Java ?? ???

abstract ???? Java?? ???? ???? ? ?????. ?? ???? ???? ???? ? ???? ???? ??????.

?? ???? ??? ?? ???? ???? ????. ??? ??? ?? ???? ??? ? ????. ?? ???? ???? ??? ?? ???? ?? ????? ???.

??:-

    abstract class Employee  
    {  
    abstract void work();  
    }   

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throw ?? ???? ?? ???? ??? ? ????.

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?? void moveTo(double deltaX, double deltaY);

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??????? ?????? ????. ? ??? ??? ?? ??? ? ? ????
?, ? ?? Child ???? ?????? ? ????.

??:https://www.javatpoint.com/abstract-keyword-in-java

package chennai.velachery;

public abstract class Parent {

    abstract void getJob();

    void studyWell()
    {
        System.out.println("Focus On Maths, Science"); 
    }
    static void display()
    {
        System.out.println("Hi");
    }
    public static void main(String[] args) {
        Parent.display();
//      Parent pp = new Parent(); 
//      pp.display();
//      pp.studyWell(); 
//      pp.getJob();

    }



}

package chennai.velachery;

public class Child extends Parent {


    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Child ch = new Child(); 
        ch.getJob();
        ch.studyWell();
        Child.display();
    }

    @Override //Annotation : Metadata
    //Data about data
    void getJob() {
        // TODO Auto-generated method stub

    }


}

? 2:

package chennai.velachery;

public abstract class Parent1 {

    public void watch_tv()
    {
        System.out.println("Watching TV");
    }
    public void chat_with_friends()
    {
        System.out.println("Chatting with neighbours");
    }
    public abstract void cook(); 

}

---

package chennai.velachery;

public class Child1 extends Parent1{

    public static void main(String[] args) {
//      Child1 ch = new Child1(); 
//      ch.cook();
//      ch.chat_with_friends(); 
//      ch.watch_tv();
//      ch.work();

        Child1 ch = new Child1(); 
        //Dynamic Binding 
        //Parent Class Reference points to Child class Memory
        Parent1 parent = new Child1();  

        parent.watch_tv();
        parent.chat_with_friends();
        parent.cook();
        //parent.work(); 
    }
    public void watch_tv()
    { //Runtime Polymorphism
        System.out.println("Watching OTT");
    }

    @Override
    public void cook() {
        // TODO Auto-generated method stub
        System.out.println("Cooking");

    }

    public void work()
    {
        System.out.println("Java Projects");
    }

}

Java ?????

Java? ?????? ???? ??????. ?? ??? ?? ???? ????.

Java? ?????? ???? ???? ?? ???????. Java ??????? ??? ??? ?? ?? ???? ?? ? ????. Java?? ??? ? ?? ??? ???? ? ?????.

?, ?????? ?? ???? ??? ?? ? ??? ?? ? ????. ??? ??? ?? ? ????.

Java ?????? IS-A ??? ?????.

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Java ?????? ???? ??? ??????

?????? ???? ??? ?? ? ?????. ??? ?? ????.

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?????? ????? ???? ???? ?????. ??? ???? ?????. ?????? ?? ???? ? ???? ???? ?? ??? ????? public, static ? final?? ?????. ?????? ???? ???? ?????? ??? ?? ???? ???? ???.

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?????? ? ??? ??? ?? ??? ?????
100% ???:

??:

    abstract class Employee  
    {  
    abstract void work();  
    }   

?:

package chennai.velachery;

public abstract class Parent {

    abstract void getJob();

    void studyWell()
    {
        System.out.println("Focus On Maths, Science"); 
    }
    static void display()
    {
        System.out.println("Hi");
    }
    public static void main(String[] args) {
        Parent.display();
//      Parent pp = new Parent(); 
//      pp.display();
//      pp.studyWell(); 
//      pp.getJob();

    }



}

??:https://www.javatpoint.com/interface-in-java

Java? ??? ?? ??:

Java??? extends ???? ???? ?? ???? ?? ??? ???? ????, Implements ???? ???? ?????? ??? ???? ?????.

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??? ??? ??? ???**

Java? "??" ???

Java??? ??? ???? ?? ?? ???? ?? ????? ?????? ???? ? ?? ???? ?????. ??? ????? ?? ???? ?? ???? ??? ?? ???? ???? ? ?????. Java??? ????? ?? ?? ??? ???? ????. ??? ???? ???? ??? ?? ??? ???? ??? ? ????.

package chennai.velachery;

public class Child extends Parent {


    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Child ch = new Child(); 
        ch.getJob();
        ch.studyWell();
        Child.display();
    }

    @Override //Annotation : Metadata
    //Data about data
    void getJob() {
        // TODO Auto-generated method stub

    }


}

Java?? "??" ???

Java??? Implements ???? ???? ?????? ?????. ?????? ??? ???? ???? ?? ???? ???? ??? ??? ??????. ????? ???? ?????? Implements ???? ???? ?? ????? ?????? "??"?? ?? ?? ???? ?????? ??? ???? ????? ????? ???. ??????? ??? ??? ???? ???? ? ?? ??? ??? ?????? ??? ? ????.

/

package chennai.velachery;

public abstract class Parent1 {

    public void watch_tv()
    {
        System.out.println("Watching TV");
    }
    public void chat_with_friends()
    {
        System.out.println("Chatting with neighbours");
    }
    public abstract void cook(); 

}

??:https://www.geeksforgeeks.org/extends-vs-implements-in-java/

?:

    abstract class Employee  
    {  
    abstract void work();  
    }   

---

package chennai.velachery;

public abstract class Parent {

    abstract void getJob();

    void studyWell()
    {
        System.out.println("Focus On Maths, Science"); 
    }
    static void display()
    {
        System.out.println("Hi");
    }
    public static void main(String[] args) {
        Parent.display();
//      Parent pp = new Parent(); 
//      pp.display();
//      pp.studyWell(); 
//      pp.getJob();

    }



}

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