How to replace á character with empty string in Java?

Question

I am parsing CSV file, there I encounter special characters like á.

String line = scanner.nextLine();

Can any one help me to remove á and corrupted characters from the string line. I tried the following

line.replaceAll("[^a-zA-Z0-9]+","");

but it replacing :, / [ ] symbols.

 inputStream = filePart.getInputStream();
 Scanner scanner = new Scanner(inputStream);
 while (scanner.hasNextLine()) {
     String line = scanner.nextLine();
     System.out.println("Line : " + line.trim());
     String[] fields = line.split(",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)", -1);
     for (int i = fields.length - 1; i >= 0; i--) {
         System.out.println(i + " " + fields[i].replaceAll("[á]", ""));
     }

what do you mean "special characters"? You need to list out all special characters in order to replace it at all. I think no easy way to do so. — Alex
– Alex, Commented Oct 25, 2017 at 4:53
did you try writing and testing a regex in the input before using it in the program? — Saram Ali Azhar
– Saram Ali Azhar, Commented Oct 25, 2017 at 4:53
Show your input string. And what do you mean by "corrupted"? In normalized Unicode a diacritical is represented in its own code point separate from the code point of the character it modifies. For historical reasons, Unicode adopted a few dozen characters in code points from 128 to 255 (Latin-1 Supplement) that combine a character plus diacritical into a single code point. The a with acute accent is one of those, at 225. These two different ways to represent that character+diacritical may be your issue (just a guess). — Basil Bourque
– Basil Bourque, Commented Oct 25, 2017 at 5:47

Tim Biegeleisen · Accepted Answer · 2017-10-25 05:11:22Z

2

Why not just replace a positive character class containing the accented character(s):

String input = "hablá";
input = input.replaceAll("[á]", "");
System.out.println(input);

Or

input = input.replaceAll("[\\u00e1]", "");

Output:

habl

Demo

edited Oct 25, 2017 at 5:11

answered Oct 25, 2017 at 4:54

Tim Biegeleisen

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3 Comments

Gopikrishn Over a year ago

Thanks for quick reply, I tried this but not working

Tim Biegeleisen Over a year ago

@Krishna I'm surprised that didn't work. You can also try replacing using the Unicode character sequence for accented letters.

Gopikrishn Over a year ago

Hi Tim when I try with input= input.replaceAll("[^\\p{ASCII}]", ""); It works

Jesse · Accepted Answer · 2017-10-25 04:59:24Z

0

Add the characters you don't want stripped out to your regex pattern match.

e.g.

[^a-zA-Z0-9$\/\]\[\:\,]+

Will match a-z, A-Z, 0-9, /, \, ], [, :, ,, Don't forget to escape special characters in the pattern with a \

Also you can use https://regex101.com/ to check the validity of any regex you create.

answered Oct 25, 2017 at 4:59

Jesse

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Comments

Karan · Accepted Answer · 2017-12-02 03:48:43Z

0

You can use the replace method as shown below:

line = line.replace("á","");

Demo

edited Dec 2, 2017 at 3:48

answered Oct 25, 2017 at 5:14

Karan

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4 Comments

Gopikrishn Over a year ago

Tried this but still its printing aids:áassessment, Thank You

Karan Over a year ago

It is working fine, note that you need to store it back in the line variable again.

janith1024 Over a year ago

use replaceAll method to replace all characters 'replaceAll("á","")'

Karan Over a year ago

Please try the link for the program, replace method works, here is the link : rextester.com/WOJE93801

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