How do i read a file and determine the # of array elements without having to look at the text file itself?
如何读取文件并确定数组元素而不必查看文本文件本身？
String temp = fileScan.toString();
String[] tokens = temp.split("[\n]+");
// numArrayElements = ?
2 个解决方案
#1
5
Use the length property of the array:
使用数组的length属性：
int numArrayElements = tokens.length;
#2
2
The proper expression is tokens.length. So, you can assign numArrayElements like this:
正确的表达是tokens.length。因此，您可以像这样分配numArrayElements：
int numArrayElements = tokens.length;
This counts the number of elements in the tokens array. You can count the number of elements in any array in the same way.
这会计算标记数组中的元素数。您可以以相同的方式计算任何数组中的元素数。
#1
5
Use the length property of the array:
使用数组的length属性：
int numArrayElements = tokens.length;
#2
2
The proper expression is tokens.length. So, you can assign numArrayElements like this:
正确的表达是tokens.length。因此，您可以像这样分配numArrayElements：
int numArrayElements = tokens.length;
This counts the number of elements in the tokens array. You can count the number of elements in any array in the same way.
这会计算标记数组中的元素数。您可以以相同的方式计算任何数组中的元素数。