Create another instance of a dynamically loaded class - Java

Question

So I have created an instance of a class by searching through jar files with no problems, I have it set to create an instance using c.newInstance() (Is instance the right word to use here?)

Later on in the program I may want to create another instance of that class if a certain event occurs. How can I go about creating this without having to search through all of the Jar files until I find the right one and then creating it again? Is there a way to create it somehow if I still have a reference to the first one?

Please assume that I do not know the name of the classes that will be loaded until runtime and there will be multiple classes that will be loaded.

Thanks

Haha, 3 people all with the correct answer. How do I choose? — tgrosinger
– tgrosinger, Commented Apr 26, 2011 at 20:35
do you find yourself referring to a particular one as you form the answer? — rajah9
– rajah9, Commented Apr 26, 2011 at 20:41

Bala R · Accepted Answer · 2011-04-26 20:32:19Z

4

Save a reference to the Class of your object

Class c = dynamicObject.getClass();

and

and you can create a new instance like this (assuming there is a parameterless constructor)

Object anotherDynamicObject = c.newInstance(); // you can cast accordingly

else, say there is a consturctor that takes int, you can do

Constructor constructor = c.getConstructor(int.class);
Object anotherDynamicObject = constructor.newInstance(1);

answered Apr 26, 2011 at 20:32

Bala R

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Jay · Accepted Answer · 2011-04-26 20:31:48Z

2

Assuming "x" is the object you created ...

x.getClass().newInstance();

answered Apr 26, 2011 at 20:31

Jay

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