A DESCRIPTION OF THE REQUEST :
when exception is thrown from applyPattern, there is no information about what caused it

} catch (Exception e) {
     throw new IllegalArgumentException();
}

JUSTIFICATION :
this exception should contain information on cause so developers of client code can understand the cause problem

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
thrown exceptions should contain cause exception and some description
ACTUAL -
there is no information about what caused the exception

---------- BEGIN SOURCE ----------
import java.text.ChoiceFormat;

public class FormatTest{
public static void main(String[] args){
new ChoiceFormat("{0,choice,0#a|1#b}");
}
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
debuging ChoiceFormat.applyPattern(String) and running it step-by-step gives some information on problem