close the timer

WatcherGui/src/main/java/com/joelhelkala/watcherGui/frames/WelcomePage.java

@@ -52,6 +52,7 @@ public class WelcomePage implements MouseListener, ActionListener {
 	private static JFrame frame;
 	
 	private static JLabel chosen_label;
+	private static final Timer timer = new Timer();
 	
 	private static NodeDataFrame nodeDataFrame = new NodeDataFrame(leftPanelWidth, topPanelHeight, width-leftPanelWidth, height-topPanelHeight-bottomPanelHeight);
 	private static NodeSettingsFrame nodeSettingFrame = new NodeSettingsFrame(width-leftPanelWidth, height-topPanelHeight-bottomPanelHeight);
@@ -202,8 +203,6 @@ public class WelcomePage implements MouseListener, ActionListener {
 	 * Polls the backend for new data every given interval
 	 */
 	private static void PollData() {
-		final Timer timer = new Timer();
-
         timer.scheduleAtFixedRate(new TimerTask() {
         	int timeRemaining = pollInterval;
             public void run() {
@@ -300,6 +299,7 @@ public class WelcomePage implements MouseListener, ActionListener {
 		
 		if(result == JOptionPane.YES_OPTION) {
 			User.clear();
+			timer.cancel();
 			frame.dispose();
 			LoginPage login = new LoginPage();
 		}
@@ -389,6 +389,7 @@ public class WelcomePage implements MouseListener, ActionListener {
 		JOptionPane.showConfirmDialog(frame, message, title,
 	               JOptionPane.ERROR_MESSAGE);
 		User.clear();
+		timer.cancel();
 		frame.dispose();
 		LoginPage login = new LoginPage();		
 	}