抽象类
在 Java 语言中使用 abstract class 来定义抽象类。如下实例：
Employee.java 文件代码：
/ 文件名 : Employee.java /
public abstract class Employee
{
private String name;
private String address;
private int number;
public Employee(String name, String address, int number)
{
System.out.println("Constructing an Employee");
this.name = name;
this.address = address;
this.number = number;}
public double computePay()
{
System.out.println("Inside Employee computePay");
return 0.0;}
public void mailCheck()
{
System.out.println("Mailing a check to " + this.name
+ " " + this.address);}
public String toString()
{
return name + " " + address + " " + number;}
public String getName()
{
return name;}
public String getAddress()
{
return address;}
public void setAddress(String newAddress)
{
address = newAddress;}
public int getNumber()
{
return number;}
}
