多维数组:Java

Question

我正在研究一个税收计算器,并且想要将税率括号放入多维数组中.这是我第一次尝试这样的事情,并想知道这是否是正确的做法？

private static double[][][] taxBrackets;

static {
    taxBrackets = new double[20][14][14];
/*Single*/                           /*Married*/                        /*Head of Household*/
    //TierOne                           //TierOne                           //TierOne
    taxBrackets[0][0][0] = 0;           taxBrackets[0][1][0] = 0;           taxBrackets[0][0][1] = 0;       //MIN
    taxBrackets[1][0][0] = 9075;        taxBrackets[0][2][0] = 18150;       taxBrackets[0][0][2] = 12950;   //MAX
    taxBrackets[2][0][0] = 0.10;                                                                         //Tax Rate
    //TierTwo
    taxBrackets[3][0][0] = 9076;        taxBrackets[0][3][0] = 18151;       taxBrackets[0][0][3] = 12951;   //MIN
    taxBrackets[4][0][0] = 36900;       taxBrackets[0][4][0] = 73800;       taxBrackets[0][0][4] = 49400;   //MAX
    taxBrackets[5][0][0] = 0.15;                                                                         //Tax Rate
    //TierThree
    taxBrackets[6][0][0] = 36901;       taxBrackets[0][5][0] = 73801;       taxBrackets[0][0][5] = 49401;   //MIN
    taxBrackets[7][0][0] = 89350;       taxBrackets[0][6][0] = 148850;      taxBrackets[0][0][6] = 127550;  //MAX
    taxBrackets[8][0][0] = 0.25;                                                                         //Tax Rate
    //TierFour
    taxBrackets[9][0][0] = 89351;       taxBrackets[0][7][0] = 148851;      taxBrackets[0][0][7] = 127551;  //MIN
    taxBrackets[10][0][0] = 186350;     taxBrackets[0][8][0] = 226850;      taxBrackets[0][0][8] = 206600;  //MAX
    taxBrackets[11][0][0] = 0.28;                                                                        //Tax Rate
    //TierFive
    taxBrackets[12][0][0] = 186351;     taxBrackets[0][9][0] = 226851;      taxBrackets[0][0][9] = 206601;  //MIN
    taxBrackets[13][0][0] = 405100;     taxBrackets[0][10][0] = 405100;     taxBrackets[0][0][10] = 405100; //MAX
    taxBrackets[14][0][0] = 0.33;                                                                        //Tax Rate
    //TierSix
    taxBrackets[15][0][0] = 405101;     taxBrackets[0][11][0] = 405101;     taxBrackets[0][0][11] = 405101; //MIN
    taxBrackets[16][0][0] = 406750;     taxBrackets[0][12][0] = 457600;     taxBrackets[0][0][12] = 432200; //MAX
    taxBrackets[17][0][0] = 0.35;                                                                        //Tax Rate
    //TierSeven
    taxBrackets[18][0][0] = 406751;      taxBrackets[0][13][0] = 457601;     taxBrackets[0][0][13] = 432201; //MIN
    taxBrackets[19][0][0] = 0.396;                                                                       //Tax Rate
}

我们的想法是在左侧数组中使用单个文件管理器,在中间使用Married/Joint文件管理器,在右侧数组中使用Household文件管理器头.我是否正确地做到了这一点还是完全错过了这一点？

更新:1/30/2017在遵循Nhouser9的建议后,我最终得到了更易于管理的内容.

private static class TaxBracket {

    final double minSalary;
    final double maxSalary;
    final double taxRate;

    TaxBracket(double minSalary, double maxSalary, double taxRate) {
        this.minSalary = minSalary;
        this.maxSalary = maxSalary;
        this.taxRate = taxRate;
    }
}
//This is the data structure which holds the values for each tier of each filing status
//Changing values in these arrays will affect the output of the entire program
private static TaxBracket[] singleFiler;
static {
    singleFiler = new TaxBracket[]
        {
            new TaxBracket(0, 9075, 0.10),      //Index 0 TierOne
            new TaxBracket(9076, 36900, 0.15),  //Index 1 TierTwo
            new TaxBracket(36901, 89350, 0.25), //Index 2 TierThree
            new TaxBracket(89351, 186350, 0.28),//Index 3 TierFour
            new TaxBracket(186351, 405100, 0.33),//Index 4 TierFive
            new TaxBracket(405101, 406750, 0.35),//Index 5 TierSix
            new TaxBracket(406751, Double.MAX_VALUE, 0.396)//Index 6 TierSeven
        };
}
private static TaxBracket[] jointFiler;
static {
    jointFiler = new TaxBracket[]
        {
            new TaxBracket(0, 18150, 0.10),      //Index 0 TierOne
            new TaxBracket(18151, 73800, 0.15),  //Index 1 TierTow
            new TaxBracket(73801, 148850, 0.25), //Index 2 TierThree
            new TaxBracket(148851, 226850, 0.28),//Index 3 TierFour
            new TaxBracket(226851, 405100, 0.33),//Index 4 TierFive
            new TaxBracket(405101, 457600, 0.35),//Index 5 TierSix
            new TaxBracket(457601, Double.MAX_VALUE, 0.396)//Index 6 TierSeven
        };
}
private static TaxBracket[] hohFiler;
static {
    hohFiler = new TaxBracket[]
        {
            new TaxBracket(0, 12950, 0.10),      //Index 0 TierOne
            new TaxBracket(12951, 49400, 0.15),  //Index 1 TierTow
            new TaxBracket(49401, 127550, 0.25), //Index 2 TierThree
            new TaxBracket(127551, 206600, 0.28),//Index 3 TierFour
            new TaxBracket(206601, 405100, 0.33),//Index 4 TierFive
            new TaxBracket(405101, 432200, 0.35),//Index 5 TierSix
            new TaxBracket(432201, Double.MAX_VALUE, 0.396)//Index 6 TierSeven
        };
}

Answer 1

这是一种可能的解决方案.如果它有效,那很好.

由于Java是面向对象的语言,因此最好使用Objects.例如,TaxBracket像这样的对象:

public class TaxBracket {
    public static final int SINGLE = 1;
    public static final int MARRIED = 2;
    public static final int HEAD_OF_HOUSE = 3;

    public final int mStatus;
    public final int minSalary;
    public final int maxSalary;
    public final double rate;

    public TaxBracket(int mStatus, int minSalary, int maxSalary, double rate) {
        this.mStatus = mStatus;
        this.minSalary = minSalary;
        this.maxSalary = maxSalary;
        this.taxRate = taxRate;
    }
}

然后你可以声明这些对象的单个数组而不是多维数组,像这样初始化它:

taxBrackets[0] = new TaxBracket(TaxBracket.SINGLE, 0, 9075, .1);