Java compiler tree API - how do I set it up?

I wish to use the Java compiler tree 开发者_StackOverflowin Eclipse. I have come across the API itself on the Oracle web site here, however I cannot find the JAR file for the library. Am I missing something?!

Use:

com.sun.source.tree.*
com.sun.source.util.*

The above packages can be found in tools.jar. Please add tools.jar to classpath. You can find tools.jar in <JDK_HOME>/lib folder. Also, you can extract src.zip and find the related API source files there.