variable_declaration ::= modifier* type variable_declarator ("," variable_declarator)* ";"
modifier ::= "public" | "private" | "protected" | "static" | "final" | "native" |  "synchronized" | "abstract" | "threadsafe" | "transient"
type ::= type_specifier ("[" "]")*
type_specifier  ::= "boolean" | "byte" | "char" | "short" | "int" | "float" | "long"  | "double" | class_name | interface_name
variable_declarator ::= identifier  ( | ("=" variable_initializer) )
identifier ::= "a..z,$,_" ( "a..z,$,_,0..9,unicode character over 00C0" )*
variable_initializer ::= expression |  "{"  variable_initializer  ( "," variable_initializer )*   "}"