Computer scienceProgramming languagesJavaCode organizationObject-oriented programmingClass hierarchiesInterfaces and abstract classes

Declaring functionality with interfaces

Theory

Area of a circle

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The Circle class represents a circle. Implement the Measurable interface and add a single method area that returns the area of a circle.

Note: Java has a built-in constant for PI: Math.PI

The class will be tested by creating an instance of Circle and invoking its area method:

Measurable circle = new Circle(1);
double area = circle.area(); // 3.14...
Write a program in Java 17
class Circle {
private double radius;

public Circle(double radius) {
this.radius = radius;
}
}

// do not change the interface
interface Measurable {
double area();
}
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