Problem
Create the necessary Java source code files to implement a callback method from two child windows to a parent window, as displayed in Figure 10-64. When the user clicks the Display Child 1 button in the Parent for Callback Test window (Figure 10-64a), that window is hidden and the Child One window is visible (Figure 10-64b). When the user clicks the Go Back to Parent button in the Child One window, the Child One window is hidden, and the Parent for Callback Test window is visible (Figure 10-64a). The same action occurs for the Display Child 2 button and the Child Two window (Figure 10-64c). The Parent for Callback Test window must implement an interface that provides a callback method.
