Black Horse Programmer--java--system class method Demo

a demonstration of some methods of the system class:

Import Java.util.properties;import Java.util.set;public class Ststemdemos {public static void main (string[] args) { Method1 ();}   private static void Method1 ()    {//Gets the property information of the system Properties  Pro = System.getproperties (); set<string>  setname = Pro.stringpropertynames (); for (string name:setname) {String value = Pro.getproperty ( name); SYSTEM.OUT.PRINTLN (name + "  :  " + value);}} private static void Methd ()   {      //Gets the millisecond value of the current time long L = System.currenttimemillis (); System.out.println (l);   }}

To Run the program:

Black Horse Programmer--java--system class method Demo