oop - How to have two timers for Java game applet -

I need two timers to run a game, like move objects, and check the other and vice versa Counting Timer As I have tried the following:

  timer countdown timer = new timer (1000, this); Timer game timer = new timer (30, this); Public Zero Init () {this.actionPerformed (this); // Add action listener to content pane} @ Override Public Records ActionPerform (Action Source E.E.) {if (EGS Source) == GameTimeer} {// Control Game]} (E. Gets ource () = = Countdown timer} {/ dellmanate timer}}   
 However, when I try to run the applet, it gives a null pointer exception how do I differentiate each timer from the other Separate and desired on every timer tick Do Ary. Thanks   
 
 
 I assume that you use  javax.swing.Timer  this.actionPerformed (this);  does not look correct, because your applet is not  ActionEvent . In addition, you should start a timer in the  init ()  method:  
  Expels the public class gameplay Appel ActionListener Public Zero init () {countdownTimer = New Timer ( 1000, this); GameTimer = New timer (30, this); CountdownTimer.start (); GameTimer.start (); } @ Override Public Records ActionPerfed (Action Given E) {If (E.Gates ource () == GameTime) {// Control Game]} (EASSS) == Countdown timer) {// Delmonat timer}}}   
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