O'Reilly logo

Java 9 Cookbook by Nick Samoylov, Mohamed Sanaulla

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

How it works...

The data required for compiling to a target older version is stored in the $JDK_ROOT/lib/ct.sym file. This information is used by the --release option to locate the bootclasspath. The ct.sym file is a ZIP file containing stripped-down class files corresponding to class files from the target platform versions (taken verbatim from http://openjdk.java.net/jeps/247). 

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required