How to set Java 64-bit as the default?

Hey everyone, I need to use Java 64-bit in Mac OS X Lion and I thought it defaulted to using the 64-bit JDK until I ran Minecraft which stated I was running the 32-bit JDK and if I deselect the 32-bit entry in Java Preferences it deselects the 64-bit entry as well. Does anyone know of a way to make OS X default to the 64-bit version, I also make use of the 64-bit JDK on Windows to ensure my Java applications in NetBeans run correctly on either flavour.
I did try using the OpenJDK 7 and downloaded the 64-bit runtime and installed it correctly and confirmed it was running but when running the Minecraft.app I was greeted with a message saying no compatible JDK 1.5+ was installed and when using the Terminal, it was failing to logon correctly, but was working fine in the standard JDK but like I said, I'm stuck with 32-bit in that case.
Regards, Wobby.

Does minecraft support 64-bit Java? 
There isn't really a default java, but you can set the order for your preferred java.  Go to the Java Preferences (/Applications/Utilities/Java Preferences) and on the General tab just make sure the 64-bit java is first (you can click and drag them to change the order).
You might also try disabling the 32-bit java by unchecking the "ON" check box next to it and see if Minecraft will run and with which Java (if shouldn't be able to launch the 32-bit one if it is off).
Good luck!

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