Efficient way to calculate byte length of a character, depending on the encoding
- by BalusC
What's the most efficient way to calculate the byte length of a character, taking the character encoding into account? In UTF-8 for example the characters have a variable byte length, so each character needs to be determined individually. As far now I've come up with this:
char c = getItSomehow();
String encoding = "UTF-8";
int length = new String(new char[] { c }).getBytes(encoding).length;
But this is clumsy and inefficient in a loop since a new String needs to be created everytime. I can't find other and more efficient ways in the Java API. I imagine that this can be done with bitwise operations like bit shifting, but that's my weak point and I'm unsure how to take the encoding into account here :)
If you question the need for this, check this topic.
