JAVA | 상속예제2 원 반지름, 삼각형

package kr.or.kihd.inheritance2;

//조상 부모 클래스
public class Shape {
	String color ="black";
	
	public void draw() {
		System.out.println("draw()");
	}

}

 

package kr.or.kihd.inheritance2;

//독립된 클래스
public class Point {
	int x;
	int y;
	
	//기본 생성자
	public Point() {
		this(0,0);
	}
	
	//매개변수가 있는 생성자
	public Point(int x, int y) {
		System.out.println("Point 클래스의 매개변수가 있는 생성자 호출");
		this.x = x;
		this.y = y;
	}
}

 

package kr.or.kihd.inheritance2;

public class Circle extends Shape{
	
	Point center;         //원점
	int radius;			  //반지름
	
	public Circle() {
		this(new Point(0,0),100);
	}

	public Circle(Point center, int radius) {
		System.out.println("Circle클래스의 멤버변수가 있는 생성자 호출");
		this.center = center;
		this.radius = radius;
	}
	
	@Override
	public void draw() {
		System.out.println("색깔 : " +this.color);
		System.out.println("원점 : (x : " + this.center.x +
							", y : " + this.center.y+
							", 반지름 : " + this.radius + ")");		
	}
}

 

package kr.or.kihd.inheritance2;

public class ShapeTest {
	
	public static void main(String[] args) {
		Circle circle = new Circle();
		circle.draw();
		System.out.println();
		
		Circle circle2 = new Circle(new Point(150, 150), 500);
		circle2.draw();
		System.out.println();
		
		Triangle triangle = new Triangle();
		triangle.draw();
		System.out.println();
		
		
		
		Point[] point = new Point[] {new Point(10,10),
								 	 new Point(10,10),
									 new Point(10,10),};
		Triangle triangle2 = new Triangle(point);
		triangle2.draw();
	}

}

 

package kr.or.kihd.inheritance2;

public class Triangle extends Shape{
	
	Point[] point;
	
	public Triangle() {
		this(new Point(0,0),new Point(50,50),new Point(100,100));
	}

	public Triangle(Point point1, Point point2 , Point point3) {
		System.out.println("Triangle의 매개변수 3개 호출됨");
		this.point = new Point[] {point1, point2, point3};	
	}
	
	public Triangle(Point[] point) {
		System.out.println("Triangle의 매개변수 point 호출됨");
		this.point = point;
	}
	
	@Override
	public void draw() {
		System.out.println("[point1] : " + this.point[0].x + 
							", "+ this.point[0].y);
		System.out.println("[point2] : " + this.point[1].x + 
							", "+ this.point[1].y);
		System.out.println("[point3] : " + this.point[2].x + 
							", "+ this.point[2].y);
	}

}