清华大学：JAVA教学课件：5-10eg

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());