. Write a toString method for this class. The method should return a string containing the base, height and area of the triangle. b. Write an equals method for this class. The method should accept a Triangle object as an argument. It should return true if the argument object contains the same data as the calling object, or false otherwise. c. Write a greaterThan method for this class. The method should accept a Triangle object as an argument. It should return true if the argument object has an area that is greater than the area of the calling object, or false otherwise.

Check the explanation

Explanation:

Circle.java

public class Circle {

private double radius;

public Circle(double r) {

radius = r;

}

public double getArea() {

return Math.PI * radius * radius;

}

public double getRadius() {

return radius;

}

public String toString() {

String str;

str = "Radius: " + radius + "Area: " + getArea();

return str;

}

public boolean equals(Circle c) {

boolean status;

if (c.getRadius() == radius)

status = true;

else

status = false;

return status;

}

public boolean greaterThan(Circle c) {

boolean status;

if (c.getArea() > getArea())

status = true;

else

status = false;

return status;

}

}

I have created a class also to test this class below is the class: -

MainCircle.java

public class MainCircle {

public static void main(String args[]) {

Circle c = new Circle(2.5);

Circle c1 = new Circle(2.5);

Circle c2 = new Circle(4.5);

System.out.println(c);

System.out.println(c1);

System.out.println(c2);

System.out.println("Is c and c1 equal : "+c.equals(c1));

System.out.println("Is c2 greater than c1 : "+c1.greaterThan(c2));

}

}

Output: -

Radius: 2.5Area: 19.634954084936208

Radius: 2.5Area: 19.634954084936208

Radius: 4.5Area: 63.61725123519331

Is c and c1 equal : true

Is c2 greater than c1 : true

(because i need 20 chars)