【求助】扫雷游戏编译没错误，但不出现界面（菜鸟）

代码运行后只出现一个手机模拟器，上面的其他东西不显示，运行完控制台窗口出现提示如下：
Running with storage root C:\Users\Lcf\j2mewtk\2.5.2\appdb\DefaultGrayPhone
Running with locale: Chinese (Simplified)_People's Republic of China.936
Running in the maximum security domain
java.lang.ClassNotFoundException: Mine
    at com.sun.midp.midlet.MIDletState.createMIDlet(+29)
    at com.sun.midp.midlet.Scheduler.schedule(+52)
    at com.sun.midp.main.Main.runLocalClass(+28)
    at com.sun.midp.main.Main.main(+80)
Execution completed.
3417934 bytecodes executed
15 thread switches
1667 classes in the system (including system classes)
17761 dynamic objects allocated (526648 bytes)
1 garbage collections (0 bytes collected)
我刚学j2me，一窍不通，望大家多多指点！！（代码是一个书上的代码，自己看着代码学）

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怎么没人理我啊
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我不懂啊不敢乱发评论啊
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