Chapter 20.1, Problem 3SC

Explanation of Solution

Stacking buttons one after another:

In order to stack three buttons one after the other it is recommended to place the buttons created into the panel with the GridLayout that will have three rows and one column.

Snippet:

JPanelkeypadPanel = new JPanel();

keypadPanel.setLayout(new BorderLayout());

buttonPanel = new JPanel();

buttonPanel...