The actual number for Java is a little bit skewed probably. You're only using one maven central repository (which is already big enough). But there are other repositories as well such as RedHat's (JBoss, Hibernate, etc). SpringSource's (Spring frameworks, grails probably, and everything under SpringSource umbrella).
And also keep in mind that scripting languages have higher number largely because people use them for writing scripts/command-line as well. And if they insist to use Java for scripting well then... they deserve to be punished by walking up and down the stairs 20x per library per decision.