How do I refactor this:

That is in this class:

private void initialiseVehicle(String vehicleName) { if(vehicleName.equals("Boat")) { vehicle = new Boat("Apollo "); } else if(vehicleName.equals("Ship")) { vehicle = new Ship("Cruizz"); } else if(vehicleName.equals("Truck")) { vehicle = new Truck("Ford F-650"); } else if(vehicleName.equals("Motorcycle")) { vehicle = new Motorcycle("Suzuki"); } else if(vehicleName.equals("Bus")) { vehicle = new Bus ("Aero"); } else if(vehicleName.equals("Car")) { vehicle = new Car("BMW"); } else if(vehicleName.equals("Bicycle")) { vehicle = new Bicycle("A-bike"); } else if(vehicleName.equals("Helicopter")) { vehicle = new Helicopter("Eurocopter"); } else if(vehicleName.equals("Airplane")) { vehicle = new Airplane("BA"); } else if(vehicleName.equals("Tram")) { vehicle = new Tram("EdinburghTram"); } else if(vehicleName.equals("Train")) { vehicle = new Train("Virgin", 4); } } , 1 package oose.vcs; 2 3@import java.awt.BorderLayout; 4 import java.awt.Color; 5 5 import java.awt. Dimension; 2 6 import java.awt. EventQueue; 7 import java.awt.event.ActionEvent; 8 import java.awt.event.ActionListener; 9 import javax.swing.JButton; 10 import javax.swing.JComboBox; 11 import javax.swing.JFrame; 12 import javax.swing.JLabel; 13 import javax.swing.JToolBar; 14 import javax.swing.UIManager; 15 16 import vehicle.types. Airplane; 17 import vehicle. types. Bicycle; 18 import vehicle. types.Boat; 19 import vehicle.types. Bus; 20 import vehicle. types.Cari 21 import vehicle. types. Helicopter; 22 import vehicle.types. Motorcycle; 23 import vehicle.types. Ship; 24 import vehicle. types. Train; 25 import vehicle, types. Tram 26 42 import vehicle.types. Truck; 27 import vehicle.types. Vehicle; 28 29 39 31 32 33 public class Controller extends Simulatori 34 35 36 private static final long serialversionUID = -47812901511021127961; 37 38 39e enum Buttonstate { 40 Start, 41 Accelerate, 42 Cruise, 43 44 Stop: 45 } 45 47 private Vehicle vehicle; 48 static String[] vehicles = { "Boat", "Ship", "Truck", "Motorcycle", "Bus", "Car", "Bicycle", "Helicopter", "Airplane", "Tram", "Train"}; 49 private Simulator simulationPane; 59 private JLabel speed Label; 51 // private JButton buttoni ; 52 // private JButton button2; 53 11 private JButton button3; 54 // private JButton button4 ; 55 // private JButton buttons; 56 private ComboBoxString> combobox; 57 private JFrame frame; 58 private JButton [] buttons; private ButtonState state; private boolean accelerate, decelerate; static int currentvelocity = 1; static int maximum.velocity = 300; static String vehicleName; 59 60 61 62 63 64 65 66 67 680 69 70 71 720 736 740 75 76 77 78 79 80 81 82 83 84 85 86 876 BBC 89 90 91 92 93 94 95 96 97 98 99 10@ 101 102 103 104 105 106 107 108 109 11@ 111 112 113 114 public static void main(String args[]) { new Controller(); } public Controller() { EventQueue.invokelater(new Runnable() { goverride public void run() { try { UIManager.setLookAndFeel( UIManager.getCrossPlatformLookAndFeelClassName()); } catch (Exception e) { e.printStackTrace(); } frame = new JFrame("Vehicle Control System'); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); combobox = new JComboBox(vehicles); combobox.setSelectedIndex(6); combobox.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { int selectedIndex = combobox.getSelectedIndex(); vehicleName = vehicles (selectedIndex]; initialiseVehicle(vehicleName); } }); speed label = new JLabel(" contigstart(); configaccelerate(); configDecelerate(); configcruise(); configStop(); configButtons(); JToolBar toolBar =new JToolBar(); toolBar.setRollover(true); toolbar.add(combobox); toolBar.add(speedlabel); toolbar.add(buttoni); toolBar.add(button2); toolbar.add(button3); toolBar.add(button); toolBar.add (buttons); frame.add(toolBar, BorderLayout. NORTH); frame.setPreferredSize(new Dimension (800,200)); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); ) 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 1456 146 private void setState(ButtonState state) { this.buttons[this.state.ordinal()].setBackground (Color. LightGray); this.buttons (state.ordinal()].setBackground(Color.green); this.state = state; ) 147 148 149 150 151 152 153 1530 154 private void configButtons() { this.buttons = new JButton ButtonState.values().length); for (ButtonState state : ButtonState.values()) { JButton button = new JButton(state.name().toLowerCase()); button.setBackground (Color. LightGray); switch(state) { case Start: button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { start(e); } }); break; case Accelerate: button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { accelerate(e); } }); break; case Cruise: button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { cruise(e); } . 155 156 152 158 159 160 161 162 1630 . 164 165 166 167 168 169 170 1716 172 break; case Decelerate: button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { decelerate(e); } }); break; 173 174 175 176 177 178 179 180e 181 182 183 184 185 186 187 188 189 190 . 191 192 casc Stop: button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { stop(e); } }); break; } this.buttons (state.ordinal()] = button; } 193 194 195 196 197 198 199 200 201 202 private void start(ActionEvent e) { if(vehicle == null) { int selectedIndex = combobox.getSelectedIndex(); String vehicleName = vehicles (selectedIndex]; initialiseVehicle(vehicleName); speed Label.setText(vehicle.printSpeed()); } if(simulationPane !=null) { frame.remove( simulationPane); } this.setState(ButtonState.Start); simulationPane = new Simulator(); frame.add( simulationPane, BorderLayout.CENTER); frame. revalidate(); frame. repaint(); } 203 204 205 206 207 208 209 210 211 212 2130 214 215 2160 A217 218 219 220 221 222 223 224 225 226 227 228 229 private void accelerate(ActionEvent e) { this.setState(Buttonstate. Accelerate); Thread thread = new Thread() { public void run(){ try { while(accelerate) { Thread.sleep(2 * 1000); if (currentvelocity maximumvelocity) { currentvelocity = currentvelocity +1; vehicle.setCurrentSpeed(currentvelocity); speed label.setText(vehicle.printSpeed()); simulation Pane. updateTimer(); catch (InterruptedException e) { e.printStackTrace(); } } }; thread.start(); } private void cruise(ActionEvent e) { this.setState (ButtonState.Cruise); } private void decelerate(ActionEvent e) { this.setState (ButtonState.Decelerate); Thread thread = new Thread() { public void run() { try { while(decelerate) { Thread.sleep(2 * 1000); 230 231 232 233 234 235 236 237 238 2390 240 241 242 2430 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 if(currentvelocity >1) { currentvelocity = currentvelocity -1; vehicle.setCurrentSpeed (currentvelocity); speedlabel.setText(vehicle.printSpeed()); simulationPane.updateTimer(); } } } catch (InterruptedException e) { e.printStackTrace(); } } }; thread.start(); } private void stop(ActionEvent e) { this.setState (ButtonState.Stop); currentvelocity = 1; vehicle.setCurrentSpeed(currentvelocity); speedlabel.setText(vehicle.printSpeed()); simulationPane. updateTimer(); } 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 private void initialiseVehicle(String vehicleName) { if(vehicleName.equals("Boat")) { vehicle = new Boat("Apollo "); } else if(vehicleName.equals("Ship")) { vehicle = new Ship("Cruizz"); } else if(vehicleName.equals("Truck")) { vehicle = new Truck("Ford F-650"); } else if(vehicleName.equals("Motorcycle")) { vehicle = new Motorcycle("Suzuki"); } else if(vehicleName.equals("Bus")) { vehicle = new Bus("Aero"); } else if(vehicleName.equals("Car")) { vehicle = new Car("BMW"); } else if(vehicleName.equals("Bicycle")) { vehicle = new Bicycle("A-bike"); } else if(vehicleName.equals("Helicopter")) { vehicle = new Helicopter("Eurocopter"); } else if(vehicleName.equals("Airplane")) { vehicle = new Airplane("BA"); } else if(vehicleName.equals("Tram")) { vehicle = new Tram("EdinburghTram"); } else if(vehicleName.equals("Train")) { vehicle = new Train("Virgin", 4); } } }