What is OpenJDK?

OpenJDK is an open-source implementation of the Java Platform, Standard Edition (Java SE). It includes

• Java SE implementation: the libraries, languages features, and APIs.
• Compiler/javac: Converts Java source code into bytecode.
• JVM: Interprets and compiles bytecode into machine code, and runs it.
• Standard libraries: collections, input/output, concurrency, etc