Chapter 07 section 02 codes updated.

Author: liuyubobobo

07-Mine-Sweeper/02-Mine-Sweeper-Basics/src/AlgoVisualizer.java

@@ -7,7 +7,6 @@ public class AlgoVisualizer {
 
     private MineSweeperData data;
     private AlgoFrame frame;
-    private static final int d[][] = {{-1,0},{0,1},{1,0},{0,-1}};
 
     public AlgoVisualizer(int N, int M, int mineNumber){
 

07-Mine-Sweeper/02-Mine-Sweeper-Basics/src/MineSweeperData.java

@@ -4,7 +4,7 @@ public class MineSweeperData {
     public static final String flagImageURL = "resources/flag.png";
     public static final String mineImageURL = "resources/mine.png";
     public static String numberImageURL(int num){
-        if(num < 0 || num >= 8)
+        if(num < 0 || num > 8)
             throw new IllegalArgumentException("No such a number image!");
         return "resources/" + num + ".png";
     }