JAVA 實用程式分享-01 計算台灣電費的程式

 　　這邊難得練習了一個比較實用的程式，目的是輸入度數與是否夏季，得到電費。下面有兩個類別，一個是營業用電，一個是分營業用電。 

類別：家用，即非營業用電費。

// 編寫人：Lancelot Cheng
public class HomeUseBill{
    public double degree;
    private double moneyPD, bill, aa;
    private String season;

    public HomeUseBill(String season){
        //super(degree);
        this.season = season;
    }

    public double notSummer(double degree){
        aa = 0;
        if (degree <= 120*2){
            moneyPD = 1.63;
            aa = degree*moneyPD;
        }
        if (degree > 120*2 && degree <= 330*2){
            moneyPD = 2.1;
            aa = 195.6*2 + ( degree - 120*2 )*moneyPD;
        }
        if (degree > 330*2 && degree <= 500*2){
            moneyPD = 2.89;
            aa = 636.6*2 + ( degree - 330*2 )*moneyPD;
        }
        if (degree > 500*2 && degree <= 700*2){
            moneyPD = 3.94;
            aa = 1127.9*2 + ( degree - 500*2 )*moneyPD;
        }
        if (degree > 700*2 && degree <= 1000*2){
            moneyPD = 4.6;
            aa = 1915.9*2 + ( degree - 700*2 )*moneyPD;
        }
        if (degree > 1000*2){
            moneyPD = 5.03;
            aa = 3295.9*2 + ( degree - 1000*2 )*moneyPD;
        }
        return aa;
    }

    public double summer(double degree){
        aa = 0;
        if (degree <= 120*2){
            moneyPD = 1.63;
            aa = degree*moneyPD;
        }
        if (degree > 120*2 && degree <= 330*2){
            moneyPD = 2.38;
            aa = 195.6*2 + ( degree - 120*2 )*moneyPD;
        }
        if (degree > 330*2 && degree <= 500*2){
            moneyPD = 3.52;
            aa = 695.4*2 + ( degree - 330*2 )*moneyPD;
        }
        if (degree > 500*2 && degree <= 700*2){
            moneyPD = 4.8;
            aa = 1293.8*2 + ( degree - 500*2 )*moneyPD;
        }
        if (degree > 700*2 && degree <= 1000*2){
            moneyPD = 5.66;
            aa = 2253.8*2 + ( degree - 700*2 )*moneyPD;
        }
        if (degree > 1000*2){
            moneyPD = 6.41;
            aa = 3951.8*2 + ( degree - 1000*2 )*moneyPD;
        }
        return aa;
    }

    public double fee(double degree){
        switch (season) {
            case "非夏":
                //System.out.println("非夏季用電");
                bill = notSummer(degree);
                break;
            case "夏":
                //System.out.println("夏季用電");
                bill = summer(degree);
                break;
            default:
                System.out.println("不合規定的輸入文字");
        }
        return bill;
        //System.out.println(bill);
    }
}

類別：商用，即營業用電費。

// 編寫人：Lancelot Cheng
public class BusiUseBill{
    public double degree;
    private double moneyPD, bill, aa;
    private String season;

    public BusiUseBill(String season){
        //super(degree);
        this.season = season;
    }

    public double notSummer(double degree){
        aa=0;
        if (degree <= 330*2){
            moneyPD = 2.12;
            aa = degree*moneyPD;
        }
        if (degree > 330*2 && degree <= 700*2){
            moneyPD = 2.91;
            aa = 699.6*2 + ( degree - 330*2 )*moneyPD;
        }
        if (degree > 700*2 && degree <= 1500*2){
            moneyPD = 3.44;
            aa = 1776.3*2 + ( degree - 700*2 )*moneyPD;
        }
        if (degree > 1500*2 ){
            moneyPD = 5.05;
            aa = 4528.3*2 + ( degree - 1500*2 )*moneyPD;
        }
        return aa;
    }

    public double summer(double degree){
        aa=0;
        if (degree <= 330*2){
            moneyPD = 2.53;
            aa = degree*moneyPD;
        }
        if (degree > 330*2 && degree <= 700*2){
            moneyPD = 3.55;
            aa = 834.9*2 + ( degree - 330*2 )*moneyPD;
        }
        if (degree > 700*2 && degree <= 1500*2){
            moneyPD = 4.25;
            aa = 2148.4*2 + ( degree - 700*2 )*moneyPD;
        }
        if (degree > 1500*2 ){
            moneyPD = 6.43;
            aa = 5548.4*2 + (degree - 1500*2 )*moneyPD;
        }
        return aa;
    }

    public double fee(double degree){
        //System.out.println(degree);

        switch (season) {
            case "非夏":
                //System.out.println("非夏季用電");
                bill = notSummer(degree);
                break;
            case "夏":
                //System.out.println("夏季用電");
                bill = summer(degree);
                break;
             default:
                 System.out.println("不合規定的輸入文字");
        }

        return bill;
        //System.out.println("電費 = " + degree + " * " + moneyPD + " = " + bill);
    }
}

主程式：宣告你要的物件，並實作輸入＂夏＂或是＂非夏＂的字串，使用物件的 fee 方法，輸入度數。

// 編寫人：Lancelot Cheng
public class Main {
    public static void main(String[] args) {
        
        // 非營業用
        BusiUseBill lancelotHome = new BusiUseBill( "非夏");
        // 營業用
        HomeUseBill lancelotStore = new HomeUseBill( "非夏");

        System.out.println("非營業用電費：" + lancelotHome.fee(330));
        System.out.println("營業用電費：" + lancelotStore.fee(170));
    }
}

結果:

非營業用電費：636.6
營業用電費：360.40000000000003

　　我寫完後發現有更好的寫法，不過也懶得改了，下一次寫程式之前，會多想一想。