extendsdemo1.java

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public class ExtendsDemo1 
{
	Employee e1,e2;   //声明雇员类对象e1和e2
	Manager m;        //声明经理对象m
	public ExtendsDemo1()
	{
		//初始化雇员对象e1，并显示雇员信息
		e1 = new Employee("Wang Xiao Yue",3000.00,"2005/05/20");
		System.out.println("name:"+e1.getName());
		System.out.println("Salary"+e1.getSalary());
		System.out.println("Hireday"+e1.getHireDay()+"\n");
		
		//初始化雇员对象e2，并显示雇员信息
		e2 = new Employee("Tong Gang",5000.00,"2005/05/10");
		System.out.println("name:"+e2.getName());
		System.out.println("Salary"+e2.getSalary());
		System.out.println("Hireday"+e2.getHireDay()+"\n");		
		
		//初始化经理对象m，并显示经理信息
		m = new Manager("Zhao XS",8000.00,"2004/6/2",4000.00,20);
		System.out.println("name:"+m.getName());
		System.out.println("Salary"+m.getSalary());
		System.out.println("Hireday"+m.getHireDay());	
		System.out.println("Bonus"+m.getBonus());
		System.out.println("Holidays"+m.getHolidays());
	}
	
	public static void main(String[] args) 
	{
		new ExtendsDemo1();
	}
}

class Employee          //自定义雇员类
{
	private String name;        //雇员姓名
	private double salary;      //雇员薪水
	private String hireDay;		//雇员入职时间
	
	//含有参数的构造方法
	public Employee(String name,double salary,String hireDay)
	{
		this.name = name;
		this.salary = salary;
		this.hireDay = hireDay;
		System.out.println("I'm Employee");
	}
	
	//用于获取雇员信息的方法
	public String getName()
	{ return name; }
	public double getSalary()
	{ return salary; }
	public String getHireDay()
	{ return hireDay; }
}

class Manager extends Employee
{
	//Manager类特有属性
	private double bonus;   //奖金
	private int holidays;   //年假
	
	//构造方法，用来初始化Manager对象
	public Manager(String name,double salary,String hireDay,double bonus,int holidays)
	{
		super(name,salary,hireDay);  //调用父类构造方法
		this.bonus = bonus;
		this.holidays = holidays;
		System.out.println("I'm Manager");
	}
	
	//获取奖金值
	public double getBonus()
	{ return bonus; }
	
	//获取年假天数
	public int getHolidays()
	{ return holidays; }
}