Ans1
{ public class Dog
;String name
;String color
creating a default constructor//
{ )(public Dog
;System.out.print("I am the costructor")
}
{ )(void barking
}
{ )(void hungry
}
{ )(void sleeping
}
{ public static void main(String[] args)
Declaring an object of Dog class using the default constructor //
;)(Dog dog = new Dog
}
}
Ans2
Ans3
import java.util.Scanner;
class Rectangle {
;double width,height
Parameterized constructor //
{Rectangle(double width, double height)
;this.width=width
;this.height=height
Printing the area of the rectangle //
;))nThe area of the rectangle is : "+(this.width*this.height\System.out.print("
}
}
Test driver class //
public class TestRectangle {
{ public static void main(String[] args)
;Scanner input = new Scanner(System.in)
Getting input from the user //
;)" :System.out.print("Enter the height of the rectangle
;)(double height = input.nextDouble
;System.out.print("Enter the width of the rectangle: ")
;)(double width = input.nextDouble
Declaring an object of Rectangle class using parameterized constructor //
;Rectangle rect = new Rectangle(height,width)
}
}