what are the oops concept in java explain with real time
examples
Answer Posted / ajay kumar agarwal
OOPS Concepts are mainly 4
1.Abstraction
2.Encapsulation
3.Inheritance
4.Polymorphisam
Abstraction:-Hidding non-essential features and showing the
essential features
(or)
Hidding unnecessary data from the users details,is called
abstraction.
Real Time example:Any electronic Device
in that we don't see the
button circuits.i.e buttons circutes and wirings all are
hidden.so i think its good example.
Encapsulation:
Writing Operations and methods stored in a single
class.This is Called Encapsulation
Real Time Example:A state Or Country
i.e different culture districts make a state.and different
behaviours of states form a country..
I think it is good example
Inheritance:
The New Class is Existing from Old Class,i.e SubClass is
Existing from Super Class.
Real Time Example:
Father and Son Relationship is the Ever green example
Polymorphisam:
Sinle Form behaving diffreantly in diffreant
Situations.
Example:-
Camera Mobile
when we talk used as communicator,
When we go for a tour used as a camera.
When we want to enjoy used as a player or FM.
I think these all are real time experianceany.is there any
more answers send me my mail Madhu.jjj@rediffmail.com also.
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What is the difference between abstraction and encapsulation?
Draw a UML class diagram for the code fragment given below: public class StringApplet extends Applet { private Label sampleString; private Button showTheString; private ButtonHandler bHandler; private FlowLayout layout; public StringApplet() { sampleString = new Label(" "); showTheString = new Button (" Show the String"); bHandler = new ButtonHandler(); layout = new FlowLayout(); showTheString.addActionListener(bHandler); setLayout(layout); add(sampleString); add(showTheString); } class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { samplestring.setText("Good Morning"); } } } Note: The methods need not be indicated on the diagram.
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