Make sure to download the JDK, not the JRE (runtime environment). The official JDK should be downloaded from the official Oracle Java website. So let us see how to install and update the Java Development Kit (JDK) on macOS on your own. Since macOS 10.7 Lion (2011) it is not pre-installed anymore. In macOS 10.6 Snow Leopard and below Java was pre-installed and shipped with your Mac. If you want to write some Java code on your Mac, you will need the JDK to run your code. The Java Development Kit (JDK) is essential for Java developers and contains the Java runtime environment as well as the Java compiler and other Java libraries.
This article explains how to install and update the Java Development Kit (JDK) on macOS, how to check Java version, and how to set the JAVA_HOME variable.