从文本文件中读取没有空格的数字（java）

Question

if we have a text file with the numbers arranged without spaces as follows:

1223443
1239866

how can each digit be read individually? since we can no longer use the hasNextInt() function.

Answer 1

Many ways to do this. For example, read in a single line from the file, then store in in some String s. Then, you can do something simple like use the split() function.

String s = "1223443 1239866";
String[] numberStrings = s.split(" ");
for (String num : numberStrings)
{
    int value = Integer.parseInt(num);
}

I suggest you read up on the split() method. It is very commonly used when parsing Strings.

To read each digit individually...

String s = "1234";
for (char c : s.toCharArray())
{
    int value = Integer.parseInt(String.valueOf(c));
}