Passing class name as parameter

Question

I have 3 classes called RedAlert, YellowAlert, and BlueAlert.

Within my class AlertController I want to have a method like this:

public void SetAlert(//TAKE IN NAME OF CLASS HERE//)
{
    CLASSNAME anInstance = new CLASSNAME();
}

So for example I want to:

AlertController aController = new AlertController();
SetAlert(RedAlert);

How do you take in the class name as a parameter, and based on that class name create the appropriate object from the class name?

Answer 1

Using reflection it is possible. Here for a given className (passed as a string) . This class will be searched in memory ( it should be already loaded).

The name of the class to be instantiated when passed as a string should be fully qualified

void createInstanceOfClass(String className) throws ClassNotFoundException, InstantiationException, IllegalAccessException{


        Class classTemp = Class.forName(className);

        Object obj =classTemp.newInstance();



    }
}