Check String whether it contains only Latin characters?

Question

Greetings,

I am developing GWT application where user can enter his details in Japanese. But the \'userid\' and \'password\' should only contain English characters(L

Answer 1

There might be a better approach, but you could load a collection with whatever you deem to be acceptable characters, and then check each character in the username/password field against that collection.

Pseudo:

foreach (character in username)
{
    if !allowedCharacters.contains(character)
    {
        throw exception
    }
}