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In how many ways can we create object in Java?
In Java, there are six different ways to create objects:
Using the new
keyword
This is the most common and straightforward method, where the new
keyword is used to call a constructor of the class, either parameterized or non-parameterized235.
Using newInstance()
method of Class
class
This method involves using the newInstance()
method of the Class
class to create an object. It requires the class to have a public no-arg constructor235.
Using newInstance()
method of Constructor
class
Similar to the previous method but uses the newInstance()
method of the Constructor
class, which can also handle parameterized constructors235.
Using the clone()
method
This method involves creating a copy of an existing object by implementing the Cloneable
interface and overriding the clone()
method in the class235.
Using Deserialization
This method involves creating an object from a serialized byte stream. The class must implement the Serializable
interface, and the object is recreated without calling any constructors235.
Using the Factory Method Pattern
This pattern involves defining an abstract class or interface and using factory methods to create objects of different classes that implement this interface or extend this abstract class235.
These six methods provide various approaches to object creation in Java, each with its own use cases and requirements.