Java 9 folder structure

Below diagram shows the JDK 9 installation folder structure in windows operating system.

Java 9 directories/folders inside installation

Java 9 installation folder structure is different from the older versions. JDK 9 does not contain JRE as in older versions. JRE is separated into a separate distribution folder. In older version this same copy of JRE folder was available inside JDK folder.

JDK 9 has a new folder “jmods”. It contains a Java 9 Modules. These modules are split into four major groups: java, javafx, jdk, and Oracle.

java: Contains the implementation classes for the core standard edition.

javafx: Contains FX UI modules.

jdk: Contains modules used by jdk itself.

oracle: Contains oracle modules.