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class-variable

package s21300_java00;

class Tv { //Tv의 속성(멤버변수) String color; //색깔 boolean power; //전원상태(on/off) int channel; //채널

//Tv의 기능(메서드)
void power() { power = !power; } 	//Tv on off 기능을 하는 메서드
void channelUp() { ++channel; }	 	//Tv 채널 높이는 기능
void channelDown() { --channel; }	//Tv 채널 낮추는 기능

}

public class S21300_06v1 {

public static void main(String[] args) {
	// TODO Auto-generated method stub
	Tv t;			//Tv인스턴스를 참조하기 위한 변수 t 선언
	t = new Tv();	//Tv인스턴스를 생성
	
	t.channel = 7;	//Tv인스턴스 멤버변수에 값 설정
	t.channelDown();//Tv인스턴스 메서드 호출
	System.out.println("a현재 채널은 " + t.channel + "입니다");
	
	t.channelUp();
	System.out.println("b현재 채널은 " + t.channel + "입니다");
}

}

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