Creating the Java 9's modular system resulted in some simplification in respect to the number and location of development and utility tools. One such example is the JDK's consumption of the JRE. In all pre-Java 9 versions, the Java platform included the JDK and JRE as two separate components. In Java 9, these components have been combined. This is a significant change and one that developers should be keenly aware of. If you have an application that specifically points to the JRE directory, you will need to make changes to avoid problems. The JRE contents are shown as follows:
