OOP in java

Encapsulation
Class in java

• Field Values or Properties
• Methods
• Types of methods
• Pass by value or reference

Object creation and destruction
Access Control in java
Nested classes
Inheritance in java

• Inheritance : cpp vs java
• Using super in java
• Multilevel inheritance : Calling order of Constructors
• Abstract classes
• Interfaces in java
• Multiple inheritance in java
• Inheritance among interfaces in java
• Multiple inheritance in java
• Abstract classes : cpp vs java
• Abstract classes vs Interfaces
• Abstract-Interface or skeletal implementations
• Various interfaces
• Abstract-Interface or skeletal implementations 
• Constant Interfaces 
• Marker Interfaces
• Final in java: Preventing inheritance

Polymorphism in java

• Array of base class objects
• Casting and instanceof