Java System.getProperty Guide

The System.getProperty() method in Java is used to retrieve system properties, which are a set of key-value pairs provided by the Java runtime environment to describe and control the program’s execution environment.

The System.getProperty() method requires a string parameter that represents the key of the system property to retrieve. It returns the value associated with that key, or null if not found.

By using the System.getProperty() method, you can access common system properties such as the name of the operating system, its version, and the username. These details are useful for understanding and managing the program’s execution environment.