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If you have JBuilder 2005 Foundation you may have noticed that it
comes with JDK 1.4.

If you need an IDE with JDK 1.5 support, then you must update the JDK
to 1.5.

As I began stumbling through various, half-written, half-complete,
half-wrong procedures that Google located for updating the JDK, I
decided that if I ever got the JDK successfully updated, I'd write
something for others to use.

NOTE: I started by applying Update 4 to JBuilder 2005 Foundation. URL
for update 4: http://tinyurl.com/yogjlv (5th line down). That process
itself is rather cumbersome - READ THE INSTRUCTIONS!

Well, to cut right to the chase ... my JBuilder is now updated and is
100% functional, so here's the procedure I used:

1. Download JDK 1.5 from Sun
URL: http://java.sun.com/javase/downloads/index_jdk5.jsp
Download: JDK 5.0 Update 11 (or later) [*]

2. Install the JDK - note the directory where the JDK is installed

3. Start JBuilder

4. Project > Default Project Properties ... > Paths
- Point the JDK Path to your new JDK directory (from Step 2)

5. Click OK

6. Stop and restart JBuilder

7. Project > Default Project Properties ... > Build > Java
- Language features: Java 2 SDK, v 5.0 (generics enabled)

8. Click OK

9. Stop and restart JBuilder

You're done!
You should now have JDK 1.5 as the default for all your new projects.

[*] Somewhere along the line, someone decided to rename 1.5 to 5.0, so
JDK 1.5 is also known as JDK 5.0.