Different ways to create objects in Java
This is a trivia. Yeah, it’s a bit tricky question and people often get confused. I had searched a lot to get all my doubts cleared.
There are four different ways (I really don’t know is there a fifth way to do this) to create objects in java:
1. Using new keyword
This is the most common way to create an object in java. I read somewhere that almost 99% of objects are created in this way.
MyObject object = new MyObject();
2. Using Class.forName()
If we know the name of the class & if it has a public default constructor we can create an object in this way.
MyObject object = (MyObject) Class.forName("subin.rnd.MyObject").newInstance();
3. Using clone()
The clone() can be used to create a copy of an existing object.
MyObject anotherObject = new MyObject(); MyObject object = 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();
Now you know how to create an object. But its advised to create objects only when it is necessary to do so.