classcastexception

问题 Im getting a ClassCastException that shouldnt be happening. Here is the code: TwitterApplication ta = (TwitterApplication)getApplication(); OAuthProvider p = ta.getProvider(); As you see im trying to cast TwitterApplication from an Application. public class TwitterApplication extends Application { private Twitter twitter; public Twitter getTwitter(){ return this.twitter; } public void setTwitter(Twitter t){ this.twitter = t; } private OAuthProvider provider; private CommonsHttpOAuthConsumer

问题 I have a custom TextView looking like this: public class ClickTextView extends TextView { public ClickTextView(Context context, AttributeSet attrs) { super(context, attrs); } // and so on... } Why is the code below giving me a ClassCastException? @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // CLASS CAST EXCEPTION HERE, this is line 69 ClickTextView tvClicks = (ClickTextView) findViewById(R.id.tvClicks); }

问题 I have been looking and trying the tutorials I have googled for casting named query results for the last 4 hours and have not found a workable solution. When I run the snippit of code below I receive a java.lang.ClassCastException error (see below). I switched from getting the whole record result using sessionCriteria (which worked) to only returning 3 of the table columns using getNamedQuery . Original Code Block Criteria sessionCriteria = session.createCriteria(RunContainer.class);

问题 I created a report using JasperSoft Studio. I'm referencing to this helpful post Jaspersoft Studio: How to use Collection of Java Beans in data adapter by Alex K I'd like to retrieve a list of orders. The class Order is defined as in the post: public class Order { private double price; private int quantity; private Product product; // Getters & Setters } The report is generated with success if I'd like to retrieve price or quantity . But, once I retrieve product this is displayed: Details:

问题 I have a .jar file added to the CLASSPATH of the JBoss 5 startup (run.bat/run.sh) file. This is a dependency jar which is referred to from the servlet based application. If I use this setup, the servlet loads fine and works as expected. However, I noted that if I have the same jar in the servlet's WEB-INF/lib directory, I get a class cast exception as follows: ERROR [STDERR] ERROR: com.idoox.wasp.ProtocolRepositoryImpl - Exception in protocolHandler soap, protocolHandler com.server.saaj.soap

问题 I developed a simple listview application and it displays the listview but when I'm selecting a single listview I get the following error. This is my single list item XML file. <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/product_label" android:layout_width="fill_parent" android:layout_height=

问题 I'm having following problem: My project consists out of two packages (Client and Server), where each of them has the class Package . Now i want to send this class over the network via ObjectOutputStream / ObjectInputStream like this: //Client - this is in package client ObjectOutputStream out = new SocketOutputStream(socket.getOutputStream); Package package = new Package(); out.writeObject(package); //Server - this is in package server ObjectInputStream in = new SocketInputStream(socket

问题 Hopefully this will be the last question from this Spring MVC newbie. When I try to call the front page of my Spring 3.2 MVC web application on Tomcat 7.0, I get an HTTP Error 500 with the following errors in my console. Error in console: SEVERE: Servlet.service() for servlet [jcbulboard] in context with path [/jcbulboard] threw exception [Unable to initialize TldLocationsCache: org.apache.tomcat.util.scan.StandardJarScanner cannot be cast to org.apache.tomcat.JarScanner] with root cause java

问题 I have a interesting problem. When I started glassfish server, everythings work fine. But, I changed some code and published the server, and I run my client ( SistemGirisClientKullaniciDogrula ). The application throws this exception: java.lang.ClassCastException: tr.com.app.Kullanici cannot be cast to tr.com.app.Kullanici. Interesting part is, after the Glassfish server restart, application works fine. I am using restlet-spring-hibernate. And I am also using JAXB (org.restlet.ext.jaxb.jar)

问题 I play around with the 'searchable dictionnary' to get into Android development. My problem is that I get some ClassCastException when modifying the XML layouts. My guess is that the R file is outdated, but what is weird is that I still have the problem even after recreating it. Here are the releveant piece of code and log : The log file : Caused by: java.lang.ClassCastException: android.widget.ImageButton E/AndroidRuntime( 438): at eu.accleaner.android.WordActivity.onCreate(WordActivity.java