NoClassDefFoundError, what is wrong?

I complied a very simple java app in the dos command line:
public class Welcome
public static void main(String[] args)
System.out.println("Welcom");
but once I run it, I get an error: NoClassDefFoundError. What's wrong?
Thanks

You have to compile it first.
If you have already compiled in, make sure your CLASSPATH variable includes .
so, something like, CLASSPATH=.;c:\myclasses;c:\yourclasses

Similar Messages

[b]Does anybody know what is wrong with my code[/b]

I cannot see what is wrong with this code but i can't get it to compile. when i try to compile it i get the
"Exception in thread "main" java.lang.NoClassDefFoundError:
Is this a problem with compiling or is it a code error?
Here is my code
public class IntCalc{
     int value;
     public IntCalc(){
          value = 0;
     public void add(int number)     {
          value = value + number;
     public void subtract(int number){
          value = value - number;
     public int getValue()     {
          return value;
Message was edited by:
SHIFTER

Youd don't have a class file. Compile it first then run it. If your compiler isnt making the .class file tell me and ill give you a link to a realy good java compiler.

What is wrong with my Eclipse??

Dear Sir:
I have following problem in Eclipse 3.3.1
When i run in Command console, It success all,
But when I put into Eclipse, It fails, I got follwoing error:
ERROR>java version "1.6.0"
ERROR>Java(TM) SE Runtime Environment (build 1.6.0-b105)
ERROR>Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode)
<GoodWinRedirect>ExitValue: 0
ERROR>java.lang.NoClassDefFoundError: abc/LabelForComboBox
ERROR>Exception in thread "main"
What is wrong in my Eclipse Setting??
How to fix it??
Really Thanks
see code below:
[1]. Main Program
import java.util.*;
import java.io.*;
public class GoodWinRedirect
    public static void main(String args[])
        if (args.length < 1)
            System.out.println("USAGE java GoodWinRedirect <outputfile>");
            System.exit(1);
        try
            FileOutputStream fos = new FileOutputStream(args[0]);
            Runtime rt = Runtime.getRuntime();
            Process proc = rt.exec("java -version");
            Process proc1 = rt.exec("cmd /c java abc/LabelForComboBox");
            // any error message?
            StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");
            StreamGobbler errorGobbler1 = new StreamGobbler(proc1.getErrorStream(), "ERROR");
            // any output?
            StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT", fos);
            StreamGobbler outputGobbler1 = new StreamGobbler(proc1.getInputStream(), "OUTPUT", fos);
            // kick them off
            errorGobbler.start();
            outputGobbler.start();
            errorGobbler1.start();
            outputGobbler1.start();
              // any error???
            int exitVal = proc.waitFor();
            System.out.println("<GoodWinRedirect>ExitValue: " + exitVal);
            fos.flush();
            fos.close();
        } catch (Throwable t)
            t.printStackTrace();
}[2]. Sub 1 Program:
package abc;
import java.util.*;
import java.io.*;
class StreamGobbler extends Thread
    InputStream is;
    String type;
    OutputStream os;
    StreamGobbler(InputStream is, String type)
        this(is, type, null);
    StreamGobbler(InputStream is, String type, OutputStream redirect)
        this.is = is;
        this.type = type;
        this.os = redirect;
    public void run()
        try
            PrintWriter pw = null;
            if (os != null)
                pw = new PrintWriter(os);
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line=null;
            while ( (line = br.readLine()) != null)
                if (pw != null)
                    pw.println(line);
                System.out.println(type + ">" + line);
            if (pw != null)
                pw.flush();
        } catch (IOException ioe)
            ioe.printStackTrace();
}[3]. sub 2:
package abc;
import java.awt.Dimension;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.Box;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class LabelForComboBox extends JPanel {
public LabelForComboBox() {
    JLabel lbl = new JLabel("Color:");
    lbl.setDisplayedMnemonic('c');
    add(lbl);
    add(Box.createHorizontalStrut(20));
    JComboBox cbColor = new JComboBox();
    cbColor.addItem("red");
    cbColor.addItem("blue");
    lbl.setLabelFor(cbColor);
    add(cbColor);
public static void main(String[] a) {
    JFrame f = new JFrame("LabelForComboBox");
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
    f.getContentPane().add(new LabelForComboBox());
    f.pack();
    f.setSize(new Dimension(300, 200));
    f.show();
}

Yes, I did this before and now, but fails, see:ERROR>java version "1.6.0"
ERROR>Java(TM) SE Runtime Environment (build 1.6.0-b105)
ERROR>Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode)
<GoodWinRedirect>ExitValue: 0
ERROR>java.lang.NoClassDefFoundError: abc/LabelForComboBox
ERROR>Exception in thread "main"
looks weird.
>
You haven't changed it, OR
You have pasted the old error message (unhelpful).
Try again and paste the new error message. If the error reads as follows (note the / character after "abc") you have NOT changed the code to fix the class name:
ERROR>java.lang.NoClassDefFoundError: abc/LabelForComboBox
The class name used must be abc.LabelForComboBox because abc/LabelForComboBox cannot work.

What's wrong with my XPath statement using dom4j?

I'm pretty new to XML. However, I did pick up a book and I'm pretty much through it. I got a copy of dom4j and I created a sample XML file. I'm able to parse the data and find out the child elements of root but I'm having problems with using XPath no matter what I do. Here's my code:
import org.dom4j.*;
import org.dom4j.io.*;
import java.util.*;
import java.io.*;
public class XMLACL {
org.dom4j.Document doc;
org.dom4j.Element root;
XMLACL(String x) {
    String tempFile = System.getProperty("user.dir") + "/winsudo.xml";
    tempFile = tempFile.replace('\\', '/');
    SAXReader xmlReader = new SAXReader();
    try {
      doc = xmlReader.read(tempFile);
    catch (Exception e) {}
    root = doc.getRootElement();
    //treeWalk();
    //iterateRootChildren("grant");
    XPath xpathSelector = DocumentHelper.createXPath("/grant[@prompt='no']");
    List results = xpathSelector.selectNodes(doc);
    for (Iterator iter = results.iterator(); iter.hasNext(); ) {
     Element element = (Element) iter.next();
      System.out.println(element.getName());
}And here's my XML:
<?xml version="1.0" encoding="UTF-8"?>
<config>
     <alias name="admin">
          <user>geneanthony</user>
          <user>mike</user>
          <user>rob</user>
     </alias>
     <grant prompt="no" runas="root" service="no">
          <user>geneanthony</user>
          <command>!ALL</command>
     </grant>
     <grant>
          <user>geneanthony</user>
          <group>users</group>
          <command>C:/Program Files/Mozilla Firefox/firefox.exe</command>
     </grant>
     <grant>
          <alias>admin</alias>
          <command>!Panels</command>
     </grant>
</config>I'm currently getting this error:
C:\Borland\JBuilder2005\jdk1.4\bin\javaw -classpath "C:\code\java\WinSudo\classes;C:\Borland\JBuilder2005\jdk1.4\jre\javaws\javaws.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\charsets.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\dnsns.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\ldapsec.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\localedata.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\sunjce_provider.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\im\indicim.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\im\thaiim.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\jce.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\jsse.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\plugin.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\rt.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\sunrsasign.jar;C:\Borland\JBuilder2005\jdk1.4\lib\dt.jar;C:\Borland\JBuilder2005\jdk1.4\lib\htmlconverter.jar;C:\Borland\JBuilder2005\jdk1.4\lib\tools.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\jRegistryKey.jar;C:\Borland\JBuilder2005\jdk1.4\lib\hsqldb.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\dom4j-1.6.1.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\syntax.jar;C:\Borland\JBuilder2005\jdk1.4\jre\lib\IzPack-install-3.7.2.jar" winsudo.Main
java.lang.NoClassDefFoundError: org/jaxen/JaxenException
     at org.dom4j.DocumentFactory.createXPath(DocumentFactory.java:230)
     at org.dom4j.DocumentHelper.createXPath(DocumentHelper.java:121)
     at winsudo.XMLACL.<init>(XMLACL.java:26)
     at winsudo.Main.main(Main.java:15)
Exception in thread "main"
Can someone tell me what's wrong with my code. None of the samples I've seen came with the XML files so I don't know if I when I start the XPATH I need to use / for the root element, or // or a forward slash and the root name. Can I please get some help!

Thank you! I didn't haven Jaxen I thought everything was in the package and I must have missed it in the tutorials. That resolved the dropouts and I think I'm good know. I couldn't think for the life of me what I was doing wrong!

What went wrong ?

Dear all,
I`m trying to figure out what went wrong with my database.
During the higher load the users were suddenly getting DBIF_RSQL_SQL_ERROR, no matter what they wanted to do. When checking system I found many messages like:
Database error -1000 at OPC access to table REPOLOAD
> POS(1) Too many lock requests
> Include ??? line 0000.
Run-time error "DBIF_REPO_SQL_ERROR" occurred
Run-time error "DBIF_RSQL_SQL_ERROR" occurred
Database error -1000 at OPC
> POS(1) Too many lock requests
Database error -1000 at OPC
> POS(1) Too many lock requests
Database error -1000 at OPC
> POS(1) Too many lock requests
Database error -1000 at EXE
> POS(1) Too many lock requests
According to documentation I found error -1000:
1000: Too many lock requests
Explanation
There are too many locks or lock requests.
User Request
You can try to repeat the SQL statement at a later time or cancel the transaction. If this situation occurs frequently, then the MAXLOCKS general database parameter is too small and should be increased
Database kernel showed following messages:
2009-12-07 16:04:18 8126 ERR     5 Catalog Catalog update failed,IFR_ERROR=-1000,DESCRIPTION=UNDEFINED
2009-12-07 16:05:13 8170 ERR     5 Catalog Catalog update failed,IFR_ERROR=-1000,DESCRIPTION=UNDEFINED
2009-12-07 16:10:13 8182 ERR     5 Catalog Catalog update failed,IFR_ERROR=-1000,DESCRIPTION=UNDEFINED
2009-12-07 16:15:09 8229 ERR     5 Catalog Catalog update failed,IFR_ERROR=-1000,DESCRIPTION=UNDEFINED
2009-12-07 16:15:13 8123 ERR     5 Catalog Catalog update failed,IFR_ERROR=-1000,DESCRIPTION=UNDEFINED
So do you think it is just about MAXLOCKS parameter or also with catalog cache sizing could be wrong ?
Version : MaxDB 7.6.6.7.
Thank you for your comments.
Pavol

> Database error -1000 at OPC
> > POS(1) Too many lock requests
> 1000: Too many lock requests
> Explanation
> There are too many locks or lock requests.
> 2009-12-07 16:04:18 8126 ERR     5 Catalog Catalog update failed,IFR_ERROR=-1000,DESCRIPTION=UNDEFINED
> So do you think it is just about MAXLOCKS parameter or also with catalog cache sizing could be wrong ?
> Version : MaxDB 7.6.6.7.
Hi there,
it's really just about the MAXLOCKS setting.
As you seem the "Catalog update failure"-message also points out error no. -1000.
It's the same "too many lock requests" error as before.
Having a MAXLOCKS value of 1.000.000 or even 3.000.000 is not unusual with MaxDB!
regards,
Lars

My 10.8.3 update did not install properly citing an 'Unknown Error'. Now, my Mail and Mac App Store aren't working. What went wrong and how do i fix it ?

My 10.8.3 update did not install properly citing an 'Unknown Error'. Now, my Mail and Mac App Store aren't working. What went wrong and how do i fix it ?

I tried this and still have the same problems. If I open Address book or the Mac App Store I get the library rebuild popup and a hang. I created a fresh user and then things are better apart from the printing issue. Its clearly some 3rd party software issue but the crash logs are meningless to me. I used the excellent Etre check app from http://www.etresoft.com/etrecheck so I have a list of what is being loaded and can compare clean and crashed user info but as I cant work out which of the startup items, launch agents, launch daemons etc that are causing the problem.
I have eliminated Dropbox, Mac Keeper and Witness, and it isnt related to my exterrnal LED cinema dispay or my external thunderbolt drives, or any USB devices if thats any help to anyone else. Info from Etrecheck follows -
Kernel Extensions:
          com.oxsemi.driver.OxsemiDeviceType00          Version: 1.28.7
          com.rogueamoeba.InstantOn          Version: 6.0.2
          com.rogueamoeba.InstantOnCore          Version: 6.0.2
          com.Cycling74.driver.Soundflower          Version: 1.5.3
Problem System Launch Daemons:
Problem System Launch Agents:
Launch Daemons:
             [not loaded] com.adobe.fpsaud.plist
             [not loaded] com.adobe.SwitchBoard.plist
             [not loaded] com.bombich.ccc.plist
             [not loaded] com.dymo.pnpd.plist
             [not loaded] com.intego.BackupManagerPro.daemon.plist
             [not loaded] com.micromat.TechToolProDaemon.plist
             [not loaded] com.microsoft.office.licensing.helper.plist
             [not loaded] com.orbicule.witnessd.plist
             [not loaded] com.sierrawireless.SwitchTool.plist
             [not loaded] com.stclairsoft.AppTamerAgent.plist
             [not loaded] org.macosforge.xquartz.privileged_startx.plist
             [not loaded]          pcloudd.plist
Launch Agents:
                 [loaded] com.divx.dms.agent.plist
                 [loaded] com.divx.update.agent.plist
                 [loaded] com.epson.epw.agent.plist
                 [loaded] com.lacie.raidmonitor.daemon.plist
                 [loaded] com.lacie.safemanager.daemon.plist
                 [loaded] com.micromat.TechToolProAgent.plist
                 [loaded] com.orbicule.WitnessUserAgent.plist
                 [loaded] org.macosforge.xquartz.startx.plist
User Launch Agents:
             [not loaded]          .DS_Store
                 [loaded] com.adobe.AAM.Updater-1.0.plist
                 [loaded] com.adobe.ARM.202f4087f2bbde52e3ac2df389f53a4f123223c9cc56a8fd83a6f7ae.plist
                 [loaded] com.digitalrebellion.SoftwareUpdateAutoCheck.plist
                 [loaded] com.divx.agent.postinstall.plist
                 [loaded] com.google.keystone.agent.plist
                 [loaded] com.propaganda.dejavu.dvmonitor.plist
                 [loaded] com.valvesoftware.steamclean.plist
                 [loaded] com.zeobit.MacKeeper.Helper.plist
User Login Items:
          iTunesHelper
          Synergy
          TomTomHOMERunner
          Dropbox
3rd Party Preference Panes:
          Déjà Vu
          Flash Player
          Flip4Mac WMV
          GR-55
          Paragon NTFS for Mac ® OS X
          Perian
          Printopia
          TechTool Protection
          Witness

I can no longer import pictures to my ibook (OSX version 10.6.8) using iphoto 09 version 8.1.2 and now get message that file is in an unrecognizable format. What is wrong? Same camera as before.

I can no longer import pictures to my ibook (OSX version 10.6.8) using iphoto 09 version 8.1.2 and now get message that file is in an unrecognizable format. What is wrong? Same camera as before.

Julesvernet
As a Test:
Hold down the option (or alt) key and launch iPhoto. From the resulting menu select 'Create Library'
Import a few pics into this new, blank library. Is the Problem repeated there?

Ipod touch 1st gen is frozen, all I see is Apple logo for 10 secs and then screen goes black. What's wrong with it?

My ipod touch (1st gen) is frozen and does not respond. All I can see is the Apple logo for around 10 seconds and then screen returns to black. What is wrong?

Did you already try to connect in recovery mode and restore? iPhone and iPod touch: Unable to restore

My ipod nano 5th gen is still making the clicking noise but won't play music and the screen is black what's wrong?!my ipod nano 5th gen is still making the clicking noise but won't play music and the screen is black what's wrong?!

my ipod nano 5th gen is still making the clicking noise but won't play music and the screen is black what's wrong?!

Downloading past purchases from the App Store, iBookstore, and iTunes Storehttp://support.apple.com/kb/HT2519
Message was edited by: michael08081

Snow Leopard Samsung ML-1630 Crashes entire system - what's wrong?

The printer will print, but the entire system crashes and the Mac Mini reboots each time a print job is sent. The forum points out a lot of problems with printers and the Snow Leopard upgrade, but no real help seems to have been offered.
I did download the new Samsung drivers recommended for snow leopard using the Apple link
I have removed and reinstalled the printer, several times
What's wrong? Did Apple test this before they launched the new software?
I bought the printer from an Apple store, I hope they support it still.

I agree with William on this. I use the same printer with just native OSx support.
There is one possible issue. The power that the printer draws when printing is pretty significant. My UPS (AVR) kicks in every time I print there. I do have many devices on this circuit though.
It is possible that your voltage is being pulled so low that your machine is rebooting.
If possible try the printer on a different circuit or turn off as much as possible equipment on the same circuit and give it a try.

Installed the update tonight and now my phone (Lumia 928) won't power up. I've tried a soft reset, but the screen goes from the Nokia logo to a red Verizon screen to a black screen. What's wrong and how do I fix it? Help!

Installed the update tonight and now my phone (Lumia 928) won't power up. I've tried a soft reset, but the screen goes from the Nokia logo to a red Verizon screen to a black screen. Tried it 10 times with the same result. What's wrong and how do I fix it? Help!

Oh no Mr.Ected!
I can see if we can get your phone back on! I understand how important it is to have a phone. Have you tried this to see if we can get it back on? http://vz.to/1DZhteH . If it is still goes to a red Verizon screen and then to black we might need to do a master reset. While the phone is off try this:http://vz.to/1DZhXkU Be mindful this is the last resort because it will erase everything on the phone. If you have done back up assistant in the past you will be able to get you contacts back. Please let me know if you need any more help.
AmberF_VZW
Follow us on Twitter @VZWSupport

Recently loaded Lion on my laptop and now my computer crashes often. Black screen and keyboard lights up. Any ideas on what's wrong and how to fix this?

Recently loaded Lion on my laptop and now my computer crashes often. Black screen and keyboard lights up. Any ideas on what's wrong and how to fix this?

Everytime this happens Ihave to power down and restart! Any ideas would be appreciated!

What's wrong with my browsers?

When i first got my macbook the internet was going really slow but then i changed the dns server to 4.2.2.2 and sometimes change it to 4.2.2.1 and the internet got better but now my browsers are acting funny.
One moment i'm surfing webpages with safari or firefox.... Chatting with AdiumX or MS Messenger... and suddenly it just stops... Msn is getting time-out's, Safari says I'm not connected.
But Airport sais it is still connected to my wireless network (with all the black bar's filled). It has valid IP adress etc, But everywhere I want to go on the internet it sais I'm not connected.
When I disconnect the airport en let it reconnect with my wireless network, the connection is fine.
how can i fix this?

Most users shouldn't be manually entering DNS addresses, and those DNS addresses you mention probably aren't intended for end users. Is Level3 your ISP?
That doesn't answer 'what's wrong with my browsers?', but a good start would be to configure your network according to your ISP's instructions. If you have DNS problems then, you might try using OpenDNS.

What's wrong with my iPhone

Okay so I was at my home screen (unlocked) and I was gunna use Siri because I always talk to him so anyways I holded the home button to activate him and he made the beep noice to tell you that has been activated then suddenly my iPhone just immedientlu switched off I was trying to switch it back on but it didn't work also my battery didn't die I had it on charge before hand so I plugged it ino my wall charger and the apple logo came on but its going on for 3 seconds then a black screen for 3 seconds continuous some forums say it is bricked but my iPhone isn't jail broken my computer is broke so I haven't been able to use a computer some forums say to restore it but I don't want to because I'm really far on clash of clans which will go if I restore my iPhone is a IPhone 5C IOS 7 the highest one. I wasnt updating anything so If I was it was running in background I got my phone for my birthday 7 December 2013 please tell me what is wrong and now to fix it my parents will go crazy

mason68 wrote:
Okay, I cannot get to the home screen therefore I will have to comprehend a force reset. Now I will lose all my game activity D:
In the worst case scenario, your choices may be:
A; Keep your game activity on an iPhone that you can't access.
B; Get your iPhone to a status that it can be used.
We haven't come that far yet, so lets see what these steps can accomplish.

What's wrong with networking since Leopard?

Hi,
I'm with Mac since years. I was a PC User once and spent hours with all kinds of network troubles. What convinced me with Mac right in the beginning was easy networking: It just worked!
But since Leopard things got worse: I have several MBP's, iMacs, Airport Extreme's and Airport Express's at different places which I installed, and I face the same problems at EVERY place:
- I can't connect to AExtreme for several reasons: timeout, security incompatibility, ...
- Sometimes only two Macs are allowed to connect to one AExtreme
- Airport doesn't find Aiport or any other networks for minutes
- After connecting to the router, can't get an IP (self-assigned IP only) - other PCs get an IP.
- Aiport Extreme crashes (yellow blinking)
- connection loss (even when AExtreme is very close)
Now I know about networking, about configuration, I've done this for years. Whatever I do, problems disappear and appear again, at different times, at different places with different hardware.
What is wrong with Leopard? Such problems remind me of times with Windows98 and stuff like that.

What's wrong with networking since Leopard?
on my network and many i have setup there have been no problems with leopard. However there are always teething problems with new operating systems. Thankfully with leopard only a tiny percentage of users experience technical difficulties.
can't connect to AExtreme for several reasons: timeout, security incompatibility,
is it set to use WPA/WPA2
Airport doesn't find Aiport or any other networks for minutes
sometimes my macbook pro takes a while to show up any networks if there are lots in the area this is because it is scanning them all.
After connecting to the router, can't get an IP (self-assigned IP only) - other PCs get an IP.
What kind of router are you using? What happens if you powercycle the router?
# Aiport Extreme crashes (yellow blinking)
# connection loss (even when AExtreme is very close)
Have you tried resetting your AE to default. reinstalling its firmware or checking for a firmware update?
Have you tried changing hte wireless channel your networ is broadcasting on?
What is wrong with Leopard? Such problems remind me of times with Windows98 and stuff like that.
Did you upgrade install your leopard installation or did you do clean (erase) installations?
Have you tried created new network locations?

NoClassDefFoundError, what is wrong?

Similar Messages

Maybe you are looking for