abstractdemo.java

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public class AbstractDemo 
{
	Employee e1,e2;   //声明雇员类对象e1和e2
	
	public AbstractDemo()
	{
		//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",24);
		System.out.println("name:"+e1.getName());
		e1.getInfo();
		System.out.println("Age"+e1.getAge());
		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",26);
		System.out.println("name:"+e2.getName());
		e2.getInfo();
		System.out.println("Age"+e2.getAge());		
		System.out.println("Salary"+e2.getSalary());
		System.out.println("Hireday"+e2.getHireDay()+"\n");	
	}
	
	public static void main(String[] args) 
	{
		new AbstractDemo();
	}
}

abstract class People      //自定义抽象类
{
	String name;    //姓名属性
	int age;		//年龄属性
	
    //声明抽象方法
	abstract String getName();  
	abstract int getAge();
}

class Employee extends People
{	
	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,int age)
	{
		this.name = name;
		this.salary = salary;
		this.hireDay = hireDay;
	}
	
	//用于获取雇员信息的方法
	public void getInfo()
	{ System.out.println("I'm Employee"); }
	public double getSalary()
	{ return salary; }
	public String getHireDay()
	{ return hireDay; }
	
	//实现父类中的抽象方法
	public String getName()
	{ return name; }	
	public int getAge()
	{ return age; }
}