In how many ways an object can be created in Java?

1.	In how many ways an object can be created in Java?
Answer» There are several ways we can create an object in JAVA. 1. A new object can be created using the new operator on the class calling ONE of its constructors. MyClass o = new MyClass(); 2. We can create an object using the Java reflection API - Class.newInstance() if the class has a default constructor. If the class has multiple constructors that take parameters, we can get the corresponding constructor using Class.getConstructor() method and invoke that to create a new object. MyClass o = MyClass.class.newInstance(); MyClass o = MyClass.class .getConstructor(int.class) .newInstance(10); 3. We can invoke clone method on an object to create a duplicate object. MyClass o = new MyClass(); MyClass b = (MyClass)o.clone(); 4. If a state of that object is AVAILABLE in a serialized form, we can DESERIALIZE it to create a new object having the same state. ObjectInputStream is = new ObjectInputStream(anIStream); MyClass o = (MyClass) is.readObject();

Answer»

There are several ways we can create an object in JAVA.

1. A new object can be created using the new operator on the class calling ONE of

its constructors. MyClass o = new MyClass();

2. We can create an object using the Java reflection API - Class.newInstance() if the class has a default constructor. If the class has multiple constructors that take parameters, we can get the corresponding constructor using Class.getConstructor() method and invoke that to create a new object. MyClass o = MyClass.class.newInstance(); MyClass o = MyClass.class

.getConstructor(int.class) .newInstance(10);

3. We can invoke clone method on an object to create a duplicate object.

MyClass o = new MyClass(); MyClass b = (MyClass)o.clone();

4. If a state of that object is AVAILABLE in a serialized form, we can DESERIALIZE it to

create a new object having the same state. ObjectInputStream is = new ObjectInputStream(anIStream); MyClass o = (MyClass) is.readObject();

In how many ways an object can be created in Java?

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