playground -> putRandom | int[][] upgraded!

src/PlayGround.java

@@ -30,18 +30,34 @@ public class PlayGround {
         }
     }
 
-    public void putRandom() {
+    public int[][] putRandom() {
+        int[][] positions = new int[policeNumbers + 1][2];
         int i, j, k;
         Random rand = new Random();
-        if (n * m > policeNumbers)
-            for (k = 0; k < policeNumbers; k++) {
+        if (n * m < policeNumbers) System.out.println("Error!! NOT ENOUGH SPACE FOR POLICES AND THIEF IN GROUND");
+        else {
+            for (k = 0; k < policeNumbers; k++) {       // police
                 i = rand.nextInt();
                 j = rand.nextInt();
-                if (ground[i][j] == 0)
+                if (ground[i][j] == 0) {
                     ground[i][j] = 1;
-                else k--;
+                    positions[k][0] = i;   // x
+                    positions[k][1] = j;   // y
+                } else k--;
             }
-        else System.out.println("Error!! police numbers are higher than n*m");
+
+            for (k = 0; k < 1; k++) {                   // thief
+                i = rand.nextInt();
+                j = rand.nextInt();
+                if (ground[i][j] == 0) {
+                    ground[i][j] = 1;
+                    positions[policeNumbers][0] = i;   // x
+                    positions[policeNumbers][1] = j;   // y
+                }
+            }
+        }
+
+        return positions;
     }
 
     public void change(int[][] newPolicesSituation, int xThief, int yThief) {
@@ -49,6 +65,7 @@ public class PlayGround {
         for (i = 0; i < n; i++)
             for (j = 0; j < m; j++)
                 ground[i][j] = 0;
+
         for (i = 0; i < policeNumbers; i++)
             ground[newPolicesSituation[i][0]][newPolicesSituation[i][1]] = 1;