It was a bit tricky figuring out what depended on what when I read the java plugin docs in the user manual
JIRA won't let me use a fixed-width font (which is inconvenient for code snippets & ascii art fans!),
so here's a linearized version:

clean
init - resources - compile - testResources - testCompile - test - archive_jar - libs
libs - uploadInternalLibs
libs - uploadLibs
libs - dists - uploadDists - upload
javadoc
eclipseCp
(javadoc,eclipseCP) - eclipse
eclipseClean
eclipseProject

Obviously, a pretty graphic would make things a lot nicer here!

I ended up using a bit of groovy to figure it out:

tasks.each { t ->
if ( ! t.value.dependsOn) println "$t.value"
else t.value.dependsOn.each

}