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40 Visitor Messages

  1. View Conversation
    install java lang null pointer
  2. View Conversation
    Hi Copeg, thanks for reading my post earlier today, i could really use some help/guidance. I posted my code and problem as you asked.
  3. View Conversation
    I need help. But I can't post a topic, why is this?
  4. View Conversation
    i need help Copeg
  5. View Conversation
    I need help. But I can't post a topic, why is this?
  6. View Conversation
    I have request, Do you have any idea of opening Separate Board or topic for "Java certifications", I think it is one of component missing in forum for one-stop Java help and learning. It is just a request!
  7. View Conversation
    I really need you help
    to solve that question.
    Find a java program that calculates:
    1) For linear function
    a. x-and y-intercept

    2) For quadratic function
    a. x-and y-intercepts
    b. vertex

    this assignment will be submit on this Sunday 12 may 2013...
    I really hope that u can help me
  8. View Conversation
    need you help
  9. View Conversation
    hi...i am new in this forum..i downloaded and watched all the Game Development Tutorials and they were really very interesting..thank u so much. i am currently designing a game and i want to add sounds to it (For example :- as soon as the game starts a music will b played, and when i click the start button a different sound track will be played..etc ). moreover i also want to add menubars in my game that will be running simultaneously while the game is being played and will have menues that would be defined by me ( Example :- GamePause , restart, information, options, endgame, etc) i want the menubar to be vertically placed in the right hand side (NOTE :- NOT HORIZONTAL MENUBAR) . i have tried to do it in my own but i faced a lot of errors and difficulties in doing it myself. so i need an expert's advice such as u. so please can u assist me in doing this? i am looking forward to it. video tutorials on SOUNDS and MENUBARS can be really helpful.. please do reply my message, m really stuck in this part for a long time...i am half way through my game and i cannot figure it out.please help.
  10. View Conversation
    i am beginner to java .
    i have use java 1.7.0
    public class samp {
    public static void main(String[] args) {

    i run above program in command prompt properly. but ecplise indego virtual machine launcher display the error as follows:

    "could not find the main class.program will exit."

    java.lang.UnsupportedClassVersionError: jj : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknow n Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$000(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClassInternal(Unknown Source)

    please help me ......
    thanks in advance
Showing Visitor Messages 1 to 10 of 40
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About copeg

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About copeg
Biologist by training, Computer Scientists at heart.
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View copeg's Blog

Recent Entries

The Groovy in Java

by copeg on June 22nd, 2011 at 09:53 PM
Although scripting languages seem like dime a dozen, there is always that learning curve to become familiar (let alone an expert) with a new language. For those who are more familiar with java - enter groovy. Groovy is a powerful higher level language based upon java, making certain tasks trivial to accomplish relative to the low level java equivalent. The power of groovy comes into play in its ability to plug-into java, and be plugged into from java. Groovy can access class files and libraries,

Read More

Updated June 23rd, 2011 at 09:07 AM by copeg



by copeg on May 30th, 2011 at 12:22 PM
Logging is a great method to monitor the progress of a program while at the same time maintaining flexibility to control the output. Simply put, logging is just printing out statements during the runtime of an application. In another blog I described a simplistic method for logging - using System.out.println. More advanced logging libraries however go beyond just printing to the console - their flexibility allows control of when, how, and where to log.

Many logging libraries exist,

Read More

Updated May 31st, 2011 at 07:32 PM by copeg


The Monty Hall Problem

by copeg on May 16th, 2011 at 07:29 PM
The Monty Hall problem is a statistical problem which originates from the television Game show Lets Make a Deal, hosted by Monty Hall. The game is simple: a contestant is presented 3 closed doors, behind one of which is a valuable prize (oftentimes described as a car, whereas the other doors have goats behind them). A contestant chooses a door. The host then opens one of the doors you did not choose, which does NOT contain the prize. Then the host asks - do you want to change your decision? What

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Updated May 16th, 2011 at 07:32 PM by copeg


How and why an SSCCE?

by copeg on March 27th, 2011 at 10:21 AM
The term SSCCE gets thrown around a lot in online programming forums. Its a simple acronym that stands for Short, Self Contained, Correct Example. But what is so important about an SSCCE? For starters, creating an SSCCE provides a very simple example that clearly demonstrates a given problem, helping one receive help and advice much quicker. But it also goes far beyond just that. Often just the process alone of writing an SSCCE will unveil the problem at hand. But even more important, the process

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Debugging with System.out.println

by copeg on March 10th, 2011 at 12:29 PM
System.out.prinln is quite possibly the most useful debugging tool there is - especially for the beginner programmer with no knowledge of other tools such as debuggers, assertions, and/or loggers. System.out.println prints to the command line the values passed to the method as an argument (if an object is passed, the String returned by Object.toString() is printed). For debugging, this tool allows the programmer to evaluate a variable value at a certain position in the code. But that's only the

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Updated March 11th, 2011 at 09:25 PM by copeg