I'm trying to use NetBeans IDE to program java on my XP machine. However after I compile something and execute it I always get this error: (java.lang.NoClassDefFoundError:). I was wondering why this is? I've compiled and executed them correctly on my schools server but not here at home?

What does this mean?

//This is a connectionmanager.//And i want to read data from DbInfo.properties//How ever "InputStream in " is always showing null to me.//What should i do?package com.bulletin.jdbc;import java.sql.*;import java.util.Properties;import java.io.FileInputStream;import java.io.*;public class ...

Hi,I am wirting a code in which an exception is thrown, I catch this exception in the catch block, but when I display e.getMessage() it displays null.....Can any body help in telling why....ThanksRajnish Verma

After declaring the icon w/ : ImageIcon icon = new ImageIcon("logo2.gif");and the JPanel is added to the content pane, the error I am recieving is w/ this peice of code:jPanel1.add(icon);The error is: cannot reslove symbol, jPanel1.add(icon);^I'm nit sure what the deal ...

Hi,how can I tell javadoc to create a new line? I want the following documentation to be divided in many lines in the way I wrote it, but I don't know hoe to do it./** * This provides methods to manipulate ASN objects. * An ASN object has the following format: * Identifier, * Length of the ...

Anytime I go to a website that requires a java plug-in I get this message "Java plug-in 1.4.2 is not installed properly" Then it will say "Jre collision" where the java should be. When I click on Java Plug-in, in the control panel it tells me that "The system cannot find the registry key ...

Hello. In my applications I usually have a try catch(Throwable) block surrounding all the top code (the code in main()) to log and report errors and exceptions that is not caught anywhere else, and to have my application exit in a controlled way. But I recently noticed that exceptions thrown in ...

Hi,i become the following Exception, when i compile with JBuilder, cansomeone describe me, what the Problem is ?An exception has occurred in the compiler (1.4.1). Please file a bug at the Java Developer Connection ( http://java.sun.com/cgi-bin/bugreport.cgi) after checking the Bug Parade for ...

Hello Everyone...I keep getting this warning message when I generate my Javadoc...Class org.apache.regexp.RE not found in import.It happens with apache and javax classes. Does anyone know how can this be fixed?

I open a connection to a URL, try to get the content type, and get a MalformedURLException. It appears to me that the sun.net followRedirect function reallydoesn't like the location: (redirect) field in the HTTP: header.The location field returned by the server is:location: ...

I am having trouble installing JAVA. It gives me this error: "Error 1311.Source file not found C:\Downloads\JAVA\try\sd142000.cad. Verify that the file exists and that you can access it."Do you know how to fix the problem?

guys- this is an assignment for school and i bet there is something that u may consider soooo stupid but i am a beginner and i really dont know how to proceed....i have installed tomcat 5.0.12 on my windows xp.my java is 2se .i have created several serlet pages. in one of them i am suppose to ...

I was trying to install some software on my computer with a CD. About half way through the installation I get the following error message:javaw.exe has encountered a problem & needs to closeThen it closes and that is the end of the installation. Any ideas what is causing this problem? This ...

Hello all;I am getting a rather interesting ClassCastException fior DataSource tied to a SQl Server connection. I am using the Opti driver, and setting up the connection using the *-ds.xml style settup file. Also, am running ver 3.2.1 of Jboss with Tomcat, compiled and ran on the 1.4. jdk/VM. ...

I am developing an application that transfer files amoung peers, client/server , using socket. The requerement for the project is to send request to other peer using xml file. Several things are happening that's driving me crazy. Here are the scenerios:1. When I connect to my own peer (setup ...

Hello,I have two packages in two seperate directories - enc and util. Its like this:Class#1: (in dir 'enc') myTest.java--package com.xmlsec.enc;// some import statements...import com.xmlsec.util.XMLUtility;public class myTest(){... XMLUtility myObj = new XMLUtility(...);...}Class#2: (in dir ...

Exception in thread "main" java.lang.NoClassDefFoundError: Testpublic class Test{ public static void main(String[] args){System.out.println("Test");}}the program compiles properly, but when I try to run it it tells me:Exception in thread "main" java.lang.NoClassDefFoundError: Testcan anyone ...

I launch the Javadoc tool with:javadoc -sourcepath ..\src\ -d %DIR_JAVADOCS% -author -package -use -version %SOURCES% -classpath %CP%(where the %XXX% are environment variables properly set).The problem is that the packages frame and overview frame doesnt appear in the resultant index.htmlAlso, ...

Hi..can anyone help me to understand this error..i hava a character variable delared in my program like thischar grade ;I have some if statement that go something like thisif(avgmark >= 70)grade = 'A' ;if(avgmark >= 60 && avgmark < 70)grade = 'B';When I try to prrint what ...

The link below talks about the Sun Package List Utility, but could someone tell me where to find the utility jar/classes that are refererred to here ... (docutil.PackageList et. al.) http://java.sun.com/j2se/javadoc/doccheck/docs/PackageList.htmlI got to this page from the 'Sun Doc Check ...

Hi there,I have a Class A that creates an instance of Class B in method mA().At compile time, Class A and B are both included in the CLASSPATH.However, at runtime, Class B is removed from the CLASSPATH resulting in a NoClassDefError as expected.NOTE: How do I gracefully handle a condition ...

After installing the JSDK package to run java servlets is there anything else you need to install?I keep getting the following errors when I try to compile my IsItWorking.java script:www/servlets> javac IsItWorking.javaIsItWorking.java:57: package javax.servlet does not existimport ...

Is it possible to supply a jar file for the javadoc sourcepath argument? My attempts with this result in no source files found (jdk 1.4.2). I'm trying to exercise a custom doclet programmatically without having to explode the source first. Thanks.

Hello every1.....can any body plz help me out ...when does the below exception arise and how do we get rid of it" ****** IllegalMonitorStateException **** "plz..............

Hi,I have a method called methodOne that throws ExceptionXXX, and another method called methodTwo that uses methodOne and also throws ExceptionXXX.public static methodOne() throws ExceptionXXX{...}Does methodTwo need to use try/catch to catch ExceptionXXX from methodOne, ( like the following ...

Hello all,I'm new to javadoc and trying to format my classes sames as thesdk doc. The problem is that in the sdk doc on top of the pagethe tree shows the classes with package names, and in theparameter lists etc. the package names, e.g. for "String",are not shown. How can I do this? I want to ...

I'd like to print all generated doc-files under windows (which is 324 files in 32 folders).I would find a way in linux like "find ./ -name *.html -exec lpr {} \;" but how may I do this with windows 2000?No - I dont't have this MIF - Framework.

I am using Sun One Studio 4 update 1, Community Edition. I have been trying to write this Account application, but I have been constantly getting this error:C:/Program Files/s1studio/ce/lib/ext/jdbc20x.zip(javax/sql/DataSource.java) [32:1] class DataSource is public, should be declared in a ...

I have a class with javadoc comments at the class, field, and method levels. Class and method comments are generated fine, but not field. Right after the class declaration I have a comment, then I declare a variable. Not sure what the problem is. For example:public class someClass {/*** ...

Hi All,Here is my code to assign accelerator key to a menu item, so that when I press Control+Left Arrow key, action associated with leftArrow menu item get executed. And this works perfectly fine.JMenuItem leftArrow = new ...

I don't know which is a good way from catch a exception and throw a exception, I means that how to use exception in java,catch ? throw?

Can anyone post a reply with a simple program to find the prime numbers in a range given by the user?

i write the same progran burt at the text field but also i have an error in container:import javax.swing.*;import java.awt.event.*;import java.awt.*;public class ch6_14_2{JLabel l1=new JLabel("Enter the Base");JTextField b=new JTextField(10);JLabel l2=new JLabel("Enter the ...

I tried to compile and run "MathOps.java (from Eckel=C03) and I get the following 3 errors:C:\java>javac -cp . MathOps.javaMathOps.java:5: package com.bruceeckel.simpletest does not existimport com.bruceeckel.simpletest.*;^MathOps.java:9: cannot resolve symbolsymbol: class Testlocation: ...

hello, i would appreciate if you could help me.i am writing an application, the classes all belong to "kezilabda" (handball in hungarian).all *.java files are in directory c:\j2sdk1.4.2_02\myprogs\kezilabda. Kezilabda.java is the source for the main class of the application. i am trying to use ...

Hi,I'm using Windows and my program doesn't work at home but it works at my lab (my lab is using linux).There's my error:Banque.java:35: cannot resolve symbolsymbol : variable Keyboardlocation : class Banquechoix = Keyboard.readChar();I know that my code is ok, I think that's a problem of ...

Hello,I'm curious why my java console is not displaying when i click on it?Internet Explorer: View: Java Consoleand it doesn't workdoes anyone know why this maybe?Thank you...

I am a student and only just started programming in Java. When I installed the SDK on my home computer i discovered that everytime i try and run a program i have written, no matter how basic, i get a "java.lang.NoClassDefFoundError". I did a search on the forum and found lots of stuff about ...

Hi everybody,Im getting the following exception when I try to run the code below:java.lang.NullPointerExceptionat LoginAction.checkLogin(LoginAction.java:16)at ConnMysql.main(ConnMysql.java:22)public class ConnMysql {public static void main(String[] args) {boolean status = false; try ...

Im writing thesis and need help. I finished 3 pretty big apllets. On my computer everything works fine, but when i showed it to my promoter on university applets didnt start :(. There was a message on bootom of IE "applet not initialized". Im using Java for about 3 months so im noob. Now my ...

addRecord(java.lang.String,java.lang.String) in CatDriver cannot be applied to (java.lang.String,int) addRecord(correctName, correctAge);

Hello all,I'm trying to auto install Java Advanced Imaging on a mac osx using a raw installation manifest jar file. Now when I run the html page with my <applet> tag it gives me this error:java.lang.ExceptionInInitializerError: java.security.AccessControlException: access denied ...

I have been writing small java utilities and aplications for school for 3 months now. This week I undertook the task of writing my first professioanl applet. The problem is that I need the applet call to be written dynamically by a cgi app. My cgi app is written in basic. I have had enormous ...

Environment: --Eclipse 2.0, j2sdk142, jakarta-struts-1.1, -I think I've correctly added all jars to Java/Build path/LibrariesWEB-INF/lib (Contains)-commons-beanutils.jarcommons-collections.jarcommons-digester.jarcommons-logging.jarjstl.jarstandard.jarstruts.jarstruts-el.jarWEB-INF ...

can someone please help!! why is it i get an error message if password class has an overloaded costructor when trying to extend password class with Account class this doesnt happen if the default constructor is used (only problem is I'm not allowed to change password class) error says cannot ...

Hi atmguyI follow what you are saying(I think) Below is the full Account constructor but still get same error msgcannot resolve symbol - constructor Password() public Account(String n, String p, String d, String t, String a){String strL = "rt"; //**just inserted String strA = "is"; //**just ...

Error: Super class "<gen>" is not accessible: it is not in the same packageand not public. Please help, what should I do?

Hi, I get the following error when i try to prefix header data to an already existing file.'xref subsection not found at file pointer 176'.Pls let me know what might be causing the 'xref' error.regardsnr

Okay can someone tell me whats wrong with this code because it can't be viewed in an applet and comes up as 'applet not initialized', however it compiles fine. The code draws a bar chart graph using an array as a data store.import java.awt.*;import java.applet.*;import ...