where to download the javadoc for tools.jar?

I'm referring to the jar with the Compiler Tree API, referred to here

It can be found here but not for down开发者_StackOverflow社区load. Maybe I could download it from there with downthemall, but what are the alternatives?

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The Javadoc for the tree API comes with the official JDK documentation.

The JDK documentation can be downloaded from: http://www.oracle.com/technetwork/java/javase/downloads/index.html#docs

Inside the downloaded ZIP, look in /jdk/api/javac/tree directory.

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Prunge was right, but they have moved, and note that the javadocs are not in a separate jar. Currently, (Oct 2017) the javadocs for the Compiler Tree API are still included in the Javadoc API bundle from Oracle. Download and extract the zip. The path to the javadocs are under docs/jdk/api/javac/tree. In NetBeans, you can use that as the "folder" in the library settings javadoc tab.