JAVA에서 상속을 이용한 예제

*** 검색어: nabiro, JAVA, 상속

[출처] 열혈강의 JAVA Programming / 프리렉(주) / 김승현 저 / 

/**
 * 상속을 이용한 예제
 */

import java.io.*;

class MyPoint {
	private int x;
	private int y;	
	protected static BufferedReader in;
	static {
		in = new BufferedReader(new InputStreamReader(System.in));
	}
	
	protected MyPoint() throws IOException{
		System.out.print("x = ");
		this.x = Integer.parseInt(in.readLine());
		System.out.print("Y = ");
		this.y = Integer.parseInt(in.readLine());
	}
	
	protected void disp(){
		System.out.println();
		System.out.println("점(x, y) = (" + this.x + "," + this.y + ")");
	}
}

class Circle extends MyPoint{
	private int r;
	public Circle() throws IOException{
		super(); 	// MyPoint() 호출, 생략 가능
		System.out.print("r = ");
		this.r = Integer.parseInt(in.readLine());
	}
	
	public void disp(){
		super.disp();
		System.out.println("반지름 r = " + this.r);
	}
}

class Rect extends MyPoint{
	private int w;
	private int h;
	public Rect() throws IOException{
		super();	// MyPoint() 호출, 생략 가능
		System.out.print("w = ");
		this.w = Integer.parseInt(in.readLine());
		System.out.print("h = ");
		this.h = Integer.parseInt(in.readLine());
	}
	public void disp(){
		super.disp();
		System.out.println("폭 = " + this.w + ", 높이 " + this.h);
	}
}

public class Round13_Ex07 {
	public static void main(String[] ar) throws IOException{
		Circle cc = new Circle();
		cc.disp();
		System.out.println();
		System.out.println();
		Rect rt = new Rect();
		rt.disp();
	}
}