采用字符串数组并返回整数的静态方法

Question

我仍然是编程的新手，我正在尝试这个小程序，我编写一个静态方法，它接受一个字符串数组并返回一个整数。从那里我必须找到最小/最短字符串的索引位置并返回该索引值。我完全迷失了，并为此苦苦挣扎。我可以得到一些帮助吗？

我的代码到目前为止......

public class test 
{

    public static void main(String [] args) 
    {
      String [] Month = {"July", "August", "September", "October"};
        smallest(Month);
        System.out.println("The shortest word is " + smallest(Month));
    }

    public static String smallest(String Month[]) 
    {
        String first = Month[0];
        for (int i = 1 ; i < Month.length ; i++) 
        {
            if (Month[i].length()<first.length())
             {
                first = Month[i];
            } 
        } 
        return first;
    }
}

Answer 1

检查下面的代码，

public class Test {
    public static void main(String [] args) 
    {
      String [] month = {"July", "August", "September", "October"};
     //   smallest(Month);
        System.out.println("The shortest word index position is " + smallest(month));
    }

    public static int smallest(String Month[]) 
    {
        String first = Month[0];
        int position=0;
        for (int i = 1 ; i < Month.length ; i++) 
        {
            if (Month[i].length()<first.length())
             {
                first = Month[i];
                position=i;
            } 
        } 
        return position;
    }

}

Answer 2

你的代码实际上非常接近，但是 - 如果我理解你的任务正确 - 而不是实际的最小元素，你应该只跟踪索引，因为这是你想要返回的结果。

public static int smallest(String[] months) {
    int first = 0;
    for (int i = 1; i < months.length; i++) {
        if (months[i].length() < months[first].length()) {
            first = i;
        } 
    } 
    return first;
}

Answer 3

专注于smallest方法。

public static void smallest(String[] month) {
    // since we have no knowledge about the array yet, lets
    // say that the currently known shortest string has
    // size = largest possible int value java can store 
    int min_length = Integer.MAX_INT, min_length_idx = -1;
    for (int i = 0; i < month.length; i++) {
        // is this current string a candidate for a new minimum?
        if (month[i].length() < min_length) {
            // if so, lets keep track of the length so that future
            // indices can be compared against it
            min_length = month[i].length();
            min_length_idx = i;
        }
    } 
    return min_length_idx;
}

然后，该方法还将涵盖数组中没有任何字符串的情况，即空数组。

Answer 4

public static int smallest(String month[]) {
   int smallest = 0;
   for ( int i=0; i<month.length; i++ {
     if (...) {
       smallest = i;
     }
   }
   return smallest;
}

注意：使用标准约定，其中变量名称以小写字母开头。