Java Software Development Kit (SDK) for Java 6 on Leopard.

Does anyone know if the Java Software Development Kit (SDK) comes with Leopard, or if one needs to sign up for an Apple developer account to obtain it?

I typed the following command on the Terminal command line:

javac

The output of that command was:

Usage: javac <options> <source files>

where possible options include:

-g Generate all debugging info

-g:none Generate no debugging info

-g:{lines,vars,source} Generate only some debugging info

-nowarn Generate no warnings

-verbose Output messages about what the compiler is doing

-deprecation Output source locations where deprecated APIs are used

-classpath <path> Specify where to find user class files

-cp <path> Specify where to find user class files

-sourcepath <path> Specify where to find input source files

-bootclasspath <path> Override location of bootstrap class files

-extdirs <dirs> Override location of installed extensions

-endorseddirs <dirs> Override location of endorsed standards path

-d <directory> Specify where to place generated class files

-encoding <encoding> Specify character encoding used by source files

-source <release> Provide source compatibility with specified release

-target <release> Generate class files for specific VM version

-version Version information

-help Print a synopsis of standard options

-X Print a synopsis of nonstandard options

-J<flag> Pass <flag> directly to the runtime system

I would like to use Java version 6.