Creating an object without a default constructor

Question

I have a package which has some N number of classes and I'm scanning all the classes and initializing them through a method. All the classes with a default constructor are being initialized but the ones without default(zero argument) constructor throws an exception. Does anyone know how to create an object without default constructor?

P.S. I need a java code.

If your class already has at-least one custom constructor, then compiler won't create default no-args constructor. Eg: If your class has only one argument constructor, then you cannot create your object any other way other than passing args to your constructor — Pradeep Simha, Jan 28 '13 at 16:04

score 1 · Answer 1 · answered Jan 28 '13 at 16:05

1

Use Class#getConstructors() to find a defined constructor, and call that instead.

answered Jan 28 '13 at 16:05

Matt Ball

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score 1 · Answer 2 · answered Jan 28 '13 at 16:06

1

You can try looking here. It explains how to create objects using Java reflection.

Or just Google: java constructor reflection. I got this one using the "I'm feeling lucky" feature

answered Jan 28 '13 at 16:06

lucian.pantelimon

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Creating an object without a default constructor

2 Answers2