Question

我有一个简单的文本文件，如下所示：

2-4
3-8
5-6
1-9

我想检查传递的数字是否在这些间隔内。目前我有这样的事情：

int first = 2; //passed to the method
int second = 4; // passed to the method

while ((newLine = bufferReader.readLine()) != null) {
    String[] result = newLine.split("-");

    int numberOne = Character.getNumericValue(result[0]);
    int numberTwo = Character.getNumericValue(result[1]);

    if ((first >= numberOne && first <= numberTwo) && (second >= numberOne && second <= numberTwo)) {
        System.out.println("Numbers are between " + numberOne + " and " + numberTwo);
    }
}

现在打印结果如下：

Numbers are between 2 and 4
Numbers are between 1 and 9

我想要打印的只是：Numbers are between 2 and 4。

以下是一些例子：

passing 1 and 2 would print out: Numbers are between 1 and 9
passing 5 and 6 would print out: Numbers are between 5 and 6
passing 4 and 8 would print out: Numbers are between 3 and 8

希望你明白这一点。

Answer 1

你检查条件没问题。只有你需要打破;一旦找到提供的值所在的匹配数字，就从循环开始。

Answer 2

试试这个。它应该只打印第一行。

if ((first >= numberOne && first <= numberTwo) && (second >= numberOne && second <=     numberTwo)) {
        System.out.println("Numbers are between " + numberOne + " and " + numberTwo);
        break;
}

Answer 3

如果输入已排序，您只需要打破有效结果的循环。

否则，您将所有有效结果存储在List中，并且在循环结束后，您只需选择结果列表中的最小范围。

...
    List<int[]> resultList = new ArrayList<int[]>
    while ((newLine = bufferReader.readLine()) != null) {
        String[] result = newLine.split("-");
        int numberOne = Character.getNumericValue(result[0]);
        int numberTwo = Character.getNumericValue(result[1]);
        if ((first >= numberOne && first <= numberTwo) && (second >= numberOne && second <= numberTwo)) {
            resultList.add(new int[2]{numberOne,nunumberTwo});
        }
    }
    if(!resultList.isEmpty()){
        int[] smallestInterval = null;
        int minInterval = 0;
        for(int[] result : resultList){
            int inerval = result[1]-result[0]
            if(smallestInterval==null || inerval < smallestInterval){
                minInterval = inerval;
                smallestInterval= result;
            }
        }
        System.out.println("Numbers are between " + smallestInterval[0] + " and " + smallestInterval[1]);
    }

如果数字在区间内，则为java

3 个答案: