学习大话设计模式01_简单工厂模式（简易计算器）

 1 /**

 2  * 面向对象（运算类）

 3  * 简易计算器

 4  * @author Monica

 5  *

 6  */

 7 public class Operation {

 8     private double numberA = 0;

 9     private double numberB = 0;

10     

11     //虚函数

12     public double GetResult() {

13         double result = 0;

14         return result;

15     }

16 

17     public double getNumberA() {

18         return numberA;

19     }

20 

21     public void setNumberA(double numberA) {

22         this.numberA = numberA;

23     }

24 

25     public double getNumberB() {

26         return numberB;

27     }

28 

29     public void setNumberB(double numberB) {

30         this.numberB = numberB;

31     }

32 }

 

 1 /**

 2  * 加法

 3  * @author Monica

 4  *

 5  */

 6 public class OperationAdd extends Operation {

 7     

 8     /**

 9      * 继承运算类

10      */

11     @Override

12     public double GetResult() {

13         double result = 0;

14         result = getNumberA() + getNumberB();

15         return super.GetResult();

16     }

17 }

 

 1 /**

 2  * 简单工厂模式

 3  * @author Administrator

 4  *

 5  */

 6 public class OperationFactory {

 7 

 8     public static Operation createOperate(char operate) {

 9         Operation oper = null;

10         switch (operate) {

11         case '+':

12             oper = new OperationAdd();

13             break;

14         }

15         return oper;

16     }

17 }

 

 1 public class Main {

 2 

 3     /**

 4      * @param args

 5      */

 6     public static void main(String[] args) {

 7         Operation oper; 

 8         oper = OperationFactory.createOperate('+');

 9         oper.setNumberA(1);

10         oper.setNumberB(2);

11         double result = oper.GetResult();

12     }

13 

14 }