Java Check Point 67 Interface 3

Summary

Add coordinates to the polygon and place it in a proper layout pane. You cannot provide a method body { } for a regular abstract method in an Compiles? Yes. Runs successfully? No — throws ClassCastException at runtime. n1 is an Integer object whose compareTo ... The problem in the code is that the Person class does not implement the Comparable If a class implements the Comparable The code you provided is not legal. To make it legal, change protected void unfinished(); to protected abstract void unfinished();. Pane pane = new Pane(circle); This is possible because the Pane constructor allows you to pass nodes directly to it. In this case ...