Java Applet With Third Party Jar Not Working - No Class Found Exception
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.
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.
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)
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?
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)
I have An Issue With My Java Applet. Im Trying To Share My Variables With Another Class, But Its Not Working.
Class 1
package com.Tobysmith10.game.main; import java.applet.Applet; import java.awt.Graphics; public class Game extends Applet{ public void init(){ setSize(850,480); public void paint(Graphics g){ g.fillOval(x,y,20,20); } }
Class 2
package com.Tobysmith10.game.main; import java.applet.Applet; public class gameLoop extends Applet implements Runnable{ public int x, y; public void run(){ while(true){ x = 100; y = 100; } } }
So im sharing the x and y variables with the Class 1 , but I get yellow lines under it and when i run the program, it crashes, how do I get class 1 to recognize the variables from class 2 ?
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
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)
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
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
I need to make a scanner (that has a built in ocr) output some content to a browser. I haven't gotten to the browser yet, but the code works when I run it as an application. With the scanner, I received Java code that makes the scanner take a picture, then read from it and output it back to the console. I added a few lines to make it an applet:
Java Code:
import gx.*; import pr.*; import java.applet.*; public class DocScan extends Applet { /** * */ private static final long serialVersionUID = 1L;
[Code] .....
I am using Eclipse as an IDE. Right now my goal is to simply make the scanner "flash". I know that the output is to the console and I will not see anything from it in an applet, but it should still flash.
When I run this code as an application, it works. The scanner takes a picture and then it outputs what it has read to the console.
When I run this code as an Applet, the applet starts and does nothing. It just stays there with no errors of any kind (at least that's what Eclipse is showing me).
I read that I should allow the applet access, so I edited:
grant { permission java.security.AllPermission; }; mh_sh_highlight_all('java');
Which should allow applets full access. However, there is no change - the applet still launches and does nothing. Why is the code not working when I run it as an applet?
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.
I have to implement a face that smiles and frowns. I figured the easiest way to do this was to use JButtons. I also can't close the applet without hitting "end program". I was given a bit of code and had to add onto it. Here's what I have so far.
import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import java.awt.BorderLayout; import java.awt.Graphics; import java.awt.Color; import javax.swing.*; public class AnimationFace extends JFrame { public static final int WINDOW_WIDTH = 400; public static final int WINDOW_HEIGHT = 400;
[Code] .....
It's 90% done but once I changed the face from smile to frown, it lost an eyeball.
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:
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?
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
I have done lots of PrintWriting before but this is the first time I have done it on my new computer and I'm having an error I haven't seen before. This is my code:
Currently on the "File Handling" part of my java journey and came across a tutorial which showed how to copy a file with a single line of code as an alternative to using the core java classes. This involved using classes from the Apache Commons site, but so far I have not had any success in using it properly outside of Eclipse, which I'm staying away from for the time being (I'm using Notepad++).
I'm wanting to add the "Commons IO" library, but I'm guessing there's more to it than simply pasting it the jre/lib or jer/lib/ext folder, because so far my program keeps throwing the same error at compile time.
import org.apache.commons.io.FileUtils; import java.io.IOException; import java.io.FileNotFoundException; import java.io.File; public class CopyFile { public static void main(String[] args) throws IOException, FileNotFoundException {
[Code] ....
COMPILE ERROR
CopyFile.java:1: error: package org.apache.commons.io does not exist import org.apache.commons.io.FileUtils; ^ CopyFile.java:12: error: cannot access FileUtils FileUtils.copyFile(inFile, outFile); ^ bad class file: .FileUtils.class class file contains wrong class: org.apache.commons.io.FileUtils
Make sure it appears in the correct subdirectory of the classpath.
I wrote my own class to represent univariate polynomials and it works fine, but I was quite sure I was reinventing the wheel, and should obviously like to extend my program's functionality using other kinds of mathematical object.
I've been looking and there are of course open source libraries available which contain everything I'd want to do myself, and more, and probably better, saving me a lot of work.
However the usefulness of this kind of library extends far beyond simple practice and would be invaluable in developing more complex applications.
If I were to plan to write an application that I would at some point in the future like to compile into an executable and sell, would I need to take care about any open source libraries used that the compiler relies on? If so, would it be possible at that stage to use just the API and write my own classes replicating the functionality to avoid breaking license agreements?
The library I'm looking at right now is distributed under the Apache license.
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.
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++){
I have problem with this applet. the browser gives page.I don't know wether its not loading or if its extremely slow.Also I am confused on the html part.Should I use tag object or applet and for entering class name data,classid or name.
import java.lang.reflect.InvocationTargetException; public class NewJApplet extends javax.swing.JApplet { @Override public void init() { this.add(fesText); this.add(jButton1); this.add(jLabel1); this.add(jLabel2); this.add(jPanel1);
