Question

当我点击我的程序中一个应该将数据发送到数据库的按钮时，我收到此错误：

    Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(Unknown Source)
    at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(Unknown Source)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    ... 108 more
Caused by: java.lang.NullPointerException
    at controller.RegisterController.reg(RegisterController.java:23)
    ... 60 more

以下是代码本身的一部分：

package controller;

public class RegisterController {

  public void initialize() {}

  public void reg(){
      String gender = null;

     line 23 ----> if(radioMale.isPressed()){
          gender = "male";
      }
      if(radioFemale.isPressed()){
          gender = "female";
      }

      String query = "INSERT INTO Main (USERNAME,PASSWORD,BirthDate,Gender) VALUES (" + "'" + username.getText() +
              "'," + "'" + password.getText() + "'," + "'" + date_picker.getValue() + "'," + "'" + gender + "');";

      insertStatement(query);
  }

P.S。我从代码和错误中删除了很多，因为该网站没有让我发布这么多代码。但我相信这个问题应该在某处

JavaFX Applicacation Thread中的InvocationTargetException

0 个答案: