Java programs to implement OOP concepts. (PPT URL:https://drive.google.com/file/d/1qxulaLY0QrKlrtAX8YaK-2JpMdHYkao-/view?usp=drivesdk )

1.Program to add two numbers and display the result using an object. [Class and Object]

2.Program to set a value and retrieve that value using methods. [Encapsulation]

3.Program to implement the following hierarchy. [Inheritance]

          A
        /   \
       B     C
      /
     D
  
        Instance Variable     Instance Method
 A =>       a                   printValue(), messageA()
 B =>       b                   printValue()
 C =>       c                   printValue()
 D =>       d                   printValue()

4.Create two classes: Parent and Child. [Polymorphism]

Overload ping() in Child.

Override display().

Also implement upcasting during instantiation.

5.Program to implement the following hierarchy. [Abstraction]

        Smartphone(abstract class)                  Smartphone(abstract class)         Phone(interface)
         [ Abstract: os() , camera() ]              [ Abstract: os() , camera() ]      [ call() ,message() ]
         [ Concrete: display() ]                    [ Concrete: display() ]                   /      
                |                                           \                               /                      
                |                                             \                           /                        
                |                                               \                       /
                |                                                 \                   /         
             Samsung                                                \               /
                                                                      \           /
                                                                        \       /                               
                                                                          Apple