有人可以告訴我,我不能建立此代碼? Gauge有問題,但我不明白我需要改變什麼或什麼。 當我嘗試Bulid時,它顯示錯誤。 Building "Alert01"
warning: [options] source value 1.3 is obsolete and will be removed in a future release
warning: [options] target
當我嘗試作爲hoaz說來運行一個線程,然後它給下面的錯誤 startApp threw an Exception
java.lang.NullPointerException
java.lang.NullPointerException
at threadlearn.Midlet.startApp(Midlet.java:28)
MIDlet.java public class