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 }
