Is this possible to list available alphabet of the current locale in GWT?

Is this possible to list available alphanet of t开发者_如何学Che current locale in GWT?

An idea is to define all possible alphabets in a Constants implementation:

@DefaultStringArrayValue("A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z")
String[] alphabet();