运行程序...莫名其妙的出错了....
错误信息如下: 
Exception in thread "Thread-2" java.lang.NullPointerException
at emulator.lcdui.b.a(Unknown Source)
at javax.microedition.lcdui.Alert.paint(Unknown Source)
at javax.microedition.lcdui.Screen.invokePaint(Unknown Source)
at emulator.i.run(Unknown Source)
at java.lang.Thread.run(Thread.java:619)


真不知道那里错了...

------解决方案--------------------
空指针异常，把代码贴一下，要不然谁知道哪里出错了呢
------解决方案--------------------
619行出错了