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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.

Don’t worry about jdk-10.0.1 as this might change for future releases.The Java Development Kit (JDK), officially named "Java Platform Standard Edition" or "Java SE", is needed for writing and running Java programs. Set your JAVA_HOME environment with Sys.setenv(JAVA_HOME="C:/Program Files/Java/jdk-10.0.1/") so that it points to your specific (64-bit in my case) folder that contains the jdk.

Install rJava with install.packages("rJava"). Conversely, if you installed 64-bit then everything should be installed in C:/Program Files/Java/. If you installed 32-bit Java then everything should be saved in C:/Program Files (x86)/Java/. For 64-bit I had to download the Windows version from here. I had 64 bit so I downloaded the Offline 64-bit version from here.ĭownload Java JDK for 32/64 bit. R and Java must have the same memory signature, either 32 or 64 bit.

Check Platform.ĭownload the specific 32/64 bit of Java. Post here the steps that made it work in case anyone is interested (that is, future me).Ĭheck whether R is 32/64 bit with sessionInfo(). Struggled for about two hours to install rJava on my Windows 10 machine.