Sunday, May 17, 2015

What are all the different ways to create an object in Java?

There are four ways to create a Object in Java. They are

1. Using new keyword - This is the most common way to create an object in java.
MyObject object = new MyObject();

2. Using Class.forName() - If we know the name of the class and if it has a public default constructor we can create an object in this way.
MyObject object = (MyObject) Class.forName("com.ranga.MyObject").newInstance();

3. Using clone() - The clone() can be used to create a copy of an existing object.
MyObject anotherObject = new MyObject();
MyObject object = (MyObject) anotherObject.clone();

4. Using object deserialization - Object deserialization is nothing but creating an object from its serialized form.
ObjectInputStream inStream = new ObjectInputStream(anInputStream );
MyObject object = (MyObject) inStream.readObject();