1  public class TestTV {  
  2    public static void main(String[] args) {
  3      TV tv1 = new TV(); // Create a TV
  4      tv1.turnOn(); // Turn on tv1
  5      tv1.setChannel(30);
  6      tv1.setVolume(3);
  7      
  8      TV tv2 = new TV();
  9      tv2.turnOn();
 10      tv2.channelUp();
 11      tv2.channelUp();
 12      tv2.volumeUp(); // Increase tv2 volume up 1 level
 13      
 14      System.out.println("tv1's channel is " + tv1.channel 
 15        + " and volume level is " + tv1.volumeLevel);
 16      System.out.println("tv2's channel is " + tv2.channel 
 17        + " and volume level is " + tv2.volumeLevel);
 18    }
 19  }