I’m new in jME 3 and I have a question.
Can we use jME 3 SDK with Java Development Kit 7?
Just start the SDK with JDK7 installed, yeah. Theres some catches with JDK7 still though (some platform-related, some gl-related). We’ll add support for JDK7 as well as the new JavaFX 2.2 application bundles that are independent from the java plugin (they contain the runtime) some time soon.