If you are just starting to learn Java try picking up the book "Fundamentals of Java by Lambert/Osborne" It starts out real simple and builds.

Also cheak out ...