//
		class Employee{
			String name;
			void showinfo(){
				System.out.println(name);	
			}
			
		}

		class Manager extends Employee{
			String department;
			void showinfo(){
				super.showinfo();
				System.out.println(department);
			}
			
		}
		//例5-8
		class Show{
			void showinfo(Employee e){
				System.out.println(e.name);
				if(e instanceof Manager){
					System.out.println("It is a manager.");
				}
			}
		}

		class Test{
			public static void main(String args[]){
				Show s = new Show();
				Employee e = new Employee();
				Manager m = new Manager();
				e.name = "Joan";
				m.name = "Boss";
				s.showinfo(e);
				s.showinfo(m);
			}
		}