package Wednesday;
public abstract class TV {
	private static final int DIAGONAL_LENGTH = 10;
	private static final String BRAND = "cmsc131";
	private int diagonalLength; 
	private String brand;
	private int channelNum;
	
	/* Relying on the general constructor to implement the */
	/* the following two constructors. */
	public TV() {
		this(DIAGONAL_LENGTH, BRAND);
	}
	
	public TV(String brand) {
		this(DIAGONAL_LENGTH, brand);
	}
	
	/* Most general Constructor */
	public TV(int diagonalLength, String brand) { 
		this.diagonalLength = diagonalLength;
		this.brand = brand;
		channelNum = 1;
	}
	
	public String getBrand() {
		return brand;
	}

	public void setBrand(String brand) {
		this.brand = brand;
	}
	
	public int getDiagonalLength() {
		return diagonalLength;
	}
	
	public void setDiagonalLength(int diagonalLength) {
		this.diagonalLength = diagonalLength;
	}
	
	public String toString() {
		return "Brand: " + brand + ", Diagonal Length: " + diagonalLength;
	}
	
	/* Notice this method calls an abstract method */
	/* to be implemented by a subclass. */
	public void changeChannel(int channelNum) {
		this.channelNum = channelNum;
		processAndDisplaySignal();
	}

	public int changeChannel(double channelNum) {
		return 1;
	}
	/* Can we defined the access specifier to be private? */
	protected abstract void processAndDisplaySignal();
	
	public static void main(String[] args) {
		/* Are the two following statements allowed? */
		/*TV tvSet1 = new TV();
		System.out.println(tvSet1);*/
	}
}