Question-1 Calculate Area of triangle.
Answer:-
Answer:-
abstract class GameConsole {
int score;
void displayScore () {
System.out.println("The displayScore method.");
}
abstract void computeScore();
abstract void playGame();
}
class Badminton extends GameConsole {
void playGame() {
System.out.println("Starting the Badmintion Game...");
}
void computeScore() {
System.out.println("Calculating Score for the Badmintion Game...");
}
}
class TableTennis extends GameConsole {
void playGame() {
System.out.println("Starting the TableTennis Game...);
}
void computeScore() {
System.out.println("Calculating Score for the TableTennis Game...");
}
}
public class GameDemo {
public static void main(String args[]) {
Badminton obj1 = new Badminton ();
obj1.playGame();
obj1.computeScore();
obj1.displayScore();
TableTennis obj2 = new TableTennis();
obj2.playGame();
obj2.computeScore();
obj2.displayScore();
}
}
Question-2 Compass Direction.
Answer:-
public class OuterClass {
public int x = 42;
public void method1() {
class LocalClass {
public void localPrint() {
System.out.println("In local class");
System.out.println(x);
}
}
LocalClass lc = new LocalClass();
lc.localPrint();
}
public void method2() {
Runnable r = new Runnable() {
@Override
public void run() {
System.out.println("In an anonymous local class method");
System.out.println(x);
}
};
r.run();
}
public Runnable r = new Runnable() {
@Override
public void run() {
System.out.println("In an anonymous class method");
System.out.println(x);
}
};
Question-3 Query on furniture Items.
Answer:-
public adstract class Furniture {
protected String color;
protected int width;
protected int height;
public adstract void accept();
public adstract void display();
}
class chair extends Furniture {
private int numOf_legs;
public void accept() {
colour = "Brown"
width = 36;
height = 48;
numOf_legs = 4;
}
public void display() {
System.out.println("DISPLAYING VALUE FOR CHAIR");
system.out.println
("==================================");
System.out.println("Color is" + color);
System.out.println("Width is" + width);
System.out.println("Height is" + height);
System.out.println("Number of legs is" + numOf_legs);
System.out.println(" ");
}
}
class Bookshelf extends Furniture {
private int numOf_shelves;
public void accept() {
colour ="Black";
width = 72;
height = 84;
numOf_shelves = 4;
}
public void display () {
System.out.println("DISPLAYING VALUES FOR BOOKSHELF")
System.out.println
("===================================");
System.out.println("Color is" + color);
System.out.println("Width is" + width);
System.out.println("Height is" + height);
System.out.println("Number of shelves is" + numOf_shelves);
System.out.println(" ");
}
}
class FurnitureDemo {
public static void main(String[] args) {
bookShelf b1 = new BookShelf();
b1.accept();
b1.display();
Chair c1 = new Chair ();
c1.accept();
c1.display();
}
Question-4 Query on Game Console.
Answer:-
abstract class Area {
double dim1, dim2, result;
abstract void calArea();
double disArea() {
return result;
}
}
class Circle extends Area {
double pie = 3.14;
public Circle(double rad) {
dim1 = rad;
}
void calArea() {
result= pie*dim1*dim1;
}
}
class Rectangle extends Area {
public Rectangle(double ln, double br) {
dim1 = ln;
dim2 = br;
}
void calArea() {
result = dim1 * dim2;
}
}
claSS Square extand Area {
public Square(double side) {
dim1 = side;
}
void calArea() {
result =dim1* dim1;
}
}
class Triangle extends Area {
public Triangle (double bas, double high) {
dim1 = bas;
dim2 = high;
}
void calArea() {
result = (dim1 * dim2 ) /2;
}
}
public class Area calculator {
public static void main (String[] args) {
Square sobj = new Square (44.5);
sobj.calArea();
System.out.println("The area of square is " + sobj.disArea());
Rectangle robj = new Rectangle (23.4, 12);
robj.calArea();
System.out.println("The area of rectangle is " + robj.disArea());
Circle cobj = new Circle (5.7);
cobj.calArea();
System.out.println("The area of circle is " + cobj.disArea());
Triangle tobj = new Triangle (20, 20);
tobj.calArea();
System.out.println("The area of triangle is " + tobj.disArea());
}
Question-5 Create a Nested Class.
.Write a program to calculate the area of triangle, circle, square, and rectangle. However, you need to ensure that the preceding set of functionalities must be achieved by implementing abstraction.
Answer:-
