class Printer05{
void open(){
System.out.println("open");
}
void close(){
System.out.println("close");
}
void prin(){
}
}
//该打印机为喷墨打印机
class HPPrinter05 extends Printer05{
void print(){
System.out.println("使用喷墨打印机进行打印");
}
}
//该打印机为针式打印机
class CanonPrinter05 extends Printer05{
void print(){
System.out.println("使用针式打印机进行打印");
}
}
class Test05{
public static void main (String args []){
Printer05 p1 = new HPPrinter05();
p1.open();
p1.print();
p1.close();
Printer05 p2 = new CanonPrinter05();
p2.open();
p2.print();
p2.close();
}
}