Question
In what follows, you have a code with two errors. Find the errors, specify the type of the error (syntax or compile time error) and
In what follows, you have a code with two errors. Find the errors, specify the type of the error (syntax or compile time error) and explain them. Put your answer in the provided box.
public class DynamicBindingDemo{ public static void main(String[] args){ m(new MetroTicket()); m(new Ticket()); m(new TrainTicket()); }
public static void m(TrainTicket x){ System.out.println(x.toString()); } }
public class MetroTicket extends TrainTicket{ }
public class TrainTicket extends Ticket{ public String toString(){ return "A Train Ticket"; } }
public class Ticket implements Comparable{ public String toString(){ return "A Ticket"; } }
public interface Comparable{ public abstract int compareTo(Object o); } |
// Explain error 1 here
|
// Explain error 2 here
|
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