Thursday, February 26, 2015

how to maintain a list of static class and the instanciate from them








hello,








I have a list of uninstanciated class types and I wanted to call a static function from these







"Class<? extends PropControl>" (without using reflection) that would create a new corresponding object instance







but it appears I cant do that in java








so now I want to create a factory that takes a class type as aparameter to create the corresponding object instance








but this code dont compile:












Java Code:











public PropControl Create(Class<? extends PropControl> cls)
{
if(cls==HouseControl.class) <---- ERROR
{
here I create a new instance of HouseControl (that inherits PropControl)
}
}









I get this error :



incomparable types: Class<CAP#1> and Class<HouseControl>







where CAP#1 is a fresh type-variable:







CAP#1 extends PropControl from capture of ? extends PropControl








how do I achieve this ?








thanks















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