Instance initializer block
Instance Initializer block is used to initialize the instance data member. It run each time when object of the class
Super Keyword in Java
The super keyword in Java is a reference variable which is used to refer immediate parent class object. Whenever you create
Covariant Return Type
The covariant return type specifies that the return type may vary in the same direction as the subclass. Before
Method Overriding in Java
If subclass (child class) has the same method as declared in the parent class, it is known as method overriding
Method Overloading in Java
If a class has multiple methods having same name but different in parameters, it is known as Method Overloading. If
Aggregation in Java
If a class have an entity reference, it is known as Aggregation. Aggregation represents HAS-A relationship. Consider a situation,
Inheritance in Java
Inheritance in Java is a mechanism in which one object acquires all the properties and behaviors of a parent object.
this keyword in java
There can be a lot of usage of java this keyword. In java, this is a reference variable that refers to the
Java static keyword
The static keyword in Java is used for memory management mainly. We can apply java static keyword with variables, methods, blocks
Constructors in Java
In Java, a constructor is a block of codes similar to the method. It is called when an instance