奇怪的,特定于代码的问题,可能是逻辑错误?

时间:2013-09-07 03:19:35

标签: java android

好的,所以我有一个程序需要三位数字,并计算每个数字0-9在所有输入的数字中出现的次数,并给出每个数字的百分比。出于某种原因,当我输入“111”或“222”之类的数字时,它可以正常工作并将该数字百分比设置为100%。如果我添加另一个数字,如“123”,它会将所有百分比作为零返回。这是代码:

声明:

private List<PickThreeNumbers> numberList = new ArrayList();
private static int[] timesOccured = {0,0,0,0,0,0,0,0,0,0};
private static double[] percentages = {0,0,0,0,0,0,0,0,0,0};
private static int totalNumbers;
private DecimalFormat dm = new DecimalFormat("0.00");
private static String percentage, timesOccuredString;

这计算每个数字出现在数字列表中的次数:

    private void calculateTimesOccured(){
    resetAllCalculations();
    for(int i = 0; i < numberList.size();i++){
        for(int r = 1; r <=3; r++){
            for(int b = 0; b <=9; b++){
                if (numberList.get(i).getSingleDigit(r) == b){
                    timesOccured[b]+=1;
                }
            }
        }
    }
}

然后,计算百分比:

private void calculatePercentages(){
    for(int w = 0; w < timesOccured.length; w++){
        totalNumbers+=timesOccured[w];
    }

    for(int e = 0; e < percentages.length; e++){
        percentages[e] = timesOccured[e] / totalNumbers;
        percentages[e]*=100;
    }
}

然后,这会将百分比返回到主要活动:

public String getPercentage(int digit){
    for(int t = 0; t<percentages.length;t++){
        if(digit == t){
            percentage= dm.format(percentages[t]);
        }
    }
    return percentage;
}

最后,这是主要活动类中动态生成表的方法:

percentages.setStretchAllColumns(true);
    percentages.removeAllViews();
    for(int i = 0; i <=9; i++){
        TableRow tr = new TableRow(this);
        TextView digit = new TextView(this);
        TextView timesOccured = new TextView(this);
        TextView percent = new TextView(this);

        digit.setText(String.valueOf(i)+":");
        timesOccured.setText(numbers.getTimesOccuredString(i));
        percent.setText(numbers.getPercentage(i));

        digit.setTextColor(Color.WHITE);
        timesOccured.setTextColor(Color.WHITE);
        percent.setTextColor(Color.WHITE);

        tr.addView(digit);
        tr.addView(timesOccured);
        tr.addView(percent);

        if(i%2 != 0){
            tr.setBackgroundColor(Color.parseColor("#333333"));
        }else{
            tr.setBackgroundColor(Color.parseColor("#444444"));
        }

        percentages.addView(tr);
    }

这是主要活动类中的声明:

TableLayout numbersEntered, percentages, recommendedNumbers;
NumberHandler numbers;

在OnCreate方法中使用它:

 numbersEntered = (TableLayout)findViewById(R.id.enteredNumbersTable);
    percentages = (TableLayout)findViewById(R.id.percentagesTable);
    recommendedNumbers=(TableLayout)findViewById(R.id.recNumbersTable);
    numbers = new NumberHandler();

Nomatter会发生什么,如果我输入多个特定数字(例如,如果我输入“222”,“222”,它的工作原理是将“2”设置为“100%”,但如果我添加任何其他数字它将它们全部设为零。)

有什么想法吗?

1 个答案:

答案 0 :(得分:1)

在calculatePercentages中,您需要将被分割的数字转换为双精度数。你正在做整数数学,要么是0还是1。

percentages[e] = (double)timesOccured[e] / (double)totalNumbers;