工厂方法模式

package com.factorymethod;

/**
 * 抽象的运算类 需要提供公有的数字
 * @author 黄二狗
 *
 */
public abstract class Calculator {
   //第一个数字
    private double numberA;
   //第二个数字
    private double numberB;
    public double getNumberA() {
        return numberA;
    }
    public void setNumberA(double numberA) {
        this.numberA = numberA;
    }
    public double getNumberB() {
        return numberB;
    }
    public void setNumberB(double numberB) {
        this.numberB = numberB;
    }
    
    public abstract double getResult();
   
}

package com.factorymethod;

/**
 * 具体的加法类 减法  等类似
 * @author 黄二狗
 *
 */
public class CalculatorAdd extends Calculator{

    @Override
    public double getResult() {
       double numberA=getNumberA();
       double numberB=getNumberB();
       return numberA+numberB;
    }

}

package com.factorymethod;

public class CalculatorMinus extends Calculator{
    @Override
    public double getResult() {
       double numberA=getNumberA();
       double numberB=getNumberB();
       return numberA-numberB;
    }
}

package com.factorymethod;

public class CalculatorMultiply extends Calculator{
    @Override
    public double getResult() {
       double numberA=getNumberA();
       double numberB=getNumberB();
       return numberA*numberB;
    }
}

package com.factorymethod;

public class CalculatorDevide extends Calculator{

    @Override
    public double getResult() {
       double numberA=getNumberA();
       double numberB=getNumberB();
       return numberA/numberB;
    }
   
}

package com.factorymethod;

/**
 * 制造加法计算机的工厂  以此类推
 * @author 黄二狗
 *
 */
public class CalculatorAddFactory implements ICalculatorFactory{

    @Override
    public Calculator createCalculator() {
        return new CalculatorAdd();
    }
    
}

package com.factorymethod;

public class CalculatorMinusFactory implements ICalculatorFactory{

    @Override
    public Calculator createCalculator() {
        return new CalculatorMinus();
    }
    
}

package com.factorymethod;

public class CalculatorMultiplyFactory implements ICalculatorFactory{

    @Override
    public Calculator createCalculator() {
        
        return new CalculatorMultiply();
    }
    
    
    
}

package com.factorymethod;

public class CalculatorDevideFactory implements ICalculatorFactory{

    @Override
    public Calculator createCalculator() {
        return new CalculatorDevide();
    }
    
}

package com.factorymethod;

import com.factory.IFactory;

/**
 * 和简单工厂模式相比较  此时的客户端只需要知道计算机父类和具体的工厂
 * @author 黄二狗
 *
 */
public class Client {
 public static void main(String[] args) {
     ICalculatorFactory addFactory=new CalculatorAddFactory();
     Calculator cal=addFactory.createCalculator();
     cal.setNumberA(50);
     cal.setNumberB(40);
     double result=cal.getResult();
    System.out.println(result);
 }
}