Thread: exam revision question help please

Consider the following program fragment that defines a self‐referential class:

public class DrinkOrders
{
public String drinkDescription;
public DrinkOrders next;
public DrinkOrders(String d)
{
drinkDescription=d;
next=null;
}
public addDrink(String d)
{
DrinkOrders o,c;
o=new DrinkOrders(d);
c=this;
while (c != null)
{
c=c.next;
}
c.next=o;
}
…
public String toString()
{
return drinkDescription + toString();
}
}
public class Harness
{
public static void main(String []args)
{
DrinkOrders myRound;
 
myRound=new DrinkOrders("Beer");
System.out.println(myRound.toString());
/* ### */
myRound.addDrink("Wine");
System.out.println(myRound.toString());
}
}

a. What will be displayed on the screen if the above program is compiled and run?
Why?

b. Assume that any compiler/logic errors that arose in part (a) above are corrected
and, on execution, the annotated line (###) is reached without error. What
would the output of the final println() method call be? Why?

 
public class DrinkOrders
{
	public String drinkDescription;
	public DrinkOrders next;
	public DrinkOrders(String d)
	{
		drinkDescription=d;
		next=null;
	}
	public addDrink(String d)
	{
		DrinkOrders o,c;
		o=new DrinkOrders(d);
		c=this;
		while (c != null)
		{
			c=c.next;
		}
		c.next=o;
	}
…
	public String toString()
	{
		return drinkDescription + toString();
	}
}
 
public class Harness
{
	public static void main(String []args)
	{
		DrinkOrders myRound;
 
		myRound=new DrinkOrders("Beer");
		System.out.println(myRound.toString());
		/* ### */
		myRound.addDrink("Wine");
		System.out.println(myRound.toString());
	}
}

I tried to compile but cannot thanks

error: invalid method declaration; return type required
error: illegal character: \8230

--- Update ---

line 10, line 21

Which lines are line 10 and 21?

Check on line 10: is your method declared correctly? Does it state on its declaration line that it will return anything?
Check on line 21: do you have some characters in your file that simply don't belong there?