super(day20)

package day21.ex02_super;

public class Student extends People{

	public int studentNo;
	
	// 아래는 자식 클래스의 명시적 생성자임
	public Student(String name, String ssn, int StudentNo) {
		super(name, ssn);
		this.studentNo = StudentNo;
		
	}
	
	
}

package day21.ex02_super;

public class Student_Ex {

	public static void main(String[] args) {
		Student std = new Student("홍길동", "123456-1234567", 1);
		System.out.println("name : " + std.name);
		System.out.println("ssn : " + std.ssn);
		System.out.println("studentNo : " + std.studentNo);
		
	}
}

package day21.ex02_super;

public class Tv extends Product{
	
	
	Tv(){}

	public String toString() {
		return "Tv";
	}
}

package day21.ex02_super;

public class Tv_Ex {
	public static void main(String[] args) {
		Tv t = new Tv();
		
		System.out.println(t.toString());
	}
}

package day21.ex02_super;

public class Car {
	String name;
	int wheel;
	
}

package day21.ex02_super;

public class SportsCar extends Car{
	String color;
	
	void CarSet(String name, int wheel) {
		this.name = name;
		this.wheel = wheel;
	}
}

package day21.ex02_super;

public class SportsCar_Ex {

	public static void main(String[] args) {

		SportsCar c1 = new SportsCar();
//		c1.name = "그랜저";	// 부모
//		c1.wheel = 4;		// 부모
		c1.CarSet("그랜저", 4); //부모
		
		c1.color = "검정색";	// 자식
		
		System.out.println("부모 : " + c1.name);
		System.out.println("부모 : " + c1.wheel);
		
		System.out.println("자식 : " + c1.color);
	}
}

package day21.ex03;

public class Car {

	String color;
	int speed;



	void upSpeed(int value) {
		speed = speed + value;
	}
	
	void downSpeed(int value) {
		speed = speed + value;
	}
	
}

package day21.ex03;

public class Car_Ex {
	public static void main(String[] args) {
		
	Sedan se = new Sedan();
	Truck tr = new Truck();
	se.upSpeed(300);
	tr.upSpeed(100);
	se.seatNum= 5;
	tr.capacity = 50;
	int i = tr.getCapacity();
	System.out.println("승용차 속도는" + se.speed + "km, 좌석수는 " + se.getseatNum() + "개 입니다.");
	System.out.println("트럭 속도는 " + tr.speed + "km, 적재량은" + tr.getCapacity() + "톤입니다.");
	
	}
}

package day21.ex03;

public class Truck extends Car{

	

	int capacity;
//	void
//	매개타입 메소드이름(매개변수(지역변수)) {
//		capacity = 매개변수	
//}
	int getCapacity() {
		System.out.println("안녕하세요");
		
		return capacity;
	}
}

package day21.ex03;

public class Sedan extends Car{
	
	int seatNum;
	
	int getseatNum() {
		return seatNum;
	}
	
}