java繼承抽象類

Java具有簡單性、面向對象、分佈式、健壯性、安全性、獨立與可移植性、多線程、動態性等特點。Java可以編寫桌面應用程序、Web應用程序、分佈式系統和嵌入式系統應用程序等。以下是小編為大家搜索整理的`java繼承抽象類，歡迎大家閲讀!更多精彩內容請及時關注我們應屆畢業生考試網!

/* 文件名 : */

public class Salary extends Employee

{

private double salary; //Annual salary

public Salary(String name, String address, int number, double

salary)

{

super(name, address, number);

setSalary(salary);

}

public void mailCheck()

{

tln("Within mailCheck of Salary class ");

tln("Mailing check to " + getName()

+ " with salary " + salary);

}

public double getSalary()

{

return salary;

}

public void setSalary(double newSalary)

{

if(newSalary >= 0.0)

{

salary = newSalary;

}

}

public double computePay()

{

tln("Computing salary pay for " + getName());

return salary/52;

}

}

儘管我們不能實例化一個Employee類的對象，但是如果我們實例化一個Salary類對象，該對象將從Employee類繼承3個成員變量和7個成員方法。

/* 文件名 : */

public class AbstractDemo

{

public static void main(String [] args)

{

Salary s = new Salary("Mohd Mohtashim", "Ambehta, UP", 3, 3600.00);

Employee e = new Salary("John Adams", "Boston, MA", 2, 2400.00);

tln("Call mailCheck using Salary reference --");

Check();

tln(" Call mailCheck using Employee reference--");

Check();

}

}

以上程序編譯運行結果如下：

Constructing an Employee

Constructing an Employee

Call mailCheck using Salary reference --

Within mailCheck of Salary class

Mailing check to Mohd Mohtashim with salary 3600.0

Call mailCheck using Employee reference--

Within mailCheck of Salary class

Mailing check to John Adams with salary 2400.