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Hey guys in this post, we will see the 5 different ways of creating objects in java. Let’s discuss it one by one –

5 Different ways

Following are the different ways to create a java object.

Using new keyword

• This is the most common way to create an object in java
• By using this approach we can call any constructor we want to call

MyClass myClass = new MyClass();

Using newInstance() method of class

• We can also use the newInstance() method of a Class class to create an object. The newInstance() calls the no-argument constructor to create the object.
• We can create an object by newInstance() in the following way

MyClass myClass = (MyClass) Class.forName("MyClass").newInstance();

Using clone()

• Whenever we call clone() on any object JVM actually creates a new object for us and copies all content of the previous object into it.
• Creating an object using the clone() does not invoke any constructor

MyClass myClass = new MyClass();
MyClass temp = (MyClass) myClass.clone();

Using object deserialization

• Object deserialization is nothing but creating an object from its serialized form
• whenever we serialize and then deserialize an object, JVM creates a separate object
• In deserialization, JVM doesn’t use any constructor to create the object

ObjectInputStream stream = new ObjectInputStream(anInputStream);
MyClass myClass = (MyClass) stream.readObject();

Using newInstance() of constructor class

• Similar to the newInstance() of Class class, There is one newInstance() in the java.lang.reflect.Constructor class which we can use to create an object
• we can also use the parameterized constructor and private constructor by using this newInstance() method

Constructor constructor = Test.class.getDeclaredConstructor();
Test obj = constructor.newInstance();