System class of the java

       In many applications we want to get some of the system properties as some features of java are not being able to be used on older versions of either Java or the operating system. So here I have made an simple command line program just to display all the basic and necessary properties of System class. 

        There is only one method we have to use of the System class is "getProperty()". The method System.getProperty() holds the one argument which is of type String. So if any one who is beginner to this and using notepad, then I suggest to read the argument carefully and type it as it is in the given example. Because if there will any spelling error in it, there are chances of giving it a runtime error. So be very careful about spelling while typing the progrm.

class SystemClass

{

public static void main(String[] ar)

{

System.out.println("1 : " + System.getProperty("java.version"));//Current Version Name

System.out.println("2 : " + System.getProperty("user.name"));//Current Username

System.out.println("3 : " + System.getProperty("user.dir"));//Current user driectory

System.out.println("3 : " + System.getProperty("user.home"));//Home directory of the user

System.out.println("4 : " + System.getProperty("os.name"));//Operating System name

System.out.println("5 : " + System.getProperty("os.arch"));//Operating System Architecture Ex : x86= Microprocessor 8086 architecture

System.out.println("6 : " + System.getProperty("os.version"));//Operating System version

System.out.println("7 : " + System.getProperty("java.io.tmpdir"));//Temporary directory of user

System.out.println("8 : " + System.getProperty("java.ext.dirs"));

System.out.println("9 : " + System.getProperty("java.specification.version"));//Version of java

System.out.println("10 : " + System.getProperty("java.specification.vendor"));//Vendor of java

System.out.println("11 : " + System.getProperty("java.specification.name"));//name of java Specification

System.out.println("12 : " + System.getProperty("java.class.path")); //Classpath of JDK

System.out.println("13 : " +System.getProperty("java.class.version"));//Version of java class

System.out.println("14 : " +System.getProperty("path.separator"));//path separator of classpath

System.out.println("15 : " +System.getProperty("line.separator"));//it will show two blank line

System.out.println("16 : " +System.getProperty("java.vm.name"));//name of JavaVirtualMachine

System.out.println("17 : " +System.getProperty("java.vm.vendor"));//Vendor of java Virtual Machine

System.out.println("18 : " +System.getProperty("java.vm.version"));// version of java virtual machine

System.out.println("19 : " +System.getProperty("java.vm.specification.name"));//specification name of java virtual machine

System.out.println("20 : " +System.getProperty("java.vm.specification.version"));//specification version of java virtual machine

System.out.println("21 : " +System.getProperty("java.vm.specification.vendor"));//vendor of specification of java virtual machine

System.out.println("22 : " +System.getProperty("java.vendor.url"));//main url of java 

System.out.println("23 : " +System.getProperty("java.vendor"));

System.out.println("24 : " +System.nanoTime());

//System.load(System.getProperty("user.dir") + "\\" + "MyClass.java");

}

}

    Type above example and save it as the name you want and run with the name of class. The output of the above code will give something like below.