Split lines into two Strings using BufferedReader

Question

I want to split each line into two separate strings when reading through the txt file I'm using and later store them in a HashMap. But right now I can't seem to read through the file properly. This is what a small part of my file looks like:

....
CPI       Clock Per Instruction 
CPI       Common Programming Interface [IBM]
.CPI      Code Page Information (file name extension) [MS-DOS]
CPI-C     Common Programming Interface for Communications [IBM]
CPIO      Copy In and Out [Unix]
....

And this is what my code looks like:

    try {
        BufferedReader br = new BufferedReader(new FileReader("akronymer.txt"));
        String line;

        String akronym;
        String betydning;
        while((line = br.readLine()) != null) {
            String[] linje = line.split("\\s+");

            akronym = linje[0];
            betydning = linje[1];

            System.out.println(akronym + " || " + betydning);
        }
    } catch(Exception e) {
        System.out.println("Feilen som ble fanget opp: " + e);
    }

What I want is to store the acronym in one String and the definition in another String

@PeterLawrey I think, The way OP is splitting the String on whitespaces. — Smit
– Smit, Commented Nov 26, 2013 at 19:55
@user3037979 That is because you are splitting by spaces. If you want to stop once you reach the second string, add 2 as a maximum strings argument. — Peter Lawrey
– Peter Lawrey, Commented Nov 26, 2013 at 19:57
@PeterLawrey That was my point you just mentioned in your previous comment. — Smit
– Smit, Commented Nov 26, 2013 at 19:59

rgettman · Accepted Answer · 2013-11-26 19:56:12Z

4

The problem is that whitespace in the definition is interpreted as additional fields. You're getting only the first word of the definition in linje[1] because the other words are in other array elements:

["CPI", "Clock", "Per", "Instruction"]

Supply a limit parameter in the two-arg overload of split, to stop at 2 fields:

String[] linje = line.split("\\s+", 2);

E.g. linje[0] will be CPI and linje[1] will be Clock Per Instruction.

answered Nov 26, 2013 at 19:56

rgettman

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Pshemo · Accepted Answer · 2013-11-26 19:55:54Z

4

If you want to limit your split to only two parts then use split("\\s+", 2). Now you are splitting your line on every whitespace, so every word is stored in different position.

answered Nov 26, 2013 at 19:55

Pshemo

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