java マインスイーパーの制作（０のマスの拡張方法について）

前提・実現したいこと

javaでマインスイーパーを作っています。
そこそこ完成されたマインスイーパーを改良しようとしているのですが、
マインスイーパーで０が出た際に数字が出るまで０のマスを拡張する方法がわかりません。自分で色々試してみたのですが（６６－９７あたり）、わからないので教えていただければ幸いです。

該当のソースコード

java
1import java.util.Scanner;
2
3public class MineSweeper extends MinePrinter {
4
5public static void main(String[] args) {
6
7Scanner sc = new Scanner(System.in);
8
9int round =1;
10
11MineSweeper game = new MineSweeper();
12while(!game.dead){
13System.out.println("\nRound"+round );
14
15game.displayStrblock();
16
17if(round > 1)  System.out.println("：残りの爆弾数･･･" + game.mines);
18System.out.println("\n：場所を指定してください");
19System.out.println("ﾀﾃ？");
20int tate = Integer.parseInt(sc.next());
21
22System.out.println("ﾖｺ？");
23int yoko = Integer.parseInt(sc.next());
24
25
26game.mineClick(tate, yoko, round);
27
28round = round +1;
29
30
31}
32sc.close();
33
34
35}
36
37}
38
39
40class MinePrinter {
41
42String[][] strblock = new String[7][7];
43int[][] blocks = new int[7][7];
44int mines = 0;
45boolean dead = false;
46int ans = 0;
47
48
49public MinePrinter() {
50mineSet();
51
52}
53
54void mineClick(int i, int j,int round) {
55    if (aroundManyMines(i, j) == 99 && round>1) {
56    strblock[i][j] = "*";
57    displayStrblock();
58    System.out.println("\n burst!!!");
59    System.out.println("You Dead!!\n");
60    dead = true;
61    } else {
62        if(round >1){
63            
64            strblock[i][j] = Integer.toString(aroundManyMines(i, j));
65
66            for(blocks[i][j]=0 ;blocks[i][j]>0;i++,j++)
67            try{strblock[i][j] = Integer.toString(aroundManyMines(i, j));
68            }catch (ArrayIndexOutOfBoundsException e){}
69
70            for (blocks[i][j]=0 ;blocks[i][j]>0;i++)
71            try{strblock[i][j] = Integer.toString(aroundManyMines(i, j));
72            }catch (ArrayIndexOutOfBoundsException e){}
73
74            for (blocks[i][j]=0 ;blocks[i][j]>0;i++,j--)
75            try{strblock[i][j] = Integer.toString(aroundManyMines(i, j));
76            }catch (ArrayIndexOutOfBoundsException e){}
77
78            for (blocks[i][j]=0 ;blocks[i][j]>0;j++)
79            try{strblock[i][j] = Integer.toString(aroundManyMines(i, j));
80            }catch (ArrayIndexOutOfBoundsException e){}
81
82            for (blocks[i][j]=0 ;blocks[i][j]>0;j--)
83            try{strblock[i][j] = Integer.toString(aroundManyMines(i, j));
84            }catch (ArrayIndexOutOfBoundsException e){}
85
86            for (blocks[i][j]=0 ;blocks[i][j]>0;i--,j++)
87            try{strblock[i][j] = Integer.toString(aroundManyMines(i, j));
88            }catch (ArrayIndexOutOfBoundsException e){}
89
90            for (blocks[i][j]=0 ;blocks[i][j]>0;i--)
91            try{strblock[i][j] = Integer.toString(aroundManyMines(i, j));
92            }catch (ArrayIndexOutOfBoundsException e){}
93
94            for (blocks[i][j]=0 ;blocks[i][j]>0;i--,j--)
95            try{strblock[i][j] = Integer.toString(aroundManyMines(i, j));
96            }catch (ArrayIndexOutOfBoundsException e){}
97            
98        }else{
99            blocks[i][j] = 0; 
100            mines = mines - 1;
101            strblock[i][j] = Integer.toString(aroundManyMines(i, j));
102        }
103    }
104    
105    
106}
107
108void mineSet() {
109for (int i = 0; i < blocks.length; i++) {
110for (int j = 0; j < blocks[i].length; j++) {
111if (Math.random() < 0) { // 爆弾の割合。
112blocks[i][j] = 99;
113mines += 1;
114} else {
115blocks[i][j] = 0;
116}
117}
118}
119for (int i = 0; i < strblock.length; i++) {
120for (int j = 0; j < strblock.length; j++) {
121strblock[i][j] = "#";
122}
123}
124}
125
126void displayStrblock() {
127System.out.println(" ");    
128for (int i = 0; i < strblock.length; i++) {
129for (int j = 0; j < strblock.length; j++) {
130System.out.print(strblock[i][j] + " ");
131}
132System.out.println(":" + i);
133}
134
135}
136
137int aroundManyMines(int i, int j) {
138if (blocks[i][j] == 99) {
139return 99;
140}
141
142int ans = 0;
143
144for (int r = -1; r <= 1; r++)
145for (int c = -1; c <= 1; c++) {
146try {
147if (blocks[i + r][j + c] == 99) {
148ans += 1;
149}
150} catch (ArrayIndexOutOfBoundsException e) {
151continue;
152}
153}
154return ans;
155}
156}