Circle.java

public class Circle {
    private int x;
    private int y;
    private double radius;
    private static double maxRadius = 0;

    public Circle(){
        this(0, 0, 0);
    }

    public Circle(int x, int y, double radius){
        setX(x);
        setY(y);
        setRadius(radius);
    }

    public int getX() {
        return x;
    }
    public void setX(int x) {
        this.x = x;
    }
    public int getY() {
        return y;
    }

    public void setY(int y) {
        this.y = y;
    }

    public double getRadius() {
        return radius;
    }

    public void setRadius(double radius) {
        this.radius = Math.max(radius, 0);
        if (maxRadius < this.radius){
            maxRadius = this.radius;
        }
    }
    public static double getMaxRadius() {
        return maxRadius;
    }
    public int getArea(){
        double area = Math.PI * Math.pow(radius, 2);
        return (int)area;
    }
}