java实现简单的控制台的计算器

要用面向对象的思维写。

//我是代码的搬运工
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Number number = new Number();
        while (true) {
            if (number.toOutPut()) {
            } else {
                System.out.println("欢迎下次使用！！！");
            }
        }
    }
}
 // 定义一个Number类，三个字段分别代表第一二手动输入的字段，以及运算符
class Number {
    double double1;
    double double2;
    String sign;

    public Number() {
    }

    public Number(double double1, double double2, String sign) {
        this.double1 = double1;
        this.double2 = double2;
        this.sign = sign;
    }
    //运算流程-->
     static double result(double d1,double d2,String sign) {
        //计算结果result1 必须设一个值不然报错
        double result1 = 0;
        if (sign.equals("+")||sign=="+") {
            result1 = d1 + d2;
        } else if (sign.equals("-") || sign == "-") {
            result1 = d1 - d2;
        }
        else if (sign.equals("*") || sign == "*") {
            result1 = d1 * d2;
        }
        else if (sign.equals("/") || sign == "/") {
            result1 = d1 / d2;
        }
        else {
            //如果不是四则运算我们就设定一个边缘值继而有了如下的操作
            result1=1.7e-308;
        }
        return result1;
    }

    //
    boolean toOutPut() {
        System.out.println("亲！请您输入第一个数字哟！！！");
        Scanner input = new Scanner(System.in);
        double d1 = input.nextDouble();
        System.out.println("亲！请您输入运算符：");
        String string = input.next();
        System.out.println("亲！请您输入第二数字哟！！！");
        double d2 = input.nextDouble();
         double result = Number.result(d1, d2, string);
        String s = String.valueOf(result);
        String replace = s.replace(".0", "");
        s = replace;
        if (result == 1.7e-308) {
            System.out.println("计算结果错误，望用户老爷检查");
        } else {
            System.out.println("计算结果为"+s);
        }
        System.out.println("是否继续运算, 'Y' or 'y' 继续任意键退出");
        String str1= input.next();
        if ("Y".equals(str1) || "y".equals(str1)) {
            return true;
        } else {
            return false;
        }
    }
    // 下面都是get or set 方法以及构造方法还有重写的toString()基本
    // 上不用管
    public double getDouble1() {
        return double1;
    }

    public void setDouble1(double double1) {
        this.double1 = double1;
    }

    public double getDouble2() {
        return double2;
    }

    public void setDouble2(double double2) {
        this.double2 = double2;
    }

    public String getSign() {
        return sign;
    }

    public void setSign(String sign) {
        this.sign = sign;
    }

    @Override
    public String toString() {
        return "Number{" +
                "double1=" + double1 +
                ", double2=" + double2 +
                ", sign='" + sign + '\'' +
                '}';
    }
}