This is because it indicates the sequence of major Java releases – in this case, it is the first major release after JDK 1.7. The version number “1.8” is sometimes referred to as a “developer version number”, or an “internal version number”. The version numbers are simply dfferent ways of referring to the same release of the Java Development Kit (JDK). To use the JDK, you may need to set up environment variables, such as PATH, JAVA_HOME, or CLASSPATH. It also includes libraries of classes and other resources necessary for developing Java programs, such as the standard Java class library. The JDK contains tools necessary for developing and running Java applications, such as the Java compiler and runtime environment. The Java Development Kit (JDK) is typically installed on a computer in the C:\Program Files\Java\jdk1 directory. Finally, the release folder contains version information about the JDK 11 installation. The lib folder contains the core Java libraries needed to run Java applications. The jmods folder contains Java Modules, which are a collection of pre-compiled Java classes that can be used to create custom runtime images. The bin folder contains the Java compiler (javac) and other tools necessary to develop and run Java programs. This directory contains seeral folders, each of which serves a different purpose. Your JDK 11 is installed in the directory /Library/Java/JavaVirtualMachines/jdk-interim on your Mac.
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