[자바 (JAVA)] 22. Circle 클래스

CircleTest

package ex04;

class Circle {
    public int radius;
    public String color;

    public double getArea() {
        return 3.14 * radius * radius;
    }
}

public class CircleTest01 {
    public static void main(String[] args) {
        Circle obj;
        obj = new Circle();
        obj.radius = 100;
        obj.color = "blue";
        double area = obj.getArea();
        System.out.println("원의 면적 =" + area);
    }
}