.classpath for Eclipse Java Project

When doing development work with Java project whose's classpath is complex, I need to make sure which classpath is appended to CLASSPATH before others. Here is the rule:

1. output folder is appended first.

2. Other classpathentries are appended as the order that they are listed in .classpath. The order that they are listed in Project properties dialog has no effect.

3. Inside a user library, entries are appended as the order that they are appeared.