How to add Parameters for Object using this way?

Question

Note: I'm a Beginner/Intermediate lvl java programmer so please be nice :S

I came across this lesson about how to compare 2 objects and I noticed this way of creating an object/instance which is completely new to me.

 MyValueObject myValueObject = (MyValueObject) obj;

Q: How to put my parameters to pass it to the constructor for this object using this way?

What I'm used to and most of beginners too is:

 MyClass Object = new MyClass( my parameters ) ;

Thank you.

rid · Accepted Answer · 2011-10-03 18:49:17Z

6

That's not instantiation, it's called casting. It does not create a new object, but rather it uses obj as a MyValueObject object. It basically says that obj is really a MyValueObject and it can be used as one.

answered Oct 3, 2011 at 18:49

rid

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Joe · Accepted Answer · 2011-10-03 18:49:11Z

2

MyValueObject myValueObject = (MyValueObject) obj;

doesn't create, but casts obj to a MyValueObject

answered Oct 3, 2011 at 18:49

Joe

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smp7d · Accepted Answer · 2011-10-03 18:51:11Z

0

In that first section, you are just assigning a previously instantiated object to the myValueObject variable. The object is already constructed.

answered Oct 3, 2011 at 18:51

smp7d

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