First element in array of strings is empty when using split

Question

So I'm trying to read some numbers from a file and put them into an array. I've been reading about people having problems with whitespace, so using trim, I did it like this:

String[] tokens = new String[length];
 for(int i = 0; i<length;i++){
    String line = fileReader.nextLine();
    line = line.trim();
    tokens = line.split("");
    }

But the first element this array (token[0]) becomes empty. Am I using the split function wrong?

You are converting line to character array. You want to split the given line with space? — Achintya Jha
– Achintya Jha, Commented Apr 19, 2013 at 10:40
Yes, the argument to split(...) is the (regex) delimiter. So if your input is eg. 1, 2, 4, 8 you could do split( "," ).' — Anders R. Bystrup
– Anders R. Bystrup, Commented Apr 19, 2013 at 10:42
Ok, thank you very much, I will work with the delimiter now. — Bjørn Haugerud
– Bjørn Haugerud, Commented Apr 19, 2013 at 10:43

Rik · Accepted Answer · 2013-04-19 10:43:32Z

1

You need to tell the split method what character it should split on. Try this:

tokens = line.split(" "); //split on a space character

answered Apr 19, 2013 at 10:43

Rik

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1 Comment

Bjørn Haugerud Over a year ago

Yeah! Thank you! Sometimes it's just right there in front of me!

yeh · Accepted Answer · 2013-04-19 10:43:02Z

1

tokens = line.split(" ");

You forgot whitespace.

answered Apr 19, 2013 at 10:43

yeh

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