parse string to remove spaces java

Question

I need some help parsing a string that is input to one that is later cleaned and output.

e.g.

String str = " tHis  strIng is  rEalLy mEssy  "

and what I need to do is have it parsed from that to look like this:

"ThisStringIsReallyMessy"

so I basically need to clean it up then set only the first letter of every word to capitals, without having it break in case someone uses numbers.

Brian Agnew · Answer 1 · 2012-09-25T17:00:48.860

5

Apache Commons to the rescue (again). As always, it's worth checking out the Commons libraries not just for this particular issue, but for a lot of functionality.

You can use Apache Commons WordUtils.capitalize() to capitalise each word within the string. Then a replaceAll(" ", "") will bin your whitespace.

String result = WordUtils.capitalize(str).replaceAll(" ", "");

Note (other) Brian's comments below re. the choices behind replace() vs replaceAll().

edited Sep 25 '12 at 17:00

answered Sep 25 '12 at 16:55

Brian Agnew

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Note that `replaceAll` takes a regex. Use `replace` for non-regex replacement since it's faster and does the same thing. Also on that note, `replaceAll("\\s+", "")` will also replace tabs and other whitespace besides the space character. – Brian Sep 25 '12 at 17:03
@Brian - I've amended my answer to refer to your comment above. Thx – Brian Agnew Sep 25 '12 at 17:04

score 4 · Answer 2 · edited May 23 '17 at 12:18

4

   String str = " tHis  strIng is  rEalLy mEssy  ";
   str =str.replace(" ", "");
   System.out.println(str);

output:

tHisstrIngisrEalLymEssy

For capitalizing first letter in each word there is no in-built function available, this thread has possible solutions.

edited May 23 '17 at 12:18

Community

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answered Sep 25 '12 at 16:49

kosa

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This does not fix the casing. – hmjd Sep 25 '12 at 16:50

score 4 · Accepted Answer · answered Sep 25 '12 at 16:58

String[] tokens = " tHis  strIng is  rEalLy mEssy  ".split(" ");
StringBuilder result = new StringBuilder();
for(String token : tokens) {
    if(!token.isEmpty()) {
        result.append(token.substring(0, 1).toUpperCase()).append(token.substring(1).toLowerCase());
     }
}
System.out.println(result.toString()); // ThisStringIsReallyMessy

score 0 · Answer 4 · answered Sep 25 '12 at 16:50

0

Do you mean this?

str = str.replaceAll(" ", "");

answered Sep 25 '12 at 16:50

Sebastian vom Meer

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parse string to remove spaces java

4 Answers4