NoClassDefFoundError After Decompiling A Class File And A Minor Edit
May 24, 2014
I extracted a jar file and decompiled one of the classes using jad in order to made a small edit (the original jar was looking to load an image file in the current directory, I replaced the current directory with an environmental variable). I went and recompiled that class. It complained that it cannot find some swt classes, so I downloaded swt.jar for Linux from the Eclipse website and specified the classpath to contain it. It compiled fine and I repacked the jar file. But when I tried to execute it I got:
Java Code: Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/swt/widgets/Decorations
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2531)
at java.lang.Class.getMethod0(Class.java:2774)
at java.lang.Class.getMethod(Class.java:1663)
[code]...
I do not get the same error when I execute the original jar file (that complains that it cannot find the image file unless I put the image in the directory I execute it from). I even tried putting swt.jar in the classpath during execution:
Java Code: java -cp "/path/to/swt.jar:." -jar jar-file.jar mh_sh_highlight_all('java');
But got the same error. I'm using IcedteaJDK (OpenJDK) 7 and Linux
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Feb 18, 2015
I am facing NoClassDefFoundError with one of the java standard platform class (java.text.DigitList$1)
java.text.DigitList class is part of rt.jar so it should not create any issue as such.
I am using Java 1.6.0_06
StackTrace:
Unhandled exception java.lang.NoClassDefFoundError: java/text/DigitList$1
at java.text.DigitList.shouldRoundUp(DigitList.java:4 11)
at java.text.DigitList.round(DigitList.java:363)
at java.text.DigitList.set(DigitList.java:351)
at java.text.DigitList.set(DigitList.java:272)
at java.text.DecimalFormat.format(DecimalFormat.java: 584)
at java.text.DecimalFormat.format(DecimalFormat.java: 507)
at java.text.NumberFormat.format(NumberFormat.java:26 9)
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Nov 19, 2014
I want to write a little java program that when ran it will add information to my host file. A screen will pop up with a button on it. When you click the button it will add a few ip to domain connections. In order to edit the host file with notepad you must first give notepad admin privileges. I can't find a way to do this and I'm extremely fresh to programming. Is there a way I can write directly to the file or is there a way to run notepad with elevated privileges?
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Feb 23, 2014
My program was working fine and then without changing anything, it has started throwing me a "Exception in thread "main" java. lang. NoClass Def FoundError: medina/client/ClientGameFrame". I'm dumbfounded as to how this can just suddenly appear after I've been working on this program all week. My research has pointed out that it must be my class paths but as far as I know, the class paths are fine....and why would it suddenly stop working if it was my class paths ?
I have just been trying to compile in netbeans and that's when the error occurs, though I just tried packaging to a jar and the jar works fine...though why not in netbeans?
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Jan 23, 2014
I am implementing code of edit/update row of datatable in jsf.
package org.demo;
import java.util.ArrayList;
import java.util.Arrays;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
@ManagedBean(name="order")
@SessionScoped
[Code] .....
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Feb 10, 2014
I want to display the data on edit link according to Id no .For Ex I have data on the table below
IDName Emp ID Dept Edit
1xyz 3425 abcd Edit
On Edit link display the data according to ID number. How can i write the code.
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Sep 7, 2014
I have been developing what I intent to be a base class for several forms that will allow the user for adding / editing / deleteing records. These records could be customers, products, suppliers etc.
I have designed a basic form that has an add, edit and delete button. For the add button, I would want to clear all the values in all of the controls (textboxes, combox etc) in preperation for adding a new record.
My question is this. Is this something I should do in the base class OR should it be handled in the classes that will extend from the base class? Perhaps if the controls were datalinked to the data they will clear themselves (I haven't got that far yet so I dont know). I thought maybe I could write code in the base class that could loop through all of the controls and call this from the extended classes.
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Mar 28, 2014
I'm using Netbeans IDE and Glassfish application server. I have a JSF CRUD application running with a MySQL database and everything was fine until I was asked to be able to sort a column whose MySQL datatype was Varchar.
Here is my Model for Vehicles:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package entities;
import java.io.Serializable;
import java.sql.Date;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Locale;
[Code] ....
So I changed the datatype to Integer and updated my source code to change the column from String to Integer. When the list displays every thing seems good and the rows are sorted according to the column whose datatype I changed to Integer.
However when I then tried to edit nothing works and I get HTTP Status 505 from Glassfish with the error message
javax.servlet.ServletException: HV000030: No validator could be found for type: java.lang.Integer
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Apr 2, 2015
I currently have all the code working to fill my database and to display it, although I would like to have it displaying in a JPanel but I cannot figure it out so a JFrame will do. Add, Edit and Delete button for the JTable so I can add rows to the table and database, edit existing rows and delete rows also.
Here is the code for my current class.
package ManGUI;
import Database.DatabaseOperations;
import javax.swing.*;
import javax.swing.border.BevelBorder;
import javax.swing.table.DefaultTableModel;
import javax.xml.crypto.Data;
[Code] .....
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May 8, 2014
How to do this editing the last 3 letters of a string that i retrieve from database.. I have a string "111-222-333-000" here's the sample what i want to happen was to edit the last 3 letters of the string ,,
i insert into database "111-222-333-000" then i retrieve it for editing but what i want to happen is when i retrieve it what i can only edit was the last 3 strings only
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May 13, 2014
I just went over how to open and edit text files in java. Was wondering how to open mp3, mp4 and other media files, is there a special package i need to import or plugin that I need to install in eclipse?
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Nov 22, 2014
I am currently developing an android application. there is a problem i got just now. here's the code for java.
public class doReceipt extends Activity
{
boolean nsPutih, nsBeriyani,nsMinyak,aymKurma,aymLemak,aymKari,aymRendang,aymMerah,
prtAsam, dggTomato, dggSinggang, dggMerah,kerabuTaugeh, pindangKacang,jelatah,dalcaSayur,papadom,
kariIkan,ikanMasin, sirapAis, oren,tehTarik,agarAgar, buburKacang,kuih, price;
TextView tvOutput1,tvOutput2, tvOutput3, tvOutput4, tvOutput5, tvOutput6, tvOutput7, tvOutput8, tvOutput9, tvOutput10,
[Code] ....
There is no error shown in the code. but, when i run my program for start, the page before cannot proceed and yet, i cannot proceed to this page and the application stop unexpectedly. below is the error that i gain in logcat.
11-22 06:59:57.664: D/dalvikvm(290): GC_EXPLICIT freed 1505 objects / 106560 bytes in 184ms
11-22 07:00:39.174: D/dalvikvm(320): GC_FOR_MALLOC freed 2489 objects / 160496 bytes in 109ms
11-22 07:00:39.534: E/MENU PAKEJ A(320): Total Price: RM 0.0
11-22 07:00:39.544: D/AndroidRuntime(320): Shutting down VM
[Code] .....
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Feb 5, 2015
As shown in the SS I show the data of the batch from the db.Now I want to edit the data of the jtable using the default Double editors and also show the data using a Date renderer in dd/MM/yyyy format.The problem is when the data is loaded from the db,I am not knowing how to implement and set the editors to double and date.I am new in java.The code of the above is shown as follows.
Java Code:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package Billing;
import java.awt.Component;
import java.sql.Connection;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
[Code]...
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Mar 22, 2014
i want to know how to data show in text box according click edit button.this is jsp file.
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@page import="java.sql.*,java.util.*"%>
<%!ResultSet rs = null;%>
[code]....
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Aug 7, 2014
So when writing my first "Hello World" app everything seemed to work just fine. I wrote the code, compiled it, and then ran the class file and it worked, I got the return Hello World! But when I tried to write another app which is basically the exact same thing just a different sentence, I keep getting a bunch of error codes saying illegal character. I did everything the exact same. I am using Text Edit on a Mac and using Terminal to execute the Java code.
Here is what I wrote....
public class MyFirstApp
{
public static void main( String[] args )
{
System.out.println(“i rule the world!”);
[code]...
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Jul 11, 2014
I can insert data in database, delete aslo using JSP. But facing problem while updating the information saved in database as m using MySQL 2008. I want to see the bring saved in database with particular username into the updateinfo.jsp form.
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Mar 22, 2014
The program below compiles and functions correctly for the most part. It is supposed to be a simple GUI Text Editor with Edit and Format functions. The content pane is supposed to be a scroll pane, however no matter how much I type into the editor, the scroll bar does not appear. Also, the none of the functions under the "Edit" menu work.
Java Code:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import java.util.StringTokenizer;
import java.util.regex.Pattern;
/**
* A simple text editor. It creates and displays the GUI Text Editor.
*/
public class TextEditor extends JFrame implements ActionListener
[Code] .....
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Feb 26, 2015
try {
File configFile= new File("C: Documents and SettingsstudentMy DocumentsNetBeansProjectsCDASsrcconfig.xml ");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("config");
[Code] .....
This code is working properly but i have use path like this
File configFile= new File("srcconfig.xml");
Instead of system directory path i have to use path inside of project but i am getting an error-cannot find the specified file...
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Dec 4, 2014
I have several different PopupWindows that i want to access from the same fragment. I would like for each PopupWindow to be it's own java file. Here is trimmed down code from an example showPopup.java file,
showPopup.java
public class showPopup {
//public class showPopup extends Activity implements View.OnClickListener{
//public class showPopup extends Window {
public static Context appContext;
PopupWindow popupWindow;
SQLiteDatabase db;
EditText edSpeciesLookup,edSpeciesLookupRowid;
[code]...
How do I configure inheritance to allow showPopup() class to reside in it's own Java file and be called from another class (file)? I've reviewed several hours of online resources as well as my reference books with no productive illumination. I've tried a number of possible implementations and extensions such as "public class showPopup extends Activity implements View.OnClickListener{...", and "public class showPopup extends Window.
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Mar 19, 2014
I have a few questions relating to I/o files.
1.) Is FileReader class the same as File Class. In my book it uses File class to read data from a file, but one of the members here used FileReader so I was wanting to know if it's identical function or not.
2.) When creating an output file, I will use
PrintWriter outputfile("hello.txt")
i just read a new topic of " appending data to a file," meaning if I want to preserve the old file I would have to use this. From my understanding all this does is prevents the old data from being deleted.
Now, in my code if I type ( "hello.txt",true)this would preserve the old data?
One more thing, what does this even do
[CODE]FileWriter file=new FileWriter; PRINTWRITER output=new PrintWriter(file) [CODE/]
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Jan 23, 2014
import java.util.Arrays;
import java.util.Iterator;
import java.util.ArrayList;
public class Book {
private String book;
private String authorFirstName;
private String authorSecondName;
[Code] ....
i don't understand, the above code generates an error saying that class book is publc, should be declared in a file called book.java. It is. And when the the public modifier is left out of the class it comiles but I then get a load of compile errors java.lang.noclassdefound error.
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Feb 8, 2014
The compiler won't let me declare more than one class as "public". Am i correct in understanding that this is a java restriction ? This means i need to create a new file, for each public class that i want in a package ? The rest of the classes without access modifier will all be package-private. (Q has been asked before probably, but my search could not be narrowed).
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Jun 4, 2014
How to use a .class file I unpacked from a .jar file I downloaded from the Internet.
I downloaded the commons-io-2.4.jar file from commons . apache . org /proper/commons-io/
In it you can see that there is a class called FileUtil.class:
jar tf commons-io-2.4.jar | grep FileUtil
org/apache/commons/io/FileUtils.class
I extracted this with the following command:
jar xf commons-io-2.4.jar FileUtils.class
It is now in ..uk/ac/ebi/bioinvindex/services/datasearch/commons/FileUtils.class
Now, I have a java file where I would like to use FileUtils.
How do I do that? How do I import it?
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Jul 10, 2014
I am starting to learn java , If suppose we write a simple hello world program
class helloWorld
{
public static void main(String args[])
{
System.out.print("Hello World !");
}
}
And save this as test.java.Now after compiling it a helloWorld.class file is generated.But if we compile the same after adding "public" in front of 1st line, it throws error.
public class helloWorld
{
public static void main(String args[])
{
System.out.print("Hello World !");
}
}
but then changing the file name to the name of the class i.e. helloWorld.java, corrects the error.
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Dec 3, 2014
why should the class name and the file name should be the same in Java.Is it because it makes it easier to organize and maintain your 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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