java - How to sleep a button setText? -

hey guys trying make game of matching cards. if 2 cards match user gets point , cards stay visible, otherwise flip them (or settext("")) did research swing sleep wasn't sure how implement in code. have tried can't work. have code running in main.

actionlistener buttonlistener = new actionlistener() {          @override         public void actionperformed(actionevent e)         {             jbutton selectedbutton = (jbutton)e.getsource();              (int row = 0; row < 6;row++){                     for(int col = 0; col < 6; col++){                         if (buttons[row][col] == selectedbutton){                             flipcard(row, col);                             if(stack.empty()){                                 stack.push(row+","+col);                             }else{                                 string word = (string)stack.pop();                                 string[] ar = word.split(",");                                 system.out.println(ar[0] + " " + ar[1]);                                 if (cardlist.getcardnode(row, col).getletter() ==                                         cardlist.getcardnode(integer.parseint(ar[0]),                                         integer.parseint(ar[1])).getletter()){                                     system.out.println("equal");                                 }else{                                     system.out.println("not equal");                                     //compiler complains                                      //exception in thread "awt-eventqueue-0" java.lang.classcastexception: javax.swing.timer cannot cast javax.swing.jbutton                                     timer timer = new timer(100 ,this);                                     timer.setrepeats(false);                                     timer.start();                                     buttons[row][col].settext("");                                     buttons[integer.parseint(ar[0])]                                             [integer.parseint(ar[1])].settext("");                                 }                             }                         }                     }             }         }     }; 

i "think" should doing more like...

timer timer = new timer(100, new actionlistener() {     @override     public void actionperformed(actionevent evt) {         //pop stack coordinates , set them ""         //settext on button clicked ""         system.out.println(cardlist.getcardnode(row, col).getletter());             } }); timer.setrepeats(false); timer.start(); 

which will, after delay of 100 milliseconds, call actionlistener's actionperformed method, allowing reset state of ui...

problem inside loop , have access row , col clicked

then create actionlistener take required information , act upon when actionperformed method called...

public class flipperhandler implements actionlistener {     private jbutton[] buttons;     private int[] card1, card2;      public flipperhandler(jbutton[] buttons, int[] card1, int[] card2) {         this.buttons = buttons;         this.card1 = card1;         this.card2 = card2;     }      @override     public void actionperformed(actionevent evt) {         buttons[card1[0]][card1[1]].settext("");         buttons[card2[0]][card2[2]].settext("");          } } 

then use timer...

timer timer = new timer(100, new flipperhandler(buttons,                                          new int[]{row, col},                                         new int[]{integer.parseint(ar[0]), integer.parseint(ar[1])}); timer.setrepeats(false); timer.start();