1. Eclipse - Turn assertions on - by default, assertions are turned
off in Java. This means all assert statements are ignored
by the Java Virtual Machine. To enable (make active) assert
statements, you must set a flag to the JVM. Go to Run -> Open Run
Dialog ... -> Arguments, and in the box labeled VM arguments:, enter
either -enableassertions or just -ea.
Apply the changes and close the dialog.
2. Javadoc - Javadoc is part of the Sun Java release, but you must tell Eclipse where to find it. Search for "javadoc.exe" (note that you may find it in two different locations - use either location). Next, in the Eclipse workbench, select Project -> Generate Javadoc and enter the location in the textbox underneath "Javadoc command:". Hit finish and say "Yes To All" when asked if you want the Javadoc location to be in folder 'doc'.
3. After downloading JUnit-4.4.jar, you need to add it to the Eclipse build path of each project you create. In Eclipse: