Explanation: In this program, the virtual key codes are used for the arrow keys. The key code is taken using
the method getKeyCode and stored in the code variable. In the program, lines are needed to be drawn
using arrow keys. For this purpose, the starting coordinate chosen is 30 and 50 and stored in px and py .
The same is stored in x and y also. Now depending on which arrow key is pressed, x and y are incremented/
decremented accordingly. For example, when left arrow key is pressed, x is decremented by 1 and when up
arrow key is pressed, y is decremented by 1. Outside the switch block, line is drawn from point ...
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