I got into an interesting discussion in a forum where we discussed the naming of variables.

Conventions aside, I noticed that it is legal for a variable to have the name of a Unicode character. For example, the following is legal:

int \u1234;

However, if I for example gave it the name #, it produces an error. According to Sun's tutorial, it is valid if "beginning with a letter, the dollar sign "$", or the underscore character "_"."

But the Unicode 1234 is some Ethiopian character. So what is really defined as a "letter"?

java variables unicode
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