[java] eclipse, running my program with older JRE

Select Project->Properties and then open the Java Build Path section. Under 'Libraries' you can set the JDK you want to use for that project. You may also need to change some of the options under Java Compiler too.

I'm not an Eclipse user (I use netbeans), but I'm pretty sure that you can register other Java platforms within your IDE. At least it's possible with Netbeans, and I don't see a reason why Eclipse wouldn't have such feature.

Check the help files, it should be easy to do so (if available).

Son Of Cain

[Edit: I was beaten by OrangyTang =]

Go into menu "Project/Properties", select"Java Build Path" on the left side of the window, choose "Libraries" tab, and replace shown "JRE System Library" (and perhaps any other related library like "JDK Tools") by the older one.

Then choose "Java Compler" on the left side of the window, and pick the compiler compliance level suitable for the chosen JRE.


EDIT: OrangyTang was too fast ;)

You also need to tell Eclipse what JREs are on your machine. You do this with Window->Preferences->Java->Installed JREs

Thanks guy. Java and eclipse not my cup of tea obviosly :D