package Wednesday;
public class ValidInvalid {

	public static void main(String[] args) {
		/* The following three declarations are correct */
		TV tv1 = new ConventionalTV();
		TV tv2 = new HighDefTV();
		HighDefTV high1 = new HighDefTV();
		
		/* Which of the following statements are valid?  */
		/* Notice that some of these statements may not compile */
		
		/*
		HighDefTV high2 = new ConventionalTV();
		
		HighDefTV high3 = new TV();
		
		ConventionalTV conv1 =  new ConventionalTV();
		
		System.out.println(conv1.super.toString());
		
		HighDefTV high4 = (HighDefTV)tv2;
		
		ConventionalTV conv2 = (ConventionalTV)tv2;
	
		TV tv3 = new TV();
		
		TV tv4 = high1;
		
		tv4.getDigitalConverter();
		
		tv4.changeChannel(4);
		
		tv4.toString(50);
		
		tv4.processAndDisplaySignal();
		*/
	}
}