Quick Mac Tip : install Java 1.5 on OS X Lion
If you're like me, you might need to test compatibility with Java 1.5 despite the fact that it's old and that nobody should use it anymore :) Unfortunately the reality is that some users migrate slowly, and so it might be useful to be able to test with old versions of the JDK.
As you probably know, the JDK 1.5 is not available officially for Mac OS X Lion. But there is a way to install it anyway, and it is very well documented here : http://www.s-seven.net/java_15_lion
Let me know if you liked this tip, I might add more in the future :)