Regardless of your operating system, you will need to install some Java virtual machine (JVM).
In all cases, Eclipse requires a 64-bit JVMĪ Java Development Kit (JDK) includes many useful extras for Java developers including the source code for the standard Java libraries. If you are using Eclipse to do Java development, or are on macOS, install a JDK. Current releases of Eclipse require Java 11 JRE/JDK or newer.