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Editorial Team
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Asked: 2026-05-23T19:44:58+00:00

I have created a clone of an object in my code. Class<?> oc =

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I have created a clone of an object in my code.

Class<?> oc = o.getClass();
Object preStateInstance = oc.newInstance();

Now I have to output a Java file and I would like the created file to have an assignment of that cloned instance. Something like:

Object varX = preStateInstance.value;

Is that possible? How?

What I am trying to do is to create test cases. I want to save an instance of the object under test as a pre state value, in order to be able to compare the before and after state of an object. I have done it in my code, now I need to output it to a JUnit file. On the class that handles JUnit file writing I only have access to preStateInstance.

EDIT: I think I still have not made myself clear. My JUnit writer requires me to pass on a string so that he will output it to a complete JUnit file. After cloning the instance I would have to tell my writer how to initialise it in it’s file.

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1 Answer

  1. Editorial Team

    To create a clone you’ll have to implement the Cloneable Interface and a clone method which creates the new object and copies the necessary attributes.

    For your Unit-Tests however, I’d recommand some kind of serialization, have a look at XStream (http://x-stream.github.io/) It converts an object into XML and vice versa, allowing you to even edit the XML in between – just perfect for test cases IMHO.

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