这是什么错呀?java.lang.ClassCastException:$Proxy14 cannot be cast to com.wen.service.basjava.lang.ClassCastException:$Proxy14 cannot be cast to com.wen.service.base.impl.BuyerServiceBeanat com.wen.service.UserServiceTest.setUpBeforeClass(UserSe

java.lang.IllegalStateException是什么? java.lang.ClassCastException:android.widget.Button是什么错? 这是什么错呀?java.lang.ClassCastException:$Proxy14 cannot be cast to com.wen.service.basjava.lang.ClassCastException:$Proxy14 cannot be cast to com.wen.service.base.impl.BuyerServiceBeanat com.wen.service.UserServiceTest.setUpBeforeClass(UserSe 求问java.lang.IllegalStateException是什么? 问问大虾们这是什么错啊 Caused by:java.lang.ClassCastException:android.view.AbsSavedState$1Caused by:java.lang.ClassCastException:android.view.AbsSavedState$1 cannot be cast to android.widget.CompoundButton$SavedState java.lang.ClassCastException:android.widget.ExpandableListViewExpandableListContextMenuInfo求高手解答这是什么错误,怎么解决 CLA是什么 ClA是什么 java.lang.IllegalStateException是什么回事?我这几天运行程序的时候总是出现以下运行结果,java.lang.IllegalStateExceptionorg.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:423)org.apache.jsp.chklogon_js java.lang.illegalstateexception java.lang.InstantiationException是什么意思 java.lang.IllegalArgumentException是什么意思 Java.lang.outofmemovyerror是什么意思 java.lang.NoSuchMethodError:getViewUnit java.lang.NoSuchMethodException是什么意思 java.lang.IllegalStateException:getOutputStream() has already been called for this response这是什么错误?源代码：生成验证码 private java.lang.String name;这是在定义什么? java.lang.Error:Unresolved compilation problems 这是什么问题,怎么改正?java.lang.Error:Unresolved compilation problems:The import org.wltea cannot be resolved The import org.wltea cannot be resolved IKSegmenter cannot be resolved to a type I