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Difference Class.getConstructor and Class.getDeclaredConstructor

D Rog
Ranch Hand

Joined: Feb 07, 2004
Posts: 472

Generally problem is:
I have a class with protected default constructor, like:

I want to be able to instantiate this class, however A.class.getConstructor() throws an exception no such method. Will getDeclaredConstructor help? I notice that ReadObject implementation uses getDeclaredConstructor with following changing accessability.

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marc weber

Joined: Aug 31, 2004
Posts: 11343

getConstructor will return a Constructor reference only for a public constructor. But getDeclaredConstructor should return a Constructor reference regardless of the constructor's access level. However, to actually invoke that constructor (e.g., calling newInstance), you would need the proper access.

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D Rog
Ranch Hand

Joined: Feb 07, 2004
Posts: 472

Thanks, it was what I'd like to hear.
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subject: Difference Class.getConstructor and Class.getDeclaredConstructor
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