[Java] 자동차 클래스 만들기, 자동차 객체 사용하기

package _03_tv;

public class T01_api_tv {
	String company = "LG";
	String model = "울트라 FULL HD";
	int inch = 65;
	int volume;		// 기본값 : 0
	int channel = 2;
	boolean power;  // 기본값 : false
	
	void power() {
		power = !power;
		if(power)
			System.out.println("tv를 켭니다");
		else
			System.out.println("tv를 끕니다");
	}	
	int channelUp() {
		channel++;
		return channel;
	}
	int channelDown() {
		channel--;
		return channel;
	}
	int volume(int volumeInput) {
		volume = volumeInput;
		return volume;
	}
}

package _03_tv;

public class T01_main_tv {

	public static void main(String[] args) {		
		T01_api_tv tv1 = new T01_api_tv();
		System.out.println("회사명 : " + tv1.company);
		System.out.println("모델명 : " + tv1.model);
		System.out.println(tv1.inch + "인치");

		tv1.power();
		
		//System.out.println("tv상태 : " + tv1.power);
		System.out.println("현재 채널 : " + tv1.channelUp());
		System.out.println("현재 채널 : " + tv1.channelUp());
		System.out.println("현재 채널 : " + tv1.channelDown());
		System.out.println("볼륨 : " + tv1.volume(12));
		tv1.power();
		// System.out.println("tv상태 : " + tv1.power);
	}

}