错误消息无法正确显示

Question

I'm trying to make dialog that will display an error message whenever I make wrong move in my scrabble game. So in Problem.java, I make it like this

class Problem
{
   Problem(String s)
  {
        message = s;
  }
}

So I write code to display the warning like this :

    void displayProblem(Problem p)
    {

        JOptionPane.showMessageDialog(this,p, "WARNING!",JOptionPane.WARNING_MESSAGE);
    }

I expect error message when I don't put tile something like this : "no tiles placed" just like what's in the code but it ended up like this :

What's wrong with my code anyway?

Answer 1

You either need to pass p.message to the dialog or override Problem's toString() method and return message there. What you're seeing is the output of standard toString() , ie class name + instance id.

Btw, you posted a lot of irrelevant code, which might make a lot of people want to either close the question or prevent them from trying to answer. When asking questions you should try and boil it down to the relevant parts, which in your case would be how you display the dialog and what the parameters look like. For more information, have a look here: https://stackoverflow.com/help/how-to-ask