logo
down
shadow

java.lang.ClassCastException: javax.mail.Session cannot be cast to javax.mail.Session


java.lang.ClassCastException: javax.mail.Session cannot be cast to javax.mail.Session

By : Codar
Date : November 25 2020, 07:22 PM
help you fix your problem This problem occurs in the server because the lib of Tomcat and you application both have their own copy of mail.jar (in WEB-INF/lib), so the classloaders can load two different Session.If you delete the mail.jarfrom your application, this problem will be solved.
code :


Share : facebook icon twitter icon
java.lang.ClassCastException: javax.mail.internet.MimeMultipart cannot be cast to java.lang.String         at NewClass.m

java.lang.ClassCastException: javax.mail.internet.MimeMultipart cannot be cast to java.lang.String at NewClass.m


By : user3336075
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further This is the code that is intended to fetch up the email from Gmail server. Along with it also brings the subject and the sender separately. The inbox that i am checking has 5 messages.(some read and some unread) I wanted the html content to be visible , so i used JEditorPane , The error is here
code :
JEditorPane ep = new JEditorPane("text/html" , (String)msgs[i].getContent());
java.lang.ClassCastException: java.lang.String cannot be cast to javax.mail.Multipart

java.lang.ClassCastException: java.lang.String cannot be cast to javax.mail.Multipart


By : Naveesh Doolhur
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Understand the Exception First!!!
Your message content returning String and you are trying to type cast to Multipart.
code :
Object content = msg.getContent();  
if (content instanceof String)  
{  
    String body = (String)content;  
    ...  
}  
else if (content instanceof Multipart)  
{  
    Multipart mp = (Multipart)content;  
    ...  
}  
maven jetty plugin : javax.mail.Session cannot be cast to javax.mail.Session

maven jetty plugin : javax.mail.Session cannot be cast to javax.mail.Session


By : Corey Engelhart
Date : March 29 2020, 07:55 AM
This might help you OK, this is baffling me. I am trying to get the jetty maven plugin running with mail. I am restricted to 6.1.15 because we are using JDK 1.6. , I fixed it using the following property
code :
<configuration>
   <systemProperties>
     <systemProperty>
        <key>org.mortbay.jetty.webapp.parentLoaderPriority</key>
        <value>true</value>
      </systemProperty>
    </systemProperties>
 </configuration>
java.lang.ClassCastException: com.sun.mail.handlers.multipart_mixed cannot be cast to javax.activation.DataContentHandle

java.lang.ClassCastException: com.sun.mail.handlers.multipart_mixed cannot be cast to javax.activation.DataContentHandle


By : Adi Pasho
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Whenever a subclass apparently can't be typecasted to its legitimate superclass, you have duplicate classes, loaded by different classloaders. Find where you load the activation (superclass) classes, eliminate all but one (typically you'll need to eliminate the one class that your own project brings) and use the provided one from the framework.
The Exception message names the classes in question but omits the classloaders participating in the game, which is why the message, on first attempt to understand it, doesn't make much sense. As soon as you know about multiple classloaders, thus multiple instances of javax.activation.DataContentHandler, it makes more sense.
Java mail with attachment: ClassCastException on javax.mail.Multipart

Java mail with attachment: ClassCastException on javax.mail.Multipart


By : Satya
Date : March 29 2020, 07:55 AM
To fix this issue I had the same problem with the JavaMail 1.5.1 and OSGi. Using msg.getContent() always returned an InputStream when called from an OSGi bundle while it works perfectly when called from a simple Java test program.
Setting the default CommandMap didn't work for me, but I found a solution here:
Related Posts Related Posts :
  • Why is it mandatory for ternary operations to return a value?
  • How can I make my listview rows different heights
  • Array declaration trick : Is it bad to use it?
  • Calling different classes with if else statements
  • Free API for speech recognition system
  • Java: Objects in JFrame are messed up
  • Is there a similar of MessageBox of ExtJS in ADF Faces
  • Passing HttpServletResponse in Spring Boot controller method
  • Failed to load libraries: [netty_tcnative_linux_arm_32, netty_tcnative_linux_arm_32_fedora, netty_tcnative_arm_32, netty
  • How to build a small documents storage?
  • Getting pixel position of a text in an image
  • How do I get a list of Methods called from a Class in Eclipse IDE?
  • Convert string to day of week (not exact date)
  • Unable to understand how rounding is working for decimal digits (Java)
  • How to avoid java.lang.NoSuchMethodError: org.apache.poi.util.IOUtils.copy(Ljava/io/InputStream;Ljava/io/OutputStream;)
  • JTable Renderer not working with RowSorter?
  • From java.util.concurrent.Future<T> to play.libs.F.Promise<T>: How to do that in Java?
  • jUnit tests work in Eclipse, but fail in ant - java.lang.RuntimeException: Stub
  • How do i add a tooltip to existing gwt Textbox?
  • actor replying to non-actor
  • Google Cloud Messaging - server connection
  • Which classes are unmodifiable and cannot be intrumented and is there a way to bypass it?
  • Java & Jersey 1.17: Custom default response headers
  • Java rounding error
  • Setting custom RejectedExecutionHandler for ThreadPoolExecutor after executing some tasks?
  • Arquillian test class variables lose value
  • java.util.ConcurrentModificationException while inserting in ArrayList
  • How to write generic Java API without method Overloading
  • Java Serialization / Deserialization of an ArrayList works only on first program execution
  • Conway's Game of Life's rules dont apply properly
  • call a java method when Click on a html button without using javascript
  • Why does SSLSocketFactory.createSocket returns a Socket instead of SSLSocket?
  • How to schedule a task in Tomcat
  • compare two pdf files (approach) using java
  • What is the use of allowCoreThreadTimeout( ) in ThreadPoolExecutor?
  • Describe the Strategy Design Pattern in Java?
  • MongoDB too many open connections
  • Issue with generate JAXB classes with value constructors
  • Moving from one frame to another in java swing
  • Get a thread by Id
  • how to open front camera and back camera at same time?
  • Messed up with Java Declaration
  • Extracting chart in EXcel as image using java
  • How to get latitude and longitude in Android phone?
  • Do GC pauses and kill -STOP produce the same behavior?
  • Android HTML.ImageGetter Images resized
  • The way to instantiate map<String, List<String>> in Java
  • Java Making objects move while buttons held
  • Androidx Navigation View - `setNavigationItemSelectedListener` Doesn't Work
  • after compiling code JFrame does not appear
  • Netbeans project, JFrames ran from the main JFrame close all JFrames in project
  • Square Retrofit Client: How to enable/disable followRedirects? How to intercept redirect URL?
  • Java Circular Reference - Can’t Compile
  • Mouse click on specific time JAVA
  • android 4 onCreateDialog return type incompatible when overriding
  • Java Implementation of Oracle's DBMS_UTILITY.GET_HASH_VALUE Function
  • javac cannot be run, and furthermore does not seem installed
  • Function to obtain a thread given its ID
  • Java File path to Executable has spaces
  • Minimum Oracle Java VM heap memory setting?
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org