Oracle JDK requires a commercial license from Oracle and businesses (since 2019) need to purchase a commercial license in order to receive software updates. OpenJDK is completely open source with a GNU General Public License.
The main difference between OpenJdk and OracleJDK is licensing.
OracleJDK: This article is based on the "OracleJDK" ) (due to legacy), which is free for personal and development use but no longer free for commercial use. Popular OpenJDK builds includes Azul Zulu, Red Hat OpenJDK (IcedTea), Amazon Corretto, Eclipse Adoptium's Temurin, SapMachine, Microsoft OpenJDK, and more. 
It does not include web-browser plugin and Web Start. OpenJDK includes the virtual machine (HotSpot), the Java Class Library, and the Java Compiler.
OpenJDK: Currently, the "OpenJDK" ) developed by Oracle, Java community, Red Hat, Azul Systems, IBM, Microsoft, Amazon, Apple, SAP, provides a free and open-source Java Platform Standard Edition (or Java SE or JDK) official reference implementation. In addition to the disk space required for the installed images, there must be sufficient disk space for Java Update.The Java Development Kit (JDK), officially named "Java Platform Standard Edition" or "Java SE", is needed for writing and running Java programs. Note that only advanced users should modify the settings for temporary files. In the Temporary Internet Files panel, click Settings. To determine the location of this directory, go to the Java Control Panel (from the Windows Control Panel). Java SE uses the directory %APPDATA% to store temporary files. For instance, the installed image for the JDK could be installed to a non-Windows drive with a custom installation. However, it is possible to install the installed image on any drive. The installed image will, by default, be installed on the Windows drive - the drive where the Windows operating system is installed (sometimes called the system drive). 
The directory Program Files\Common Files\Java\Java Update, or Program Files (x86)\Common Files\Java\Java Update on 64-bit operating systems, contains Java Update, which enables you to keep your computer up-to-date automatically with the latest JRE releases. For the JDK, you are given the option of installing the following features:įor the JDK, the installed image consists of all the files installed under the directory jdk1.8.0 for the JRE, it consists of all files installed under the directory jre1.8.0.
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