Calculator.java

package designpattern.creation.factory.simple;

/**
 * 使用工厂方法生成实例完成运算操作
 *
 * @author yangll
 */
public class Calculator {
    public static void main(String[] args) {
        Operation operation;
        char operator;

        operator = '+';
        operation = OperationFactory.createOperation(operator);
        operation.numberA = 1.2;
        operation.numberB = 2.3;

        System.out.println(operation.result());
    }
}