When you first are learning how to code, you can get overwhelmed with all the new terminology and syntax. Even experienced programmers experience this if they are learning a new language. Princeton University has a great Java cheat sheet for all of you programmers to have on hand the next time you are programming in Java. It's pretty helpful, if I must say so myself.
>> Cheatsheet: http://bit.ly/1BPeoQZ
>> Common APIs: http://bit.ly/1vrCoX5