How install Java 21 on Windows Follow these steps to quickly install Java 21 on your operating system: Navigate to jdk.java.net and download your platform’s zip file. Extract the Java 21 zip file to a ...

Establish a file association with Java runtime. 1] Download and install Java Framework To run a JAR file on Windows, you need to install Java on your system. Go to Java Download Page, and install it.

Java is one of those things that you don’t need to download until the moment you do. Most computer users will go about their business without having to download Java for Windows.