How do you read a integer and a string seperatly from a single line in file and store them to variables?

Question

I have a text file that looks something like this:

1 Song one
2 Song two
3 Song three
...

How do I read a line by line and extract number and String separately from a single line, and let's say print them to the console with:

String title; // extracted from current line
int num; // extracted from current line    
System.out.println("Number: " + num + "Title: " + title);

https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Scanner.html — markspace, Mar 29 '20 at 21:20
Have you tried something? If so, share with us the code so that we can better guide you on the problems you are facing. — Eduardo, Mar 29 '20 at 21:21
Does this answer your question? [How to read a large text file line by line using Java?](https://stackoverflow.com/questions/5868369/how-to-read-a-large-text-file-line-by-line-using-java) — Cray, Mar 30 '20 at 07:28

score 0 · Accepted Answer · answered Mar 29 '20 at 21:33

0

How do I read a line by line

How do I extract number and String separately

Then use Integer.parseInt(...) on the first part to get number.

answered Mar 29 '20 at 21:33

Andreas

How do I implement indexOf() if i have let's say more than 100 songs and the song title begins after the number separated only by a space? – Mar 29 '20 at 21:41
You're using `indexOf` on a string containing only one line from the file, i.e. only one song, not 100 songs. – Andreas Mar 29 '20 at 21:51
I know but what i meant is, it's not the same index when i have a one digit number and when you have 3 or 4 digit number... – Mar 29 '20 at 23:42
Which is why you're calling `indexOf` first, to find the index of the space. Otherwise, why did you think I told you to call `indexOf`? What purpose would it have, if not that? I mean, you do know what it does, right? If not, which part of the documentation I linked to did you not understand? – Andreas Mar 29 '20 at 23:49

1 Answers1