How do I set the default Java installation/runtime (Windows)?

Question

I\'m in the situation where I\'ve installed the JDK, but I can\'t run applets in browsers (I may not have installed the JRE).

However, when I install the JRE, it clo

Answer 1

I have several JDK (1.4, 1.5, 1.6) installed in C:\Java with their JREs. Then I let Sun update the public JRE in C:\Program Files\Java.
Lately there is an improvement, installing in jre6. Previously, there was a different folder per new version (1.5.0_4, 1.5.0_5, etc.), which was taking lot of space