Chapter 15.13, Problem 15.13.3CP

Explanation of Solution

Purpose of the USMap.java:

• The purpose of the code is to display the US map.
• The size of the map gets resized when the up and down is pressed in the key board.
• The UP arrow is used to enlarge the map.
• The DOWN arrow is used to shrink the map size.
• The map can be filled with color when the mouse buttons are pressed.
• When the primary button is pressed it fills red and when secondary button is pressed it fill blue and when the middle button is pressed it fill white color when it is clicked on every polygon that is created in the map.

Purpose of the line 21:

The purpose of the line is to perform a key event when a key press is made:

//set the action event

map.setOnKeyPressed(e ->

{

//condtion to validate the key UP

if (e.getCode() == KeyCode...