130513

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package point4dtest;

/**
 *
 * @author User
 */
class Circle {
    final double pi;
    double area_result;
    int x, y, r;

    /*Circle() {
        this(0, 0, 0);
    }*/
    Circle(int x, int y, int r,double pi) {
        //this 하면 위의 r을 사용 (맴버변수)
        this.r = r;
        this.x = x;
        this.y = y;
        this.pi=3.14;//this.pi=pi로 하면 인자로 쓰게되고, 3.14로 잡아주면 인자 뭐로오던 간에 3.14로 박힘
    }
    double area()
    { 
        r=3;
        area_result=r*r*pi;
        return area_result;
    }
    //생성자에서 초기화 하는 방법

}

class CircleC {

    Point center = new Point();
    int r;
    CircleC()
    {
        this(0,0,0);
    }
    CircleC(int x,int y, int z)
    {
        center.x=x;
        center.y=y;
        this.r=r;
    }
}

class CircleI extends Point {

    int r;
    CircleI() {
        this(0, 0, 0);
    }
    CircleI(int x, int y, int r) {
        this.r = r;
        this.x = x;
        this.y = y;
    }
}

class Point {

    int x, y;

    Point(int x, int y) {
        this.x = x;
        this.y = y;
    }

    Point() {
        this(0, 0);
    }
    /*
    String getLocation() {
        return "x :" + x + ", y :" + y;
    }
    */
}

class Point3D extends Point {

    int z;

    Point3D(int x, int y, int z) {
        super(x,y);
        //this.x = x;
        //this.y = y;
        this.z = z;
    }

    Point3D() {
        this(0, 0, 0);

    }
    String getLocation()
     {
     return "x :" + x + ", y :"+ y+"z :"+z;
     }
}

class Point4D extends Point3D {

    int t;

    Point4D(int x, int y, int z, int t) {
        super(x,y,z);
        /*this.x = x;
        this.y = y;
        this.z = z;
        */
        this.t = t;
    }

    Point4D() {
        this(0, 0, 0, 0);
    }

    String getLocation() {
        return super.getLocation() + " t : " + t;
    }
}

public class Point4DTest {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Point p = new Point(0, 0);
        Point p2 = new Point();
        Point3D p3 = new Point3D(1, 2, 3);
        Point4D p4 = new Point4D(1, 2, 3, 4);
        CircleC c2 = new CircleC();
        Circle cc = new Circle(1,2,3,4);
        Point4D  p4d = new Point4D();
        System.out.println("p.x : " + p.x + " p.y :" + p.y + " p2.x : " + p2.x + " p2.y : " + p2.y + " p3.z : " + p3.z + " p4.x : " + p4.x + " p4.y : " + p4.y + " p4.z : " + p4.z + " p4.t : " + p4.t + " c2.center.x : "
                +c2.center.x);
        System.out.println(p4d.getLocation());
        System.out.println("circle area : "+cc.area());
    }
}