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Shaik Jelani
object
2 Answer(s)      5 years ago
Posted in : Java Interview Questions



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May 5, 2009 at 10:47 AM


Hello,
i know only two wayes of object instansiations

1- MyClass mc = new MyClass();
2- MyClass mc1 = (MyClass) Class.forName("MyClass").newInstance();

if you know any other way then please repplly.

Thankx



May 5, 2009 at 11:13 AM


Hi Friend,

Yes we can create an object in the following different ways:

1. Using new operator :
This is the most general way of creating an object.
ClassName classObject = new ClassName();

2. Using Class.forName()
If you already know the name of the Class and it has its public default constructor. We can create the object in the

following manner :
ClassName classObject = (ClassName) Class.forName("packagename.ClassName").newInstance();

3. Using classLoader
this.getClass().getClassLoader().loadClass("packagename.ClassName").newInstance();

4. Using clone() method
We can use the clone() method to create the copy of the existing Object.
(e.g) ClassName firstObject = new ClassName();
ClassName secondObject = (ClassName) firstObject.clone();

5. Using object deserialization
Object deserialization is nothing but creating an object from its serialized form.
ObjectInputStream inStream = new ObjectInputStream(anInputStream );
ClassName classObject = (ClassName) inStream.readObject();


Thanks
RoseIndia Team


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