1. TV

package TV;

public class TV {
	private int size;
	
	public TV(int size) { this.size = size; }
	protected int getSize() { return size; }
}

package TV;

public class ColorTV extends TV{
		private int color;
		
		public ColorTV(int size, int color) {
			super(size);
			this.color = color;
		}
		
		protected int getColor() {
			return color;
		}
		
		public void printProperty() {
			System.out.println(getSize()+"인치 "+color+"컬러");
		}
}

import TV.ColorTV;


public class ex01 {
	public static void main(String[] args) {
		ColorTV myTV = new ColorTV(32, 1024);
		myTV.printProperty();
	}
}

package TV;

public class IPTV extends ColorTV{
	String ipAddr;
	
	public IPTV(String ipAddr, int size, int color) {
		super(size, color);
		this.ipAddr =ipAddr;
	}
	
	@Override
	public void printProperty() {
		System.out.println("나의 IPTV는 "+ipAddr+"주소의 "+getSize()+"인치 "+getColor()+"컬러");
	}
}

import TV.IPTV;


public class ex02 {
	public static void main(String[] args) {
		IPTV iptv = new IPTV("192.1.1.2", 32, 2048);
		iptv.printProperty();
	}
}

2. Converter

package Converter;

import java.util.Scanner;

abstract public class Converter {
	abstract protected double convert(double src);
	abstract protected String getSrcString();
	abstract protected String getDestString();
	protected double ratio;
	
	public void run() {
		Scanner scanner = new Scanner(System.in);
		System.out.println(getSrcString()+"을"+getDestString()+"로 바꿉니다");
		System.out.print(getSrcString()+"을 입력하세요 >> ");
		double val = scanner.nextDouble();
		double res = convert(val);
		System.out.println("변환 결과 : "+res+getDestString()+"입니다");
		scanner.close();
	}
}

package Converter;

public class Won2Dollar extends Converter{
	private int dollar;
	
	public Won2Dollar(int dollar) {
		this.dollar = dollar;
	}

	@Override
	protected double convert(double src) {
		return src/dollar;
	}

	@Override
	protected String getSrcString() {
		return "원";
	}

	@Override
	protected String getDestString() {
		return "달러";
	}
	
	
}

import Converter.Won2Dollar;


public class ex03 {
	public static void main(String[] args) {
		Won2Dollar toDollar = new Won2Dollar(1200);
		toDollar.run();
	}
}

package Converter;

public class Km2Mile extends Converter{
	private double mile;
	public Km2Mile(double mile) {
		this.mile = mile;
	}

	@Override
	protected double convert(double src) {
		return src/mile;
	}

	@Override
	protected String getSrcString() {
		return "Km";
	}

	@Override
	protected String getDestString() {
		return "mile";
	}

}

import Converter.Km2Mile;


public class ex04 {
	public static void main(String[] args) {
		Km2Mile toMile = new Km2Mile(1.6);
		toMile.run();
	}
}

3. Point

package Point;

public class Point {
	private int x, y;
	public Point(int x, int y) {this.x = x; this.y=y;}
	public int getX() {return x;}
	public int getY() {return y;}
	protected void move(int x, int y) {this.x =x; this.y = y;}
}

package Point;

public class ColorPoint extends Point{
	private String color;
	
	public ColorPoint() {
		super(0,0);
		this.color = "BLACK";
	}
	public ColorPoint(int x, int y) {
		super(x,y);
		this.color = "BLACK";
	}
	public ColorPoint(int x, int y, String color) {
		super(x, y);
		this.color = color;
	}
	
	public void setXY(int x, int y) {
		move(x, y);
	}
	
	public void setColor(String color) {
		this.color = color;
	}
	
	@Override
	public String toString() {
		return color+"색의 ("+getX()+","+getY()+")의 점";
	}
}

import Point.ColorPoint;


public class ex05 {
	public static void main(String[] args) {
		ColorPoint cp = new ColorPoint(5, 5, "YELLOW");
		cp.setXY(10, 20);
		cp.setColor("RED");
		String str = cp.toString();
		System.out.println(str+"입니다");
	}
}

4. Stack