Chapter 20.1, Problem 2SC

Explanation of Solution

Adding two buttons:

In order to add two buttons to the northern position in the frame such that they are showed next to each other it is recommended to first add both the buttons into the panel and then by adding the panel to the north end of the frame.

Snippet:

JPanel keypadPanel = new JPanel();

keypadPanel.setLayout(new BorderLayout());

buttonPanel = new JPanel();

buttonPanel...