Share 'Google Web Toolkit on a Mac'

Hi all, I'm trying my hand at Java development with the GWT with Eclipse on a mac. According to Apple, Leopard comes standard with Java and it's SDK. Eclipse detected Java 1.5 JRE and SDK. But With Leopard Update 2, Java 1.6 is also supported. But there's no mention if the SDK was also included. The GWT user guide says I need to install the Java SDK, and I want to use Java 1.6. Do I need to inst…