Help4j greatly reduces the time spent searching for answers to thousands of programming problems; it allows you to learn from other developers' code and keeps developers from reinventing the wheel. Help4j is based on an extensive analysis of millions of lines of source code from hundreds of open source projects. If someone else has solved your problem before, it is most likely that Help4j has the solution for you!

Best of all, Helpj4 is free for non-commercial use.

• More than 25 000 code examples for classes from the J2SEtm platform.
• More than 1 000 open source utility functions and classes.
• Code examples for almost all commonly used methods from the J2SE platform and for many rarely-used methods.
• Most frequently used methods are shown first.
• Examples of subclasses and of interface implementations
• Quick navigation: jump to a class by entering its abbreviation
• API Navigator provides faster access to the 200 most frequently used classes of the J2SE platform.
• The Help4j programming reference contains more than 40 MByte of highly organized, easily accessible information for the Java language!
• Hundreds of notes, links and references.