java - How do I get my JFrame that displays an array of JPanels to update itself? -

i'm building board game cs course, i've started engine - backbone - , i've perfected it, i'm still stuck on gui part though. in engine, have double array initialises board pieces, , has getwinner , move methods. in gui part, created jframe , set layout gridlayout, , i've double array there checks engine's array , prints board board pieces accordingly.. however, whenever move, engine's array registers move doesn't displayed on jframe.. i've no idea on how it.. here's main class in gui package:

package eg.edu.guc.loa.gui;  import java.awt.*; import java.util.arraylist;  import javax.swing.*;  import eg.edu.guc.loa.engine.*; import eg.edu.guc.loa.engine.point;  @suppresswarnings("serial") public class loa extends jframe{      static tiles[][] jboard;     static board b = new board();     static color temp;     static color col1 = color.dark_gray;     static color col2 = color.light_gray;     static jframe loa = new jframe();     jbutton b1, b2;      public loa(){         jboard = new tiles[8][8];         loa.setlayout(new gridlayout(8, 8));         initboard();         loa.setsize(600, 600);         loa.setvisible(true);         loa.setlocationrelativeto(null);         loa.setdefaultcloseoperation(jframe.exit_on_close);         b.printboard();     }      public static void initboard(){         remove();         b.printboard();          for(int = 0; i<8; i++){             if (i%2 == 0){                 temp = col1;             }             else{                 temp = col2;             }             for(int j = 0; j<8; j++){                 jboard[i][j] = new tiles(temp, i, j);                 loa.getcontentpane().add(jboard[i][j]);                 if (temp.equals(col1)){                     temp = col2;                 }                 else{                     temp = col1;                 }                  if(b.getpiece(new point(j, i)).getplayer() == boardcell.player_1_piece){                     jboard[i][j].haschecker(true);                     jboard[i][j].setwhite(true);                     jboard[i][j] = new tiles(temp, i, j);                  }                 if(b.getpiece(new point(j, i)).getplayer() == boardcell.player_2_piece){                     jboard[i][j].haschecker(true);                     jboard[i][j].setwhite(false);                     jboard[i][j] = new tiles(temp, i, j);                 }              }         }     }      public static void remove(){         for(int = 0; i<8;i++){             for(int j = 0; j<8; j++){                 if(jboard[i][j] != null)                     loa.remove(jboard[i][j]);             }         }     }        public static void main (string [] args){         new loa();          }  } 

any appreciated.. in advance.

edit: b.print() prints engine's array on console, , remove() attempt on removing old frame , building new 1 based on new updated array (with moved piece), failed.

as shown in simpler mvcgame, can arrange view register listener model using observer pattern. user gestures should update model; when notified model, view should render current state of model. there should no drawing in model , no game logic in view.