Java SE (Java Standard Edition) Runtime Environment is a software package that provides the minimum requirements for executing a Java application. It includes the Java Virtual Machine (JVM), the Java platform core classes, and supporting Java platform libraries.
The Java SE Runtime Environment is used to run Java applications on your computer. It is not a development environment and does not contain development tools such as compilers or debuggers. To develop Java applications, you need the Java Development Kit (JDK).
Java SE is platform-independent, which means that you can run the same Java program on any device that supports Java, regardless of the operating system or architecture. Java SE is widely used in developing desktop, mobile, and web applications.
You can download the Java SE Runtime Environment from the Oracle website. It is available for multiple platforms, including Windows, Linux, and MacOS.