• Java Tutorial
• Java API (library) 1.7 reference

• Java Development Kit (JDK) (compiler & run-time system).

User interfaces for programming with Java (all are free downloads):

• Eclipse is my hands-down favorite for “real” work.

• You can get the Oracle NetBeans IDE along with the J2SE download.

• You can also use Linux/CygWin/OSX emacs or vim as described in CS252