35,618 Topics
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| | import java.io.*; import java.nio.ByteBuffer; import java.util.zip.*; import javax.crypto.*; import javax.crypto.spec.*; import javax.swing.*; import javax.swing.event.*; import java.awt.*; import java.awt.event.*; public class Steganograph { public static final byte[] VERSION_BYTE= {'2','0','0'}; public static final int OFFSET_JPG= 3; public static final int OFFSET_PNG= 42; public static final int OFFSET_GIF_BMP_TIF= 32; public static final short … |
| | Hello, I have a observer pattern based JTable. With time it is poulated with new data packets. I use addRow functionalities to add my rows. But I want to put always the last coming datapackets at the top. How to do it?? |
| | i am doing a project with a group i have to deal with orders by kind then linked to the driver who will be taking the first customer. the driver can be free or back in 10 min. i have started with the order list with the customer, i have … |
| | I have two files Persons.txt and Hobby.txt.In the third file i want to put all the persons names and add each name some hobbies.This is how my files look like Persons.txt ID;NUME;PRENUME;DATA_NASTERII;PROFESIA 1;Stan;Ilie;22-01-1977;profesor; 2;Becali;GG;01-07-1965;patron; 3;Tanase;Cristian;07-12-1988;fotbalist; 4;Pop;Ion;21-03-1984;pictor; 5;Popescu;Rodica;17-04-1986;sculptor; Hobby.txt ID;NUME;DESCRIERE;NUMAR_MINIM_PERSOANE;ELEMENT_NECESAR 1;baschet;sport in care se arunca mingea la cos;6;minge 2;fotbal;sport in care … |
 | Hi) Guys , please tell me - which java graphic (which make you able to work with winforms) library should be studied at first? I started with SWT , but that i heared that it isn't "standart"...... thanks in advance for help. |
| | Hi, I want to know what is main difference between Single Threaded and MultiThreaded Client-Server? I want to create a client server chat application. Server Form consist: 1 Textarea(text area) (to display text) 1 sendarea(text area) (to type the text to send) 1 Send button (to send the text which …  |
 | Hello I am currently working on this code and the code can be runned well from 100-10,000 random elements after that the heap sort says stack over flow, im thinking the recursive calls are the cause of this, so please healp public static void MAX_HEAPIFY(int [] A, int i, int … |
| | hey guys, i got a question which stuck my brain few days and here is it. i studies some drop down list tutorial but some how i still have no idea to generate a three level drop down list by which value of the drop down list is dynamic, mean … |
| | Hello, I m new to servlets. I have written a servlet program which reads http header of local host! How to read http header of any website say www.google.com? /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package Header; … |
| | Hi, This is the line: Class ourClass = new Class.forName("com.app.something"); And this is the the error: cannot find symbol class forName My IDE is Intellij Idea. This is a particular case, but i want to know what causes this type of error, what should i look for. |
| | Hello, So I'm trying to make a simple register form in Java. I'm trying to code by myself to learn. I followed this tutorial: http://www.newthinktank.com/2012/03/java-video-tutorial-30/ My code seems to be fine, but when run the program, it doesn't look the way I wanted. Right now, this is how it looks: … |
| | Here is a very simple segment of code. What I want is when I click on the button "First Button" then the window become empty. What actually happens is the window just becomes unresponsive. What could be the problem and what could be a solution?? import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import … |
| | Hi! I'm new, sorry if this is in the wrong place, mods please move this if necessary. Basically, I'm trying to give a breif definition of interfaces and abstract classes, please check if these are right: An interface defines what should be done not how it should be done. The … |
| | Hello! I've been staring at my code for a while and I really have no idea where I'm going wrong. I'm working on deleting a specific node (for example, the integer 317)....but for some reason I just keep getting a nullpointer expression. I get the error when it goes into … |
| | i have to create a graph for my project i found an example that was working and followed it first time with graph. i wrote my code got no errors but when i run the code this is what i am getting i don't understand it can some one help …  |
| | I'm working on playing nim, where the person who takes the last object wins. My program is currently working, but it terminates after I only take one bunch of stones (You can take up to 3 at a time), no matter what the pile size is. Is there a way … |
| | hello, i'm leaning about ActionListener but i can't compile my code, i don't know why :( this is the code package javaapplication7; import java.applet.Applet; import java.awt.Button; import java.awt.Color; import java.awt.Label; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class Test extends Applet implements ActionListener{ Button b1=new Button("Red"); Button b2=new Button("Green"); Button b3=new Button("Blue"); … |
| | Hi Guys, i need to create an application that would add or remove user accounts on a mac, also provide the users with the relevent premmisions. This has to be created in order to bulk create users or remove them so the apple provided interface would not be efficiant. Any … |
| | I have an application I'm updating from Java 6 to 7 inorder to get it to run. The code looks like: public Canvas(GraphicsConfiguration config) { this(); graphicsConfig = config; } But when compiled I get: "graphicsConfig is private access" @ line graphicsConfig = config. How can I do the same … |
| | I have a private ArrayList in a class and I'd like to be able to access it outside of this class, what would be the proper way to do this? Right now I've just made the ArrayList public but I would like to allow it to be private. Should I … |
| | package array1; import javax.swing.*; import java.util.Random; class pickrand{ Random rand = new Random(); public static String get(String[] array){ int rnd = rand.nextInt(array.length); return array[rnd]; } } /*********************************************************************/ public class Array1 { public static void main(String[] args) { int size = 10; String[] passcheck = new String[size]; String[] pass = {"abc345", … |
 | I need to make an Evil Hangman game for my Java class. Can anyone help please? I really need help figuring out how to put the words into "families". Also, if you see any problems with my code or any ways that I can make the code simpler, please let … |
| | hi, I prepare for an application to monitor network with the SNMP protocol,I have searched for APIs to help me in developping the code with java language like SNMP4j,but I'am just confused,is this API let me develop a class for searching the MIB values of the agent and thanks. |
 | Hello to all java programmers, I have a problem about method and array. The program will display the second highest value of the inputed set of numbers in the main method. The problem is that it won't accept less than four inputs which mean it is necessary to put 4 … |
| | import java.util.*; import java.io.IOException; import java.util.Scanner; import java.util.Random; public class LinkedListProgram { public static void main(String[] args) throws IOException { int i,number, ran; Scanner sc = new Scanner(System.in); LinkedList<Integer> list = new LinkedList<Integer>(); ListIterator li; String line; Random random = new Random(); int pick = random.nextInt(150); System.out.println("Enter # of nodes"); … |
| | I'm using a loop to get user input and compare it; Idk why but on the first iteration of the while it works fine and displays only once. Second run thru I get two prompts, hoping someone can point out where I'm screwing up. public static void main(String[] args) { … |
| | I need to make a program that runs two threads. One that outputs ping and sleeps for ten second and one that outputs pong and sleeps for ten seconds. Everything works except instead of sleeping for ten seconds everytime the thread is ran its just jumps to the second thread … |
| | I have this Singleton class: package com.CCharles.Singleton; import java.util.ArrayList; public enum Singleton{ INSTANCE; public void createList(){ ArrayList arrayList = new ArrayList(); for(int i=1;i<101;i++) { arrayList.add("Job "+i); } for(int i=1;i<101;i++) { System.out.println(arrayList.get(3)); } System.out.println("DONE"); } public void sayHello(){ System.out.println("Hello World"); } } and I am accessing Using: package com.CCharles.Singleton; import com.CCharles.Singleton.Singleton; … |
| | Hi, I have an application that is running in the system tray. It displays a popup menu when the user right clicks on it. I need to set shortcut keys for displaying the popmenu and also for the menu items. Is this achievable? If yes, then please advice. |
| | I'm very new to programming, so sorry if this is a dumb question. Is it possible to write a program that can view the source of a webpage and extract and re-write a certain part of the code? For example, I would want the program to view the source of … |
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