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How to target JRE 1.5?

Hi,

In eclipse, I see my java project is using JRE 1.6.

Unfortunately the mac I'm targeting is only at JRE 1.5, and it looks like that's not going to change.

Can I somehow download the old JRE on my system (without messing up the current one...) and have eclipse recompile the project using JRE 1.5? I'm on a windows machine.

Thanks

DJ_AM_Juicebox

ASKER

Actually i just downloaded a different JRE and see how to use it for compilation.

I'm using JRE 1.5.0_06 while the mac I'm targeting has 1.5.0_16-b06-284.

I don't get any useful error messages, just:

java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at
.....
sun.applet.AppletPanel.run(AppletPanel.java:326)
at java.lang.Thread.run(Thread.java:613)

what does that mean?

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javaexperto

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DJ_AM_Juicebox

ASKER

Hmm I don't understand - in eclipse I don't see anyplace to choose which JDK version to compile with - only to choose which JRE to target. So my JDK is fixed, but the JRE can be variable. What should I do?

SOLUTION

Muhammad Khan

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DJ_AM_Juicebox

ASKER

Ok, well that fixed it, I picked a 5.0 compatible JDK.

However the applet just exits with no error recorded in the log files. So much for cross platform compatibility!

Thanks