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Thread: java.lang.NoClassDefFoundError

  1. #1
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    Default java.lang.NoClassDefFoundError

    Imma new java user
    i don't know what's the problem on my code

    public class Main {
    	public void queueExample() {
     
    		Queue queue = new LinkedList();
     
    		queue.add("item1");
    		queue.add("item2");
    		queue.offer("item3");
    		queue.offer("item4");
     
    		System.out.println("remove: " + queue.remove());
    		System.out.println("element: " + queue.element());
    		System.out.println("poll: " + queue.poll());
    		System.out.println("peek: " + queue.peek());
    	}
     
    	public static void main (String [] args) {
    		new Main() queueExample();
    	}
    }

    and the output of this code is

    java.lang.NoClassDefFoundError: Main
    Exception in thread "main"
    Process completed.

  2. #2
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    Default Re: java.lang.NoClassDefFoundError

    I'm pretty sure you're just missing a period between Main() and queueExample(). Although I don't see how that would result in the Exception you're talking about.
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  3. The Following User Says Thank You to KevinWorkman For This Useful Post:

    anonymous001 (January 26th, 2011)

  4. #3
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    Default Re: java.lang.NoClassDefFoundError

    what about this one sir

    More error .

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    Default Re: java.lang.NoClassDefFoundError

    -Edit...Removed Post.
    anonymous001 corrected convention issue and started new Thread..which made my post void
    Last edited by newbie; January 26th, 2011 at 02:11 PM.
    Please use [highlight=Java]//code goes here...[/highlight] tags when posting your code

  6. The Following User Says Thank You to newbie For This Useful Post:

    anonymous001 (January 26th, 2011)

  7. #5
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    Default Re: java.lang.NoClassDefFoundError

    Quote Originally Posted by newbie View Post
    -Edit...Removed Post.
    anonymous001 corrected convention issue and started new Thread..which made my post void

     import java.util.LinkedList;
    import java.util.Queue;
     
    /**
    *
    * @author javadb.com
    */
    public class Main {
     
    /**
    * Example method for using a Queue
    */
    public void queueExample() {
     
    Queue queue = new LinkedList();
     
    //Using the add method to add items.
    //Should anything go wrong an exception will be thrown.
    queue.add("item1");
    queue.add("item2");
     
    //Using the offer method to add items.
    //Should anything go wrong it will just return false
    queue.offer("Item3");
    queue.offer("Item4");
     
    //Removing the first item from the queue.
    //If the queue is empty a java.util.NoSuchElementException will be thrown. 
    System.out.println("remove: " + queue.remove());
     
    //Checking what item is first in line without removing it
    //If the queue is empty a java.util.NoSuchElementException will be thrown. 
    System.out.println("element: " + queue.element());
     
    //Removing the first item from the queue.
    //If the queue is empty the method just returns false. 
    System.out.println("poll: " + queue.poll());
     
    //Checking what item is first in line without removing it
    //If the queue is empty a null value will be returned. 
    System.out.println("peek: " + queue.peek());
     
    }
     
     
    /**
    * @param args the command line arguments
    */
    public static void main(String[] args) {
    new Main().queueExample();
    }
    }

    i tried this code but it didn't run.

  8. #6
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    Default Re: java.lang.NoClassDefFoundError

    For the sake of everyone's sanity, I urge you to keep each problem in its own Thread. Please keep the issue with running your code in the Thread you started for it: More error .

    Full disclosure- I'm not a mod. Do what you want, but keep in mind that you should probably be making it easier for people to help you, not harder.
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  9. #7
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    Default Re: java.lang.NoClassDefFoundError

    Quote Originally Posted by KevinWorkman View Post
    For the sake of everyone's sanity, I urge you to keep each problem in its own Thread. Please keep the issue with running your code in the Thread you started for it: More error .

    Full disclosure- I'm not a mod. Do what you want, but keep in mind that you should probably be making it easier for people to help you, not harder.
    Sorry kev i accidentally clicked the submit :[
    okay. sorry sorry

  10. #8
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    Default Re: java.lang.NoClassDefFoundError

    i tried this code but it didn't run
    This is quite uninformative as to the problem...does it compile? Are there exceptions?

  11. #9
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    Default Re: java.lang.NoClassDefFoundError

    Ran unchanged for me. Please post how you are attempting to run your code, and any errors.

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