Question

我有一个for循环，可以在.txt文件（bday.readWord（））获取数据。但是我无法弄清楚如何将其调用为for循环值，因此我可以获得DayCount的不同值。我需要DayCount的五个不同的值，所以我可以对它进行排序，并能够计算出最短的日期。

for(int diffinday = 0; diffinday < myStrings.length; diffinday++) {
    // making another copy 
    bmonth = Integer.parseInt(myStrings[0]);
    bday = Integer.parseInt(myStrings[1]);
    byear = Integer.parseInt(myStrings[2]);
    LocalDate start = new LocalDate(year, month, day);
    LocalDate end = new LocalDate(year, bmonth, bday);
    int dayCount = Days.daysBetween(start, end).getDays();
    System.out.println(dayCount);

    // making an int array;
    // we can do 2 things make an if statement that
    // will identify or make an array that will store
    // the differneces in the dates!

    // we make an array that will sort out the dates

    // bad code incoming!
    // what if it were 100 lines hmmm?
    int [] myArray = new int [] { dayCount, dayCount, dayCount, dayCount, dayCount };
    myArray[diffinday] = dayCount;
    Arrays.sort(myArray);
    System.out.println(Arrays.toString(myArray));

    if(dayCount < 0) {
        System.out.println("This value is null!");              
    } else {
        // for now, we can only identify pos ints.
        // we need to make an array that will find
        // the closest date, W/O IT BEING NEGATIVE
        System.out.println("The closest birthday is " + myStrings[4]);
    }

dayCount应该是单独的 .txt 文件中的[-238, -196, -103, -76, 96] b / c，该程序应该计算日期之间的差异。自myStrings.length为5以来该程序的输出是

[-238,-238,-238,-238,-238]
[-196,-196,-196,-196,-196]
... so on and so forth

如果能够调出正确的循环值，W / O为负数，那么你也可以帮我理清DayCount。任何帮助表示赞赏。

Answer 1

您可以像这样设置数组：

int[] myArray = new int[5];

对Java说，＆＃34;我想要一个新的整数数组，它可以存储5个项目＆＃34;。

因此，您可以创建任何大小的数组：

int x = 7;
int[] myArray = new int[x]

最初将值设置为null，然后您可以使用for循环来正确设置它们。

您还可以使用ArrayList，可以动态添加和删除项目。

例如，如果我使用简单的Scanner和ArrayList，我可以执行以下操作：

Scanner scanner = new Scanner();
ArrayList<Integer> myArrayList = new ArrayList<Integer>(); //Make the ArrayList

while(scanner.hasNextInt()) {
    myArrayList.add(scanner.nextInt()); //Add an item to the ArrayList
}

for (Integer i:myArrayList) { //Loop through all items in the ArrayList
    System.out.println(i);
}

制作一个可以保存for循环数据的数组

1 个答案: