How to split String by taking space's in java

Question

I know its very easy to split data in strings, but still i want guide to concate string, my data is in the format. In my string the data is in the above format

104
inNetStandardGuest
windowsGuest
uestToolsTooOld


121
slesGuest
guestToolsTooOld
20569355609

Expected Output:

104,inNetStandardGuest,windowsGuest,uestToolsTooOld
121,slesGuest,guestToolsTooOld,20569355609

FThompson · Accepted Answer · 2012-08-09 10:02:29Z

5

It's simply splitting and combining strings.

StringBuilder out = new StringBuilder();
for (String set : data.split("\n\n\n")) {
    for (String line : set.split("\n")) {
        out.append(line).append(',');
    }
    out.setCharAt(out.length(), '\n');
}
System.out.println(out);

edited Aug 9, 2012 at 10:02

answered Aug 9, 2012 at 9:40

FThompson

28.8k13 gold badges63 silver badges95 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

cl-r Over a year ago

+1 for use of StringBuilder, but you can also use out.setCharAt(out.length(), '\n'); (and remove deleteCharAt line)

Aaron Digulla Over a year ago

If you used "\n\n+" for the outer pattern, any number of empty lines would separate two blocks.

FThompson Over a year ago

True, but no reason to check for that if the data format is unchanging.

KARASZI István · Accepted Answer · 2012-08-09 09:41:14Z

2

With Guava's Splitter and Joiner:

final Iterable<String> lines = Splitter.on("\n\n\n").split(input);
for (final String line : lines) {
  final Iterable<String> fields = Splitter.on("\n").split(line);
  final String joined = Joiner.on(",").join(fields);
}

answered Aug 9, 2012 at 9:41

KARASZI István

31.5k9 gold badges106 silver badges133 bronze badges

Comments

Jon Lin · Accepted Answer · 2012-08-09 09:43:37Z

1

How about this?

String s = "104\n" +
           "inNetStandardGuest\n" +
           "windowsGuest\n" +
           "uestToolsTooOld\n" +
           "\n" +
           "\n" +
           "121\n" +
           "slesGuest\n" +
           "guestToolsTooOld\n" +
           "20569355609\n";

System.out.println(s.replaceAll("(.)\\n","$1,")
                    .replaceAll(",,","\n")
                    .replaceAll(",\\n","\n"));

Probably not the most efficient way, though.

answered Aug 9, 2012 at 9:43

Jon Lin

144k29 gold badges226 silver badges224 bronze badges

Comments

apocalypse · Accepted Answer · 2012-08-09 09:40:46Z

0

Buffered reader: http://docs.oracle.com/javase/1.4.2/docs/api/java/io/BufferedReader.html

readLine() method: http://docs.oracle.com/javase/1.4.2/docs/api/java/io/BufferedReader.html#readLine()

For example you read 4 lines

  string outputLine = line1 + "," + line2 + "," + line3 + "," + line4;

Then read 2 lines and skip it.

If you don't know how to implement it using my advices, you should read some basics tutorial.

answered Aug 9, 2012 at 9:40

apocalypse

5,91410 gold badges50 silver badges97 bronze badges

Comments

Nandkumar Tekale · Accepted Answer · 2012-08-09 09:57:26Z

0

Try this :

String str = "104\ninNetStandardGuest\nwindowsGuest\nuestToolsTooOld\n\n\n121\nslesGuest\nguestToolsTooOld\n20569355609";
str= str.replaceAll("\\s", ",").replaceAll(",,,", "\n");
System.out.println(str);

Output :

104,inNetStandardGuest,windowsGuest,uestToolsTooOld
121,slesGuest,guestToolsTooOld,20569355609

edited Aug 9, 2012 at 9:57

answered Aug 9, 2012 at 9:50

Nandkumar Tekale

16.2k8 gold badges61 silver badges86 bronze badges

Collectives™ on Stack Overflow

How to split String by taking space's in java

5 Answers 5

3 Comments

Comments

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

3 Comments

Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related