Question

使用Java的第一天，当我将数组索引添加到变量minIndex时，我在for循环中收到错误。我不确定将什么放入（）中的值。我试过我，但那不起作用，由于我缺乏java知识，我不确定。我可以请一些指导。

public static int minPosition(double[] list) {
     double leastNum;
     leastNum = list[0];
     // leastNum starts at first number in array
     int minIndex;
     minIndex = 1;
     // minIndex starts at 1 as if first number in Array happens to be the lowest, its index will be one
     for ( int i = 0; i < list.length; i++)
         if (list[i] < leastNum)
             leastNum = list[i];
             minIndex = list.indexof(i);
     return minIndex;

Answer 1

i是索引。

变化

minIndex = list.indexof(i);

到

minIndex = i;

您还应该更改

minIndex = 1;

到

minIndex = 0;

因为数组的第一个索引是0。

如评论所述，你有一些缺少花括号。这是完整的代码：

public static int minPosition(double[] list) {
     double leastNum = list[0];
     // leastNum starts at first number in array
     int minIndex = 0;
     // minIndex starts at 0 as if first number in Array happens to be the lowest, its index will be one
     for ( int i = 0; i < list.length; i++) // you can also start with i = 1
                                            // since you initialize leastNum
                                            // with the first element
         if (list[i] < leastNum) {
             leastNum = list[i];
             minIndex = i;
         }
     return minIndex;
}

Answer 2

原始数组indexof()中没有这样的方法：

public static int minPosition(double[] list) {
     int minIndex = 0;//replaced
     double leastNum = list[minIndex];//replaced
     for ( int i = 1; i < list.length; i++) {//braces recommended, also `i` starts with `1`
         if (list[i] < leastNum) {//braces required, since you have more than one line to execute
             leastNum = list[i];
             minIndex = i;//replaced
         }
     }
     return minIndex;
}

将数组索引号分配给for循环java中的变量

2 个答案: