Check programmatically if encoding is supported

Question

Is there a way to find out if an encoding is supported or not? E. g. a method like this:

isSupported("UTF-8") == true

and

isSupported("UTF-13") == false

I need this to validate if the Content-Disposition-Header of my MimeMessages is correct.

jlordo · Accepted Answer · 2013-07-08 10:06:04Z

11

Try the following:

Charset.isSupported("UTF-8")

this method may throw RuntimeExceptions when name is null or the name is invalid.

edited Jul 8, 2013 at 10:06

jlordo

37.9k7 gold badges63 silver badges84 bronze badges

answered Jul 8, 2013 at 10:00

Uwe Plonus

9,9944 gold badges46 silver badges49 bronze badges

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

3 Comments

jlordo Over a year ago

+1, How could I have overlooked that in Javadoc... Still, it could throw a IllegalCharsetNameException if the given charset name is illegal

Uwe Plonus Over a year ago

@jlordo As I wrote it can throw a RuntimeException when the name is invalid.

jlordo Over a year ago

The typo I fixed in your answer (of/or) confused me..., sorry.

jlordo · Accepted Answer · 2013-07-08 10:03:50Z

6

boolean isCharsetSupported(String name) {
  try {
    Charset.forName(name);
    return true;
  } catch (UnsupportedCharsetException | IllegalCharsetNameException | IllegalArgumentException e) {
    return false;
  }
}

or without a try/catch block:

boolean isCharsetSupported(String name) {
    return Charset.availableCharsets().keySet().contains(name);
}

edited Jul 8, 2013 at 10:03

answered Jul 8, 2013 at 9:57

jlordo

37.9k7 gold badges63 silver badges84 bronze badges

2 Comments

woezelmann Over a year ago

I've hoped for something without exceptions, but thanks anyway ;)

Uwe Plonus Over a year ago

Using Exceptions as flow control is discouraged in Java.

Collectives™ on Stack Overflow

Check programmatically if encoding is supported

2 Answers 2

3 Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related