Eclipse Project Access Java Core Classes On Mac OS X

Question

Am running Eclipse on Mac OS X but for some crazy reason it just can't find my Java base classes like ArrayList etc... I just the Install JRE under Preferences and there is a valid JDK that got all the classes correct like point to classes.jar etc... Any idea what can be wrong? And yes I did do a Clean, it just can't build.

Eclipse Helios, latest Java 6, Snow Leopard Mac OS X

Version of Eclipse? Version of Java? Version of MacOSX? – bmargulies Jul 08 '11 at 17:35 — bmargulies, Jul 08 '11 at 17:35
Eclipse Helios, latest Java 6, Snow Leopard Mac OS X. – Lennie Jul 11 '11 at 07:18 — Lennie, Jul 11 '11 at 07:18
Have a look at http://stackoverflow.com/q/2846573/796559 – Tonny Madsen Jul 11 '11 at 17:50 — Tonny Madsen, Jul 11 '11 at 17:50

score 1 · Accepted Answer · answered Jul 11 '11 at 08:03

It is likely that your Eclipse uses the Java JRE and not the JDK. You need to point Eclipse to where your JDK is installed.

Go to Preferences -> Java -> Installed JREs and Add your JDK directory. Then make sure that you uncheck (or remove) the previous JRE. That should allow you to see the base classes.

Eclipse Project Access Java Core Classes On Mac OS X

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