Class platform independent

              SET WALLPAPER IN DEFAULT 1.Use the Windows key + R keyboard shortcut 2.Select the Enabled option, and then type the path of the image you want to set as a default background. 3.Select User Configuration -> Administrative Templates -> Desktop -> Desktop 4.Use te Windows key + R keyboard shortcut to open the Run command. Type gpedit.msc and press Enter  Type gpedit.msc and press Enter 2.Select User Configuration -> Administrative Templates -> Desktop -> Desktop. Double-click the Desktop Wallpaper policy on the right side 3.Default wallpaper setting  Select the Enabled option, and then type the path of the image you want to set as a default background. Click Apply and OK. 4.Right click on the Start Menu Button and select command prompt or command pmpt (Admin) to open the CMD window. Type /force and hit ENTER

        DISABLE THE USB PORT How to Use the Device Manager to Disable USB Ports : 1.Log in to an administrator account.  on the Start menu. 2.Click on Device Manager. 3.Click on Universal Serial Bus controllers to view all of the USB ports. 4.Right click on the USB port that you would like to disable. 5.Select Disable devices  In the Group or user names list, select the SYSTEM account. 6.In the Permissions for UserName or GroupName list, click to select the Deny check box next to Full Control, and then click OK 7.Right-click the Usbstor.inf file, and then click Properties. 8.Click the Security tab. 9.In the Group or user names list, add the user or group that you want to set Deny permissions for. 9.In the Permissions for UserName or GroupName list, click to select the Deny check box next to Full Control. 10.In the Group or user names list, select the SYSTEM account. 11.In the Permissions for UserName or GroupName list, click to select the Deny check box next to Full Control, and then c

                      WINDOWS Stay protected with windows security :   1.Windows Security continually scans for malware (malicious software), viruses, and security threats. In addition to this real-time protection, updates are downloaded automatically to help keep your device safe and protect it from threats. 1.Windows Security is built-in to Windows and includes an antivirus program called Microsoft Defender Antivirus. (In early versions of Windows 10, Windows Security is called Windows Defender Security Center). .2.If you have another antivirus app installed and turned on, Microsoft Defender Antivirus will turn off automatically. If you uninstall the other app, Microsoft Defender Antivirus will turn back on automatically 3.Virus & threat protection - Monitor threats to your device, run scans, and get updates to help detect the latest threats. (Some of these options are unavailable if you're running Windows 10 in S mode.To customize how your device is protected with these Wind

  Introduction: The meaning of platform-independent is that the java compiled code(byte code) can run on all operating systems. A program is written in a language that is a human-readable language. It may contain words, phrases, etc which the machine does not understand. For the source code to be understood by the machine, it needs to be in a language understood by machines, typically a machine-level language. So, here comes the role of a compiler. The compiler converts the high-level language (human language) into a format understood by the machines. Therefore, a compiler is a program that translates the source code for another program from a programming language into executable code. This executable code may be a sequence of machine instructions that can be executed by the CPU directly, or it may be an intermediate representation that is interpreted by a virtual machine. This intermediate representation in Java is the Java Byte Code. Step by step Execution of Java Program: Whenever,