Create action class

src/model/Action.java

+package model;
+
+import java.awt.*;
+
+public class Action extends Hotkey implements InputEmulator{
+    /**
+     * Robot which simulates user key presses
+     */
+    Robot robot;
+
+    /**
+     * Constructs an immutable hotkey.
+     * @param keyCode  The virtual keycode of the hotkey.
+     * @param id       The unique ID of the hotkey.
+     * @param modifier The modifier of the hotkey.
+     */
+    public Action(int keyCode, int id, Modifier modifier) throws AWTException {
+        super(keyCode, id, modifier);
+        this.robot = new Robot();
+
+    }
+
+    /**
+     * Sends a given key to be emulated.
+     * @param keyCode The virtual keycode of the key.
+     * @param release True if the key is to be a key release input.
+     */
+    @Override
+    public void sendKey(int keyCode, boolean release) {
+        if (release) {
+            robot.keyPress(this.getKeyCode());
+            robot.keyRelease(this.getKeyCode());
+        }
+    }
+}