5-11eg.txt

清华大学第二版

public class Person {
	public String name;
		public String getName(){
			return name; }
}
public class Employee extends Person {
	public int employeeNumber;
	public int getEmployeeNumber(){
		return employeeNumber; }
}
public class Manager extends Employee {
	public Vector responsibilities;
	public Vector getResponsibilities(){
		return responsibilities; }
}
Employee jim = new Employee();
jim.name = "Jim";
jim.employeeNumber = 123456;
System.out.println(jim.getName()); 
Manager betty = new Manager();
betty.name = "Betty";
betty.employeeNumber = 543469;
betty.responsibilites.add("Internet project");
System.out.println(betty.getName());
System.out.println(betty.getEmployeeNumber());