adding graphic version

Console.java

 package com.company;
 
-public class Console {
+public class Console extends Display {
 
+    public Console(byte displayType) {
+        super(displayType);
+    }
+
+    @Override
+    public void display(int[][] a1, int[][] a2) {
+        super.display(a1, a2);
+        System.out.println("  A B C D E F G H");
+        for (int i = 1; i <= 8; i++) {
+            for (int j = 1; j <= 8; j++) {
+                if (a2[j][i] != 0) {
+                    // the unicode of white circle (there is a player2 disc)
+                    System.out.print('\u25CB');
+                }
+                else {
+                    if (a1[j][i] != 0) {
+                        // the unicode of black circle (there is a player1 disc)
+                        System.out.print('\u25CF');
+                    }
+                    else
+                        // the unicode of white square (a blank)
+                        System.out.print('\u25A1');
+                }
+                System.out.print(" ");
+            }
+            System.out.println();
+        }
+    }
 }

Display.java

+package com.company;
+
+public class Display {
+    private byte displayType;
+    public Display(byte displayType){
+        this.displayType = displayType;
+    }
+
+    /**
+     * displays the place of black and white discs and blanks (will be overridden in console and graphic version)
+     * @param a1 array of the player1's discs
+     * @param a2 array of the player2's discs
+     */
+    public void display(int[][] a1, int[][] a2){
+
+    }
+}

Players.java

@@ -80,38 +80,7 @@ public class Players {
         }
     }
 
-    /**
-     * displays the place of black and white discs and blanks
-     * @param a1 array of the player1's discs
-     * @param a2 array of the player2's discs
-     * @param displayType type of display
-     */
-    public void display(int[][] a1, int[][] a2, byte displayType){
-        if (displayType == 0) {
-            System.out.println("  A B C D E F G H");
-        }
-        for (int i = 1; i <= 8; i++){
-            if (displayType == 0)
-                System.out.print(i+ " ");
-            for (int j = 1; j <= 8; j++) {
-                if (containsInArray(a2, j, i)) {
-                    // the unicode of white circle (there is a player2 disc)
-                    System.out.print('\u25CB');
-                }
-                else {
-                    if (containsInArray(a1, j, i)) {
-                        // the unicode of black circle (there is a player1 disc)
-                        System.out.print('\u25CF');
-                    }
-                    else
-                        // the unicode of white square (a blank)
-                        System.out.print('\u25A1');
-                }
-                System.out.print(" ");
-            }
-            System.out.println();
-        }
-    }
+
 
     /**
      * this method checks if the move is possible, then equalize the color of the