Missing Method body, or declare abstract

Question

I am getting this error message:

Exception in thread \"main\" java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: Pet.saySomething

Answer 1

You have the following options for Speak, take your pick:

1st

public abstract class Speak{

   public abstract void saySomething();

}

2nd

public class Speak{

   public void saySomething(){

   }
}

3rd

public interface Speak{

   public void saySomething();
}

Edit: First of all, you are not using Speak class anywhere. Second, please add the following method in Pet class:

 public abstract void saySomething();

Answer 2

If Speak is a concrete class, it must implement all of its methods, so saySomething must have a body.

However, it looks like Speak is more suitable to be an interface. Your Pet class can implement that interface.