Interface

Interface

1.Create an interface names ShapeInterface that has two methods and one constant and an abstract class named ShapeAbstract that has two instance variable, one abstract and one non-abstract method. Create a concrete class a.Rectangle that uses the interface b.Circle that uses the interface and abstract class

View Answers

March 8, 2011 at 12:35 PM

interface ShapeInterface{
    int l=0,b=0;
    public void area();
    public void perimeter();
}
abstract class ShapeAbstract  {
    double PI=3.14,r=0;
    public void areaOfCircle() {
    }
abstract public void circumference();
}
 class Rectangle implements ShapeInterface{
int l=10,b=5;
public void area(){
    int ar=l*b;
    System.out.println("Area of Rectangle: "+ar);
}

public void perimeter(){
    int k=l+b;
    int p=2*k;
    System.out.println("Perimeter of Rectangle: "+p);
}
}
 class Circle extends ShapeAbstract implements ShapeInterface {
    int r=5;
    int l=15,b=10;
    public void areaOfCircle() {
    double area=PI*r*r;
    System.out.println("Area of Circle: "+area);
    }
    public void circumference(){
    double cir=2*PI*r;
    System.out.println("Circumference of Circle: "+cir);
    }

    public void area(){
    int ar=l*b;
    System.out.println("Area of Rectangle: "+ar);
}
public void perimeter(){
    int k=l+b;
    int p=2*k;
    System.out.println("Perimeter of Rectangle: "+p);
}
}
class InterfaceAndAbstractClass{
    public static void main(String[]args){
    Rectangle a=new Rectangle();
    a.area();
    a.perimeter();
    System.out.println();
    Circle b=new Circle();
    b.areaOfCircle();
    b.circumference();
    b.area();
    b.perimeter();
    }
}









Related Tutorials/Questions & Answers:
interface
interface   what is the use of marking interface
interface.
interface.  Write short note on interface.   Please visit the following link: Java Interface
Advertisements
interface
interface  will the interface implements a interface   Hi Friend, No. Interface can extends another interface but cannot implements it, because interface will not contain the implementation. Thanks
INTERFACE
INTERFACE  how interface support multiple inheritance in java
interface
interface   Hi I have interface in that interface 3 methods are there , after some days client said that,i want to add one more method in that interface ,so how can add 4 method so that the implemented class did not affect
interface
interface  can we extend interface?   Hi Friend, Yes an interface can be extended by other interface like using extends keyword interface A{ } interface B extends A{ } For Example: interface IntefaceA { void
interface
interface  what the use of interface?   An interface is one... variables.Any class can implement(inherit)the interface and make use... is achieved by using the interface (by implementing more than one interface at a time
interface
interface  develop a library interface which has drawbook(),returnbook()(with fine),checkstatus() and reservebook() methods.all the methods tagged with public
interface
interface  What is marker interface ?? what is its use in java programming?? is this us in programming ??Explain is implementation with code
interface
interface  develop a library interface which has drawbook(),returnbook()(with fine),checkstatus() and reservebook() methods.all the methods tagged with public
Interface
for Interface in java? and want to know why they used interface instead of multiple inheritance? Thanks in advance   An interface is one which has abstract... implement(inherit)the interface and make use of the methods(functions
interface
interface  why do we need interface in java..if it`s usefull for to obtain multiple inheritance in the sense how it gonna be achieved...and i can...)...the y we need interface...THis is question often i heard from my developer
Interface
Interface  I need to implement the interface without overriding its method and also don't use abstract class for this. How to do
interface
interface  What is the exact use of interface in real time scenario? some people says that interface provides multiple inheritance. Is it true...; Through interface, we can achieve the multiple inheritance. Java does
Interface
Interface  1.Create an interface names ShapeInterface that has two... class a.Rectangle that uses the interface b.Circle that uses the interface and abstract class   interface ShapeInterface{ int l=0,b=0; public
Interface
Interface  1.Create an interface names ShapeInterface that has two... class a.Rectangle that uses the interface b.Circle that uses the interface and abstract class   interface ShapeInterface{ int l=0,b=0; public
Interface
Interface  Declare an Interface called property containting a method compute price to compute &return the price.The inerface is to be implemented by follwaing two class (1)Bungalow&(2)Flat both the lasses have following
What is an interface?
What is an interface?  What is an interface
Can an Interface implement another Interface?
Can an Interface implement another Interface?   Hi, Can an Interface implement another Interface? Thanks
Can an Interface extend another Interface?
Can an Interface extend another Interface?   Hi, Can an Interface extend another Interface? thanks
ServletRequest interface
ServletRequest interface   What is new in ServletRequest interface
Map interface
Map interface  What is the Map interface
Java interface
Java interface  What is the List interface
List interface
List interface  What is the List interface
Interface implimentation
Interface implimentation  How to impliment an interface For Achieveing MVC & loosCupling in Any Project
callable interface
callable interface  When we use the callable interface instated of runable interface
Java Interface
Java Interface  Can an Interface have an inner class?  Yes, interface can have inner class. for example- public interface gyan { static...("in interface"); }; public static void main(String args
Java interface
Java interface  What must a class do to implement an interface?  It must provide all of the methods in the interface and identify the interface in its implements clause
Java interface
Java interface  What modifiers may be used with an interface declaration
logfile interface
logfile interface  How to create logfile interface for programs in java
Marker interface
Marker interface  what is a marker interface? what is its significance
Abstract and Interface
Abstract and Interface  what is the difference between Abstract and Interface accurateatly
null interface
null interface   what is the null interface and what is the use of it in real java project ?   Hi Friend, A null interface is an interface without any methods.Is also known as Marker interface. Null interfaces are used
marked interface
marked interface  how jvm work with marked interface?(that means how it will know its behaviour with out any methods)   Hi, Learn it at Market Interface in Java tutorial page.ADS_TO_REPLACE_1 Thanks
interface_querry
interface_querry  By using interface we have to implement all unimplemented methods into our class, even though we are not using all of methods, what is the alternative
Interface in java
Interface in java  An Interface method implemented in more than one different class with same method name. To avoid overriding of methods, we use ObjectReference for that class
Marker Interface
Marker Interface  What is the need of Marker Interface?When should we use
Abstract and Interface
Abstract and Interface  What is interface? When time is most suitable for using interface? Why we use interface instead of abstract? What is the differences between abstract and interface?   An interface defines a set
Markable Interface
Markable Interface  In Java can we create our own Markable Interface?? If yes then how, Please explain with example   Marker interface...) the state of an object then you have to implement the Serializable interface
Interface in javascript
Interface in javascript  Implement an interface in javascript, which takes in a collection of objects, and the column names on which we should build indexes ( say a simple BST) and defines the "where" query functionality
IResponder interface
IResponder interface  Hi..... I have a problem regarding what the IResponder interface consists of and how it is used? please tell me about that........ Thanks
collection interface
collection interface  methods of collection interface and their description with example program?   Please visit the following links: http://www.roseindia.net/java/jdk6/Collection-Interfaces.shtml http
collection interface
collection interface  methods of collection interface and their description with example program?   Please visit the following links: http://www.roseindia.net/java/jdk6/Collection-Interfaces.shtml http
Implementing Interface
Implementing Interface  interface Mat { void read( ); void display( ); } Create a class Matrix by implementing interface Mat. Derive class MatrixOp from Matrix and provide functions to add and multiply two matrices. Also derive
Set interface
Set interface  hello,, What is the Set interface?   hii,ADS_TO_REPLACE_1 The Set interface provides methods for accessing the elements..., Here is the example of Set Interface in Java.ADS_TO_REPLACE_2 import
web interface
web interface  hii sir, i want to develop a project name web GU interface for oracle like 10g can anyone help me plz how to develop using jsp and servelets provide code for WOI
Interface
interface
interface
java interface
java interface  Create a interface called student Define methods like get roll number Get name Get subject Create two classes Electronic student And history student Enter 5 students in the main class 2 of history and 3 elec

Ads