How to get my current system properties in Java?

The System class contains several useful class fields and methods. Accessing the current system properties is one of facilities provided by the System class. For example, to get the operating system name string in Java use the static System.getProperty("os.name") method. Here is a sample code to walk through system properties in Java:

public class SystemPropertiesWalker  { 
 
    public static void main(String[] args) {  
        Properties properties = System.getProperties();
        Set<Object>  sysPropertiesKeys = properties.keySet();
        for (Object key : sysPropertiesKeys) {
            System.out.println(key + " =" + properties.getProperty((String)key));
        }
    }
}

If there is no current set of system properties, a set of system properties is first created and initialized. This set of system properties always includes values for the following keys:

Printer-friendly version | Mail this to a friend