public class Television
{
   private static final String MANUFACTURER = "Sony"; 
	private static final int SIZE = 56;
	private  int channel;
	private int  volume;
	private  boolean powerOn;
	
	Television ()
	{
	   	powerOn = false;
   }
	
	public  void power (boolean isOn)
	{
	   if (powerOn)
		   powerOn = false;
		else
		   powerOn = true;
	}
	
	public void setChannel (int number)
	{
	    this.channel = number;
	}
	public  int getChannel ()
	{
	  return this.channel;
	}
	public  void setVolumeLevel (int number)
	{
	    this.volume = number;
	}
   public  int getVolumeLevel ()
	{
	 return this.volume;
	}
	public static int getScreenSize()
	{
	  return SIZE;
	}
	public static String getManufacturer ()
	{
	  return MANUFACTURER;
	}	
}