How do I sepzrate by commas and newline?

Question

How does one convert something like this (assuming I'm using a Buffered Reader to read in the info?):

0, blah, hi\n
1, bluh, test

To this:

String[] testArray:
0, blah, hi, 1, bluh, test

If that makes any sense? Basically removing the commas and newlines and inserting each different word into its own element.

What did you try so far? A basic way would be to read everything into a single string and then split by newlines and commas (hint: the `String` class has methods for this). — Thomas, Dec 08 '16 at 10:08
Yes , it is possible... but you have to define the merging order. .in the example you post makes not much sense — ΦXocę 웃 Пepeúpa ツ, Dec 08 '16 at 10:08
Just read each line, split on the coma and concat each resulting array (using a list will be simpler). I let you write the code — AxelH, Dec 08 '16 at 10:11
Did you even search online? http://stackoverflow.com/questions/22350683/how-to-split-a-comma-delimited-string-into-an-array-of-empty-strings http://stackoverflow.com/questions/7488643/how-to-convert-comma-separated-string-to-arraylist http://stackoverflow.com/questions/10631715/how-to-split-a-comma-separated-string — denvercoder9, Dec 08 '16 at 10:13

score 0 · Answer 1 · answered Dec 08 '16 at 10:12

A naive implementation:

List<String> tokens = new ArrayList<>();
for (String line = in.readLine(); line != null; line = in.readLine()) {
    for (String token: line.split(",\\s*")) {
        tokens.add(token);
    }
}
String[] testArray = tokens.toArray(new String[tokens.size()]);

score 0 · Answer 2 · answered Dec 08 '16 at 10:23

It's much easier to do such things with a Scanner with a custom delimiter than reinventing the wheel, IMHO:

String str = "0, blah, hi\n1, bluh, test";
Reader reader = new StringReader(str); // Just an example, any Reader would work
Scanner scanner = new Scanner(reader).useDelimiter(", ");
List<String> tmpList = new LinkedList<>();
scanner.forEachRemaining(tmpList::add);
String[] array = tmpList.toArray(new String[tmpList.size()]);

score 0 · Answer 3 · answered Dec 08 '16 at 10:28

0

Here's an answer for Java 8.

String[] array = Files.newBufferedReader(PATH_OF_THE_FILE)
    .lines()
    .flatMap(string -> java.util.stream.Stream.of(string.split(",\\s")))
    .collect(Collectors.toList())
    .toArray(new String[0]);

answered Dec 08 '16 at 10:28

choasia

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How do I sepzrate by commas and newline?

3 Answers3