need help to delete the lines and use the shift key to move in JAVA

Simple Drawing Application

This project involves writing a JavaFX application which draws short line segments in response to the user typing the arrow keys on the keyboard.

The line starts from the center of the pane and draws in the direction corresponding to which arrow key the user types: RIGHT, UP, LEFT, or DOWN.

If the user types the DELETE key, then all line segments should be erased. The KeyCode constants are defined in the

javafx.scene.input.KeyCode

class.

Move vs. Draw

If you have time, and would like to try an additional feature, consider this idea: service the arrow keys will DRAW a line segment in response to the key typed. feature where, if the user holds down the SHIFT key while hitting an arrow key, then the code does a MOVE to the new X, Y position, without actually drawing anything. Then, if the user types another (unshifted) arrow key, the next line segment will be drawn starting at the new location.