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我试图插入两个字段(JCombobox
中的优先级和根据组合中选择的选项获得的ID),并完成其余字段(全部字符串)提交所有......但我发现这个堆栈跟踪:在ClassCastException从数据库中的组合框中插入数据
run:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: br.com.jdbc.victor.model.PriorityDetail cannot be cast to java.lang.String
at br.com.jdbc.victor.view.FormNewCall.btSubmitActionPerformed(FormNewCall.java:349)
at br.com.jdbc.victor.view.FormNewCall.access$500(FormNewCall.java:30)
at br.com.jdbc.victor.view.FormNewCall$6.actionPerformed(FormNewCall.java:151)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)
at java.awt.Dialog.show(Dialog.java:1084)
at java.awt.Component.show(Component.java:1671)
at java.awt.Component.setVisible(Component.java:1623)
at java.awt.Window.setVisible(Window.java:1014)
at java.awt.Dialog.setVisible(Dialog.java:1005)
at br.com.jdbc.victor.view.FormNewCall.lambda$main$0(FormNewCall.java:495)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
在这两条线:
private void btSubmitActionPerformed(java.awt.event.ActionEvent evt) {
try {
Call call = new Call();
MySQLDaoManager man = new MySQLDaoManager("root", "", "localhost", "attendances", 3306);
java.util.Date date_util = new java.util.Date();
java.sql.Date date_sql = new java.sql.Date(date_util.getDate());
java.sql.Time time_sql = new java.sql.Time(date_util.getTime());
try {
//ClassCastException at this line above
call.setPriority((String) cbPriorityDetail.getSelectedItem());
//this one is giving SQL Error and it's flagged by the Catch block of the code
call.setPriorityDetail(Long.parseLong(tfIdPriorityDetail.getText()));
call.setInitialDate(date_sql);
call.setInitialTime(time_sql);
call.setFinalTime(time_sql);
man.getCallDAO().insert(call);
if(tfCallId.getText().length() != 0){
call.setCallId(Long.parseLong(tfCallId.getText()));
man.getCallDAO().update(call);
}
if(tfInitialDate.getValue() != null && tfInitialTime.getValue() != null && tfFinalTime.getValue() != null){
JOptionPane.showMessageDialog(rootPane, "Inserted User sucessful!!", "Done", JOptionPane.INFORMATION_MESSAGE);
btNewActionPerformed(evt);
} else {
JOptionPane.showMessageDialog(rootPane, "Please fill the fields again", "Isn't possible to insert data", JOptionPane.INFORMATION_MESSAGE);
btNewActionPerformed(evt);
}
} catch (DAOException ex) {
JOptionPane.showMessageDialog(rootPane, "MySQL Error", "Error", JOptionPane.ERROR_MESSAGE);
}
} catch (SQLException ex) {
JOptionPane.showMessageDialog(rootPane, "Error to get connection", "Error", JOptionPane.ERROR_MESSAGE);
}
}
这种形式的工作在这样:你在JComboBox
选择一个项目高,中,低之间d tfIdPriorityDetail
根据选定的优先级获得相应的ID(我已经做了一个功能,它做的很好),并填写下面三个字段:初始日期,初始时间和最终时间...如果我评论这两条线这是错误的,并提交其余的工作正常。 我需要关于我的代码有什么问题的帮助?我无法在Calls表中插入选定的组合项和生成的ID,我总是面临这些错误,非常感谢!
嗨eltabo !!!我已经看到了消息,我已经通过试验和错误修复了错误,我确实喜欢这样: chamado.setPrioridade(cbPrioridadeDetalhe.getSelectedItem()。toString());并在我应该投给诠释它的作品...我想奇怪我不知道投入与放在括号和.toString()的类型之间的差异;非常感谢您的帮助!!! –
看看这些解释:[http://stackoverflow.com/questions/5289393/casting-variables-in-java](http://stackoverflow.com/questions/5289393/casting-variables-in-java) [http://stackoverflow.com/questions/3615721/how-to-use-the-tostring-method-in-java](http://stackoverflow.com/questions/3615721/how-to-use-the-的toString-方法-在-java的) – eltabo