在我的代码中，该方法能够读取 .txt 文件并将整数放入数组的一侧，将双精度数放入另一侧。但是，在输出中存在重复项，我试图将它们按升序排列，没有重复项。public static void readFile(String file) throws FileNotFoundException{ Scanner s1 = new Scanner(new File(file)); String[][] container = new String[2][2]; int intIndex = 0; int doubleIndex = 0; while(s1.hasNextLine()) { String line = s1.nextLine(); System.out.println(line); System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~"); String[] splitLine = line.split(" "); for (String text : splitLine) { if (text.matches("\\d*")) { System.out.println(text + " is int"); if (container[0].length == intIndex) { container[0] = Arrays.copyOf(container[0], intIndex + 2); //add two more slot to int array container[1] = Arrays.copyOf(container[1], intIndex + 2); //add two more slot to double array } container[0][intIndex] = (text); //add to container intIndex++; //adjust the index } else if (text.matches("\\d*.\\d*")) { System.out.println(text + " is double"); if (container[1].length == doubleIndex) { container[0] = Arrays.copyOf(container[0], doubleIndex + 2); //add two more slot to int array container[1] = Arrays.copyOf(container[1], doubleIndex + 2); //add two more slot to double array } container[1][doubleIndex] = (text); //add to container doubleIndex++; //adjust the index } else { System.out.println(text + " is not int nor double"); } } }.txt 文件将所有内容包含在一行中，“10 5 Five 10 1.5 2 2.0 20”我期望输出为： [2, 10, 20] [1.5, 2.0]然而，我得到的实际输出是： [10, 10, 2, 20] [1.5, 2.0, null, null]
1 回答
达令说
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public static void readFile(String file) throws FileNotFoundException
{
Scanner s1 = new Scanner(new File(file));
String[][] container = new String[2][2];
int intIndex = 0;
int doubleIndex = 0;
while(s1.hasNextLine())
{
String line = s1.nextLine();
System.out.println(line);
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
String[] splitLine = line.split(" ");
for (String text : splitLine) {
if (text.matches("\\d*"))
{
System.out.println(text + " is int");
//checking the array for duplicates
if (Arrays.stream(container[0]).anyMatch(text::equals)) {
continue;
}
if (container[0].length == intIndex)
{
container[0] = Arrays.copyOf(container[0], intIndex + 2);
container[1] = Arrays.copyOf(container[1], doubleIndex + 2);
}
container[0][intIndex] = (text);
intIndex++; //adjust the index
} else if (text.matches("\\d*.\\d*"))
{
System.out.println(text + " is double");
//checking the array for duplicates
if (Arrays.stream(container[1]).anyMatch(text::equals)) {
continue;
}
if (container[1].length == doubleIndex)
{
container[0] = Arrays.copyOf(container[0], intIndex + 2);
container[1] = Arrays.copyOf(container[1], doubleIndex + 2);
}
container[1][doubleIndex] = (text);
doubleIndex++;
} else
{
System.out.println(text + " is not int nor double");
}
}
}
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
//compare numerically rather than alphabetically in sorting
Arrays.sort(container[0], Comparator.nullsLast((e1, e2) ->
Integer.valueOf(e1).compareTo(Integer.valueOf(e2))));
Arrays.sort(container[1], Comparator.nullsLast((e1, e2) ->
Double.valueOf(e1).compareTo(Double.valueOf(e2))));
System.out.println(Arrays.toString(container[0]));
System.out.println(Arrays.toString(container[1]));
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
}
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