The use of Java object-oriented interfaces

InterfaceUSB {voidstart (); voidstop ();}classUsbdiskImplementsUSB {@Override Public voidstart () {System.out.println ("USB Stick Insert"); } @Override Public voidStop () {System.out.println ("USB Drive Unplugged"); }}classPrintImplementsUSB {@Override Public voidstart () {System.out.println ("Turn on Printer"); } @Override Public voidStop () {System.out.println ("Turn off Printer"); }}classpc{ Public Static voidWork (USB USB) {Usb.start (); System.out.println ("Device Access detected");    Usb.stop (); }} Public classInterfacedemo { Public Static voidMain (String args[]) {PC PC=NewPC (); Pc.work (NewUsbdisk ()); Pc.work (NewPrint ()); }}

The use of Java object-oriented interfaces