Code Compiles - Class Not Found Exception Interrupting Execution
Feb 13, 2015
So I'm learning java having been using c#. I based this code off an example from class. It compiles fine with no errors, but I'm getting this:
Which model do you want? + Standard,Electrum,CurveHilted, or Tonfa Standard
Exception in thread "main" java.lang.ClassNotFoundException: Standard
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
[Code] .....
How/where to point the correct class.
package com.company;
import com.sun.java.util.jar.pack.*;
import java.util.Scanner;
class LightSaberFactory {
static LightSaberFactory lsf;
ChooseLightSaberColor saberColor;
[Code] .....
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Aug 8, 2014
I am validating an xml file using XQuery in Java using XQJ API. When the query is triggered it is giving the ClassNotFoundException for orai18n.text.OraCollator. I have placed the orai18n-collation.jar file in MANIFEST.MF file and it is loaded in to the class path.
Not sure on why it is giving the exception.
The JDK i am using JDK1.7 and application server is weblogic.
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Aug 31, 2014
I have written a java applet. Few months before It was working all fine but my client has some other requirements now and I have to edit it. I am getting two problems:
1. I could not execute it on my local computer as it always gives "your security settings have blocked a local application from running". I have edited the settings from Control Panel but it is then started giving permission error on including permission in manifest file it started giving trusted library error and still it is not resolved.
2. Can I know how to work with third party library with applets. I have imported the library and uses its few classes but when I tried to load applet it always give no class definition found error. I have some ways mentioned online like use comma separated names for all the jars but no luck so far.
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Feb 17, 2014
So I am finishing up a GUI that randomly rolls a dice and shows you the dice face from a file that I have on my computer. It compiles fine, but when I open the GUI and press the button "Roll" it gives me errors and does not display the images.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import java.util.Random;
[code]....
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Mar 29, 2014
In fact, I'm not yet past that "Hello World" program.I'm following the steps in "Head First: Java" book, and reached that point where one is ready to write his/her 1st Java code. Here's mine:
public class MyFirstApp
{
public static void main (String[] args)
{
System.out.println("I Rule!");
System.out.println("The World!");
}
}
As simple as it should be, and compiles fine producing the correspondent class. But it doesn't run, however, and spits the following execution-time errors:
Exception in thread "main" java.lang.UnsupportedClassVersionError: MyFirstApp : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
[code]...
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Oct 21, 2014
Im trying to do this program but I keep getting Empty Stack Exception when I execute balancedBrackets. I know that push and pop methods works, but I'm not so sure if my logic for balancedBrackets is correct.
public void push(T t){
if(this.top+1==this.size){
duplicateCapacity();
}
else{
top++;
arr[top]=t;
[Code] .....
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Oct 16, 2014
My code runs and compiles just fine when I insert 3 values, however, if I add anymore values NOTHING happens. When I hit the compile button, my mouse pointer turns into that loading circle thing and after 3 seconds it disappears and nothing happens. No error or anything in the console, just BLANK. This problem occurs on line 12 in my main method, and my insert method is on line 41 in the third class..Here is my main method
public class TestAVLTree {
public static void main(String[] args) {
/*test at least 2 diff data types*/
//AVL of ints
AVLTree<Integer> avlInt = new AVLTree<Integer>();
avlInt.insert(100);
avlInt.insert(50);
avlInt.insert(200);
//avlInt.insert(3); fails here. could it be my insert method?
//avlInt.insert(17);
[code]....
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Jan 4, 2014
I would like to ask you how can i execute the next code without errors.
I am trying to execute a jar (myFile.jar) file multiple times with different inputs from another jar file. More simple i have game with many players and i create a Round Robin scheduling for the tournament, i need to execute all the mach's of a round together.
When i run the next code it execute on the first game with the first players multiple times.
Java Code:
public class RunJARFile {
//10 player
//5 game per round
public static void main(String[] args) throws IOException {
for (int Tour = 0; Tour < 9 ; Tour++) {
for (int Game = 0; Game < 5; Game++) {
[Code] ....
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Jul 14, 2014
i want to write a class in such a way that i should get the current execution time of another class which is running. I searched in net but it shows only how to calculate the time duration of the current class which is running. But as per my way, i need the execution time of one class from another class. How to do this ?
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Jul 15, 2014
I try to run this query select distinct TRIM(company) from catalog where company != '' order by company asc; and i get an SQL exception that Column company not found.. When i run this query in MySql workbench it works fine?
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Jun 7, 2013
I tried to develop a sample project with reference to : [URL] .....
When I try to run the client, I get the following error
javax.naming.NameNotFoundException: ejb: not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:771)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:779)
at org.jnp.server.NamingServer.getObject(NamingServer.java:785)
at org.jnp.server.NamingServer.lookup(NamingServer.java:396)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[Code] .....
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Apr 4, 2015
I mentioned the url-pattern in web.xml correctly and i also checked whether all the class files are present or not. But I am still getting ResourceNotFoundRException.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859
[Code] ....
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Nov 7, 2014
I've been trying for a while to get my exception output to print in a particular form to System.err.
What I'm looking for as output is
KeywordException: edu.cofc.csci221.KeywordException: **Keyword Not Found**
I'm getting
Keyword Exception: edu.cofc.csci221.KeywordException
at edu.cofc.csci221.CheckLine.checkForInvalidKeyword(CheckLine.java:101)
at edu.cofc.csci221.ReadLogFile.main(ReadLogFile.java:47)
The code:
line = scan.nextLine();
try { check.checkForInvalidSymbols(line); } catch (SymbolException sEx) { System.err.print("Symbol Exception: "); sEx.printStackTrace(); }
try { check.checkForInvalidKeyword(line); }catch (KeywordException kEx) { System.err.print("Keyword Exception: "); kEx.printStackTrace(); }
if(check.checkFirstKeyword(line) && line.split(" ")[0].equals(keywords[0])) { System.out.println(line); }
[Code] ....
I'm just unsure of where to go/what to do.
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Dec 13, 2014
I have Stock Tracker application running, everything works just fine, but when i hit the List Users button, i get an SQL Exception which says "Column bot found". I tried searching for the exception from the internet, but the answers didn't suit my needs. below is the Stock Tracker DB i think the exception might be coming from.
public class StockTrackerDB
{
private Connection con = null;
// Constructor: makes database connection
public StockTrackerDB() throws ClassNotFoundException,SQLException
[Code] ......
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Jan 20, 2015
I have got 2 classes in a source file, 1 real class and 1 test class with main() method. While executing with java command which class name should i write - real class or test class???
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Apr 25, 2014
I am working on a magic square program. My program compiles. However, when I enter the square dimension it does not select the correct file. The error says "java.io.FileNotFoundException." It looks like it inserts 0 instead of the entered dimension.
import java.util.*;
import java.io.*;
public class Trial2
{
public static int size, row, col;
public static void main(String[]args)throws java.io.IOException
[Code] ....
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Feb 14, 2014
I was doing coding exercise from a book ('OCP Java SE 6 - Practice Exams' by Kathy Sierra and Bert Bates). I came to a question that told to demonstrate the difference between 'default' and 'protected' access rules by creating/making a directory structure and putting a couple of classes in different packages.
For this, I made a total of four classes, out of which, three classes are-Car, TestingCars, CarDimensions. (The fourth is not yet used in testing code till now, so, I am giving only the other three classes.) Their coding is given below.
Out of these classes, the classes- TestingCars and Car - are in a directory (say, FolderName). And, the class- CarDimensions is in FolderName's sub-folder.
The class 'CarDimensions' is public (and its components too are public). And, I am testing all the classes from the class- 'TestingCars'. But, this class (TestingCars) is not able to find the public class- 'CarDimensions' which is in its sub-folder and gives two 'Cannot find symbol' errors citing the class-CarDimensions. Also, If all three classes are put in one single directory, the programs work, without any error.
Coding:
Class TestingCars:class TestingCars {
public static void main(String[] args) {
Car c = new Car();
c.setType("FourWheeler");
[Code]....
I could not find why the public class- CarDimensions- is not getting found by the TestingCars class.
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Feb 13, 2014
I have a jar file.and i imported its classes to my program..
let say i have a code
source code is at /home/t_bmf/Java/src
import firstjar.FirstJarPrint;
public class TestJar {
public static void main(String[] args) {
//FirstJarPrint jar = new FirstJarPrint();
}
}
well i have successfully compiled it using command below:
javac -cp ".:/home/t_bmf/Java/lib/FirstJar.jar" -d /home/t_bmf/Java/bin TestJar.java
it means that i don't have any compilation error right?so all classes found properly.But whenever I run the program I always got this error:
java -cp /home/t_bmf/Java/lib/FirstJar/jar:. TestJar
Exception in thread "main" java.lang.NoClassDefFoundError: firstjar/FirstJarPrint
at TestJar.main(TestJar.java:6)
Caused by: java.lang.ClassNotFoundException: firstjar.FirstJarPrint
at java.net.URLClassLoader$1.run(URLClassLoader.java: 202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:3 06)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 47)
... 1 more
I think it has to be no error since i have compiled the program successfully right?if it really didn't find the class, then it must be a compilation error right?
is there something wrong with the way I execute the program?
note: i created the program in UNIX
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Jan 25, 2014
The code below keeps giving me errors at runtime.
import java.util.*;
import javax.mail.*;
public class SendSmtp
{
public static void main(String [] args)
{
Properties properties = new Properties();
properties.setProperty("mail.smtp.host", "localhost");
Session mailSession = Session.getDefaultInstance(properties, null);
}
}
My intention is to send email locally on a Dovecot SMTP server using Postfix. I compile it with the command:
javac SendSmtp.java -cp /usr/share/java/geronimo-javamail-1.4-spec.jar
and run it with the command:
java SendSmtp
but I keep getting the error message:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/Session
at SendEmail3.main(SendEmail3.java:15)
Caused by: java.lang.ClassNotFoundException: javax.mail.Session
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 1 more
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Jul 21, 2010
I'm trying to write JUnit test but I'm having trouble with the following errors:
"Test class not found in selected project" -> when running AClassTest.java
"Usage: TestRunner [-wait] testCaseName, where name is the name of the TestCase class" -> when running AClass.java
I have class AClass.java
and class AClassTest.java
They both are in the same package and there is JUnit library
Here's the code:
AClass.java:
Java Code:
public class AClass {
working code is in the last post
} mh_sh_highlight_all('java');
AClassTest.java:
Java Code: public class AClassTest extends TestCase {
working code is in the last post
} mh_sh_highlight_all('java');
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Jun 19, 2014
Whenever I try to write a file to the disk and then load it within the same Class (if it is even possible) ...
It gives me an error: Could not find the main class: score.Score. Program will exit.
I have tried this with 2 different classes and it works fine? Why that error is appearing.
Code:
package score;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Scanner;
public class Score {
public static void main(String [] args) throws Exception
[Code] .....
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Sep 29, 2014
Right, so I got this program. It takes input from the user and assigns it to fields on an object. But, it's meant to check the users input. If the user enters bad input, it's supposed to throw this exception. For each of these exceptions, theres a class specifically for it.
public class PayrollDemo
{
public static void main(String[] args)
{
Payroll pr = new Payroll ("Test Name", 234);
System.out.println("Current Employee Information.
");
System.out.println("Name: " + pr.getName());
System.out.println("ID: " + pr.getID());
System.out.println("Hourly Pay Rate: " + pr.getHourlyPayRate());
[Code] ....
And this is the exception class.
public class InvalidNameException extends Exception
{
/**
No-arg constructor
*/
public InvalidNameException()
{
super("Invalid name");
}
}
PayrollDemo.java:43: error: cannot find symbol
InvalidNameException.InvalidNameException();
^
symbol: method InvalidNameException()
location: class InvalidNameException
1 error
It's just meant to tell the user that they entered an invalid value, which would mean if they entered an empty string instead of a name.
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Oct 18, 2014
I was typing up this program and when I compile it, there aren't any errors, but it won't advance past the second conditional.
Here's the code:
import static java.lang.System.*;
import javax.swing.JOptionPane;
import java.util.*;
public class area51
{
public static void main(String args[])
[Code] ....
The first two answers are 41 and right.
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Apr 11, 2015
I am submitting on a online judge. I am getting NZEC exception in my code
this is my code
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class MyProgram {
static int[] arr;
static int sum=0;
static int x,y,N;
[code]...
what are the causes that is showing NZEC to me?
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Mar 5, 2015
This is my code
import java.util.ArrayList;
import java.util.Scanner;
public class Main {
private String[] inputStrings;
private ArrayList<InputField> decodedMessage;
public static void main(String[] args) throws Exception{
new Main().solve();
[Code] ....
This is giving me NZEC exception.I am testing this solution on a online judge.So I don't have any TestCase in which this is failing. So, what are the possible reason of NZEC exception in my code?
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Oct 6, 2014
import java.util.Scanner;
public class Arraykey {
public static void main(String[] args) {
System.out.println("Enter array size: ");
Scanner input = new Scanner(System.in);
int size = input.nextInt();
int [] a = new int[size];
for(int i=0 ; i<size ; i++){
[Code] ....
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