Programming :: Md5 In Java Without Using MessageDigest Class

Sep 18, 2010

I am looking to write a function to return an MD5 hash in Java but I don't want to us the MessageDigest class as I am using the J2ME framework which doesn't include it.

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Programming :: How To Set Up Global Class In JAVA?

May 10, 2011

I've had to do some code in java, a language I'm very much unfamiliarly with so please excuse my incorrect use of terms. The basic outline of my problem is I create a class object as a local within a swing button function it works fine. If I create it as a global ( with I think I need to do ) within main, then prototype it with the other swing objects at the bottom of the file when it is called it causes a host of problems. I think the easiest way is to show it.

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Debian Programming :: Java Can't Find Main Class

May 18, 2010

This is a bit of revision for the OU course M257

Code: Select all import java.util.*;
public class FindDupes {
public static void main(String[] args) {
   Set<String> orig = new HashSet<String>();
   Set<String> dupe = new HashSet<String>();
   for(String a: args)

   System.out.println("words " + orig);
   System.out.println("dudes " + dupe);

for some reason it will compile but not run on debian lenny complains it can't find the main class but it compiles and runs without problem on Fedora 12.

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Programming :: Replacing The File In .Jar - Java.lang.NoClassDefFoundError Exception At Main Class

Jul 21, 2010

working on a script to update .Jar file, I have tried jar xf to unpack and jar cf to repack it is giving me java.lang.NoClassDefFoundError exception at main class. I also tried jar uf, which is also not working for me Basically my jar file requires to update date, which i do from "winrar" Manual it works fine, but now to remove "Donkey work", i want to make an script which does this all automatically, and the last stage is to update jar file which is not happening.

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Fedora :: Error Calling Another Java Class

Feb 4, 2011

I have a simple code like below. when I run this command javac I get this erros. Any solution to this please?

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Ubuntu :: Cannot Execute Java Class File In 9.10

Mar 20, 2010

I installed jdk1.6.0_18 version. Please see below for the version.


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Software :: Set Class Path For Java In Ubuntu 9.10

May 24, 2010

I recently installed java in ubuntu (ver#java1.6.0.00)with many pains.Now I need a clear class path for this java in ubuntu 9.10.

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Debian :: Java Error - Class Applet GUI Not Found

Mar 7, 2010

I have Debian Testing, Kernel 2.6.32-trunk-686 and Java version:
java version "1.6.0_16"
Java(TM) SE Runtime Environment (build 1.6.0_16-b01)
Java HotSpot(TM) Server VM (build 14.2-b01, mixed mode)

If I open web page with Java application (in Opera, Iceweasel and Google Chrome), for example this page: [URL] I get error message (image in attachment). If I click in the Details, I get this text:
Java Plug-in 1.6.0_16
Using JRE version 1.6.0_16-b01 Java HotSpot(TM) Server VM
User home directory = /home/johnnycage
c:clear console window
f:finalize objects on finalization queue
g:garbage collect
h:display this help message
l:dump classloader list
m:print memory usage
o:trigger logging
q:hide console
r:reload policy configuration
s:dump system and deployment properties
t:dump thread list
v:dump thread stack
x: clear classloader cache
0-5: set trace level to <n>

load: class AppletGui not found.
java.lang.ClassNotFoundException: AppletGui .....
Exception: java.lang.ClassNotFoundException: AppletGui

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General :: Convert Java Class Into Jar Archive In (Redhat)?

Jun 7, 2011

I need to know that how to convert a java class file into java archive (jar)

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Ubuntu Security :: Malware-gen In Class Files With Latest Java?

Apr 4, 2011

I browse with Firefox and I had been running a pretty vanilla install of Ubuntu 10.4 (with a few things like tomcat and mysql) I supposed the repos kept everything (like java) up to date.

Some time ago I replaced OpenJDK with SunJDK.
java -version is "1.6.0_24"
which java is /usr/bin/java

Yesterday, for the first time, I downloaded and ran an Avast! scan. It complains of "Malware-gen" in several class files in what I think is the java cache. Does anyone know how this could be?

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Software :: Set Mail.jar - JavaMail - And Mysql-connector-java.jar In Class Path

Jan 18, 2010

I want to ask how i set Linux class path for mail.jar and mysql-connector.jar. I have set the class path for java with the command.


when i do java -version it's work fine.

Also if i want to know that what shell i am using how can i find it.Also what is the command for showing class path variables or how can i see my JAVA_HOME class path.Means after setting the class path for above two files how can i see that these files have added.

When i write echo $CLASSPATH or echo $JAVA_HOME it shows nothing no error but again shows the prompt.

One thing more i want to run a java program on Linux it is in a package (named asteriskproject). It consist of 10 java files. I have run this program on windows using netbeans IDE.For this program i need to set my Linux class path for the above mentioned files, and this is my first time that i am running any program on Linux. So i want to ask how can i run my program. Simply put this asteriskproject directory in any folder and run the main file using javac. Is it right way to run the program that consist of package ?

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Programming :: Build A Simple Program For C Programming Class?

Feb 12, 2011

im trying to build a simple program for my C programming class, this is the source code

#include <stdio.h>
int main()
int length, width, length, height, area, perimeter;
perimeter = width + length + height;
area = width * length + heigth;


i dont see any error (you might)but every time i run it it runs but after it asks me to input for the width i do it but it doesn't take me to the length, it just stays blank until i input another value in the same place for the width, it asks me for 4 inputs in total i don;t know why, and after i run it different times it gives me different values for the perimeter and are. how can I fix this?

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OpenSUSE Install :: Cannot Compile Vdrift-2009-06-15 - Warning: The Options Class Is Deprecated; Use The Variables Class Instead

Mar 12, 2010

I have a problem with compiling vdrift-2009-06-15 using scons. As the source that i obtained only supports scons i cannot use make. the error that i get when i try to compile it in GNOME Terminal is: scons: Reading SConscript files ... scons: warning: The Options class is deprecated; use the Variables class instead.
File "/home/mohit/Download/vdrift-2009-06-15/SConstruct", line 9, in <module>

scons: warning: The BoolOption() function is deprecated; use the BoolVariable() function instead.
File "/home/mohit/Download/vdrift-2009-06-15/SConstruct", line 13, in <module>
Checking for C++ header file asio.hpp... (cached) yes
Checking for C++ header file boost/bind.hpp... (cached) yes
Checking for C++ header file GL/gl.h... (cached) yes
Checking for C++ header file GL/glu.h... (cached) yes
Checking for C++ header file SDL/SDL.h... (cached) yes

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Programming :: Passing Class To Itself (CPP)?

May 18, 2010

I'm struggling with the issue of passing a vector of a class to itself, here's what state its in now... (tried many variations, but without direction).

#include <iostream>
#include <string>


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Programming :: C++: Defining A New Class - Periodic B.c?

Apr 9, 2010

I am trying to make a periodic boundary condition type function, using an existing class given to me in lecture notes, but am having some trouble! Effectively, I am trying to make an array such that, for a point in any row of a 2D matrix ("Matrix(i,j)"), the command "next_i[i]" will return "(i+1)%L", where L is the number of data points in the row. This will enable me to select a point to the right of any point in the matrix: "Matrix(next[i],j)"


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Programming :: Use A Class Inside A Struct?

Apr 8, 2011

Is is possible to use a class inside a struct? I keep getting segmentation fault with this code:


struct my_struct {
unsigned count;
std::string msg;


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Programming :: Unable To Compile Class For JSP?

Mar 15, 2011

My new guy has created several functioning webpages on his machine with TOMCAT 6 with Sun JDK, yet our machines use TOMCAT 5.5 with Open JDK, which his webpages don't show. Do you have any idea how to make them work? The error showing in a browser:

HTTP Status 500 -
type Exception report

description The server encountered an internal error () that prevented it from fulfilling this request.

exception org.apache.jasper.JasperException: Unable to compile class for JSP:


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Programming :: How To Modify ArrayList From Outside Of Class?

Mar 10, 2010

Okay so I'm working on a program here as I'm learning java,I have an array that is initialized with 5 objects that are hard coded. I have made a GUI that takes the input needed and creates an object with those values.I need to add that object to the ArrayList that I have previously made.Okay, so I have three classes,, and Objects are made and defined in "gladiator".Main contains my public static void main section, launches my gui, creates my five hard coded objects, creates my ArrayList and adds my five hard coded objects to the ArrayList.Now, I need to add the object that I generated in the guiSection [action Listener]to the ArrayList that I created in my main class's public static void main string... section. Problem is my arraylist "cannot be resolved" from guiclass.

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Programming :: Php And Variable Class Names?

Sep 30, 2010

How can I handle the situation below so that the "Fatal Error" message is not shown. It would be ideal if I could supply a default class to be used. I'd prefer to not use: ini_set() to supress the errors but actually be able to "handle" the error.

class MyClass


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Programming :: Possible To Communicate Values Between Class?

Feb 24, 2009

I have a application in C++, and now I have two class. MyDialog is the class that main function launch. In MyDialog class there are four elements and when I click over theese elements, there is a MousePressEvent that launch other class, Touchpad class. So, in some moments, I have loaded two class. My question is, how can pass a value from Touchpad class to MyDialog class, when I close (destroy) Touchpad class. In a few words, is it possible to communicate values between class?

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Programming :: Implement A Set Class (like In Stl) Using A Vector?

Sep 3, 2010

i need to implement a Set class(like in stl) using a vector.Here is my code that doesnt work corectly:

#include <iostream>
#include <vector>
template<class T>
class Set


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Programming :: Implement C_str() For A String Class?

Oct 19, 2010

How can I implement c_str() for a string class?

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Programming :: Declaring A Vector Inside A C++ Class?

Mar 23, 2010

Is it not possible to declare a vector inside a C++ class ? Have a look at the following code:


#include <stdio.h>
#include <iostream>
#include <malloc.h> // malloc
#include <strings.h> // bzero


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Programming :: Default Port For UDPWriter Class?

May 9, 2011

This is a really specific question, but maybe someone can help. I'm debugging someone else's code, and they call a UDPWriter and specify an IP address and port, and I'm trying to make sure this multicast traffic goes over a certain port. How can I determine which port the UDP defaults to and change it?

It's confusing to me because I'm not familiar with all the layers the OS sends traffic through before it goes through the interface. Is there maybe some simpler way to tell the OS to send multicast traffic over both interfaces?

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Programming :: Function Pointers To Class Members Cpp

May 23, 2010

i'm a bit stuck playing with the following class setup for glut. The actual issue is with the function pointers.Basically the following code is the opengl redbook cube example slightly modified.

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Programming :: Getting Undefined Reference To Main In Sub-class For BST?

Apr 27, 2011

I'm writing a binary search tree class to insert records and I'm stuck on the following error:

/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status
Here is the code for my class:


I really don't know how to approach this, I thought that everything was working fine but I have no idea what is wrong. Also, for clarification, main() is in a different .cpp file that #includes "tree.h"

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Programming :: JApplet Class Not Loading / Resolve This?

Jan 5, 2011

I have a JApplet class I have copied to both a windows and a linux server. When I open up a webpage with the applet in it in my browser from both servers (http://server1/....) I can only get it to work from the Windows server. The Java console on my PC pops up complaining it cannot find the class file on the Linux server. Has anyone experienced anything like this before and how have you solved the problem?

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Programming :: Python - Get A Return Value From A Class'd Function?

Mar 11, 2011

I'm trying to teach myself python (from Learn Python the hardway e-book) but am struggling to grasp the concepts of Classes etc. Part of exercise 43 is to rewrite the game / create a new game with classes for each room etc. So I'll show you my code so far and explain at the bottom my problem

from sys import exit


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Programming :: Saving Serializable Object Within It's Own Class

May 12, 2011

I found out how to save an object using Serializable in JAVA, the standard however how can I set up my MainVariableList to have a function/method saveobject so it saves the object within it's own class, the below code compiles, however when I run it reports an error on startup but works, basically what do I use for the red line, how do I tell it what object is passed to the class?

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Programming :: Subscript Operator For A List Class?

Jun 27, 2010

how to overload the subscript operator ([]) for a list class?

template <typename T>
class list
struct node


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