36,051 Topics
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| | Is there a simple way to find and store the depth of every node in a BST using recursion? I can't seem to figure out a straightforward way of doing so. |
 | I'm fairley new to programming in general being a fresh IT graduate. Some software I am developing needs to be able to compress a folder in to a .zip file and later extract it while maintaining its file structure. I am able to do this but extracting the file takes …  |
| | [CODE]import javax.swing.JOptionPane; public class test{ public static void main(String args[]){ String numT = JOptionPane.showInputDialog(null,"Please enter a value."); double num1 = Double.parseDouble(numT); System.out.println("Fahrenheite = "+num1+"\nCelcius = "+convertFtoC( num1 )); } public static double convertFtoC ( double num1 ){ return ((5/9)*(num1-32)); } }[/CODE] why the value return is zero? hrm... can anyone …  |
| | Hello, When I add a simple <c:set var="foo" value="bar"/> line to my jsp I get the following error: javax.servlet.ServletException: javax/el/ELException org.apache.jasper.servlet.JspServlet.service(JspServlet.java:273) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) root cause java.lang.NoClassDefFoundError: javax/el/ELException java.lang.Class.getDeclaredMethods0(Native Method) java.lang.Class.privateGetDeclaredMethods(Unknown Source) java.lang.Class.getDeclaredMethods(Unknown Source) java.beans.Introspector$1.run(Unknown Source) java.security.AccessController.doPrivileged(Native Method) java.beans.Introspector.getPublicDeclaredMethods(Unknown Source) java.beans.Introspector.getTargetMethodInfo(Unknown Source) java.beans.Introspector.getBeanInfo(Unknown Source) java.beans.Introspector.getBeanInfo(Unknown Source) java.beans.Introspector.getBeanInfo(Unknown Source) java.beans.Introspector.<init>(Unknown Source) java.beans.Introspector.getBeanInfo(Unknown Source) … |
| | Hi everyone I have one we application developed using java,servlet and jsp. i am running it using Apache tomcat server 5.5. When i am running it on my local machine, i am given path as [B][url]http://localhost:8080/student/[/url][/B] where as student is name of application. Now if i require run same application …  |
| | I'm fairley new to programming in general being a fresh IT graduate. Some software I am developing needs to be able to compress a folder in to a .zip file and later extract it while maintaining its file structure. I am able to do this but extracting the file takes … |
 | This is not seek for IDE thread but rather want just to know your beloved IDE. For Me, up to recently I used Eclipse but now I'm trying IntelliJ Idea community. Not very used to it but looks promising. What about you friend? |
| | Hi Im a newbie of jsp and Im developing a project in jsp. I want a text box that display data from database in the same place when i click a link.all the links are available in a table. Any help appreciated... Thanks in advance, Indu. |
| | Hi, I would like to know if it's possible to have a web application that processes data like this: 1. Submit form data in a JSP, using the: action="myServlet". 2. In the myServlet code, we process the requests and responses and add what we need to add into sessions. 3. … |
| | Hello, i have a few questions regarding - writing software and using that software in my cell phone. -Which language is best for cell phone software? - Can i use java, and would that be the easiest? -where do i even start when i begin to write a cell phone … |
| | I need to be able to choose one of the three boxes and have then drag around the screen, i can only get 1 of them, kinda of. I want to be able to drag the red one, or the green. I can kinda get the green to drag but … |
| | Are objects that are instantiated from their respective class done so within the code of the class itself (as in on the same document (Class.java) or are they created from the code in main method of the program (Main.java). More questions to build on this... Thanks ahead of time! -Isaiah … |
| | [code=Java] /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package paint1; import java.awt.event.*; import java.awt.*; import javax.swing.*; import java.awt.image.*; /** * * @author Jeanine */ public class MyPanel extends JPanel { private int startX, startY, endX, endY; public int … |
| | I am new to Java and have a class assignment that I need help with.. The assignment is to write a program that computes the tax and tip for a restaurant bill. User is to enter the total amount of the bill. Tax is 6.75% of the bill. The tip … |
| | i am creating a program for hotel management,i want to get the source from JButton and JCheckBox at the same time,how do i do with actionListener? [CODE] import java.awt.*; import java.awt.event.*; import javax.swing.*; public class HotelManagementGUI extends JFrame implements ActionListener {static final String[] rommcouplesea={"1","2","3","4","5","6","7","8","9","10"}; static final String[] roomcoupleroad={"1","2","3","4","5","6","7","8","9","10"}; static final … |
| | i am new in jsp...Can any one help me that how i can upload image in database using one html form and jsp code..........  |
| | Hello could someone please help me as my program is generating some weird error" java.lang.IllegalArgumentException: adding a window to a container" Could someone please look at it and tell me what I'm doing wrong. Im trying to add an object of fan to the panel it creates that error. whenever … |
| | I have created a function that is supposed to go through a text file (csv) and read the information in it and then add it do a dataobject (which just holds the info in textfields and a combobox) which when filled adds itself to the jpanel. The issue I am … |
| | hello can you help me on this i have gel compiler then i want to debug my program but the debug button is not highlighted then it can't be click...ahm can you help me on this or please suggest me if what is the best compiler for java?...thanks in advance … |
| | [code]import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.net.ServerSocket; import java.net.Socket; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.JProgressBar; import javax.swing.JScrollPane; import javax.swing.JTextArea; …  |
| | i am doing project in java.... can any one suggest how to write code for mathematical regression in java.. .or did any one have code for that...... any website is there to learn for mathematical regression... |
| | Hello everyone, I am using the code below. It is working when I used this in Eclipse. What I did is to place the generated keystore from the InstallCert.class ([url]http://blogs.sun.com/andreas/resource/InstallCert.java[/url]) to the latest JRE in the Program Files>Java But when I deployed this class in the Tomcat/Bea its searching I … |
| | iam currently on a program that reads two integers values, with the second has to be a non-zero integer. here is my codes so far: Does it look ok ? PLEASE HELP !:( [CODE]public class Lab2App { public static void main(String[] args) { // Calculate 5 and 3 with relation …  |
| | the application below is what i did so far, please give me feedback the Payroll Program so that it uses a class to store and retrieve the employee's name, the hourly rate, and the number of hours worked. Use a constructor to initialize the employee information, and a method within … |
| | The following lab was originally assigned but skipped over because we were off for MLK day. I would still like to do it but am just not following what I should be doing. Help? In this lab you are going to extend the code you wrote in you first lab. …  |
| | I am having some problems with my java code, i am trying to write a C compiler and am currently working on developing a string tokenizer for the C programming language using java regex. my problem is first my program wont recognize multiline comments and second i cant figure out … |
| | This is probably a stupid mistake but I can't see the issue, it's with the if statement at the bottom: [code=java] /** * Write a description of class Order here. * * @author David Taylor * @version 1.0 */ import javax.swing.*; import java.text.DecimalFormat; public class Client { // instance variables … |
| | I've been having problems with the now deprecated mouseDown and mouseDrag methods, I know the deprecation causes no problem, the program runs fine, but for grading purposes I want my program to be error and warning free, is there any EASY alternative that can solve this deprecation method? I know … |
| | hi all does any 1 here know how to save a Gnatt Chart to png file? thanks! |
| | hi does any 1 can show me a simple code how to show a picture on a j2me cellphone? what i want to do is: i have a tcp server based on j2se. i want it to send a png/jpg to a cell phone via the socket and then show … |
| | Hi, I would need help, pleas. I would like to portray the curve under the specified angles with the repeat and the number of segments. Will you help me please? now I have this: [code] import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.Graphics; import java.awt.HeadlessException; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import … |
| | I have a java applet and i'm letting the user open a chess engine on their computer. Technically they can open any program now. but it wont work unless its a chess engine that uses the winboard protocol. My question is could they maliciously choose to open any sort of … |
| | Forgive me I am still really new to Java. I have this swing application which creates a small JFrame that when clicked, counts down from 2 minutes and stops at zero. I build a GUI in netbeans IDE and I read that in order to place this timer code into … |
| | Hey guys How can i make instances of drawString editable? For example changing their x, y and value? Do i use variables for example [CODE=java]g.drawString(str1, x1, y1);[/CODE] Will the change be reflected as soon as i change the values of the variables? Thanks very much for your time! |
| | Hello I am new at java programming and having a hard time at this very basic coding. How to i write a java application that inouts 3 different integers from the keyboard and prints the outpout as in the following : Output the 3 different integers are: 13, 27, 14. … |
| | I have loaded the rows of the data from the database in the list.Now,i am trying to display the list of datas on the JPanel which is loaded inside the parent JPanel on button click. I have retreived the list of data but not able to display the data on … |
| | I am facing a problem in using JUNG. I want to draw a network diagram where the vertices will be having different shapes and colors and edges will be dashed or full line in different colors. Since I am a newbie in Java, I am unable to understand the actual … |
| | I have to access a uuge data from mysql , Can i replace that db call writing data into text file and accessing it again from the file itself . then file can be removed once data is processed |
| | I keep getting an error starting from line public static boolean hide. Can someone please help I am using eclipse. [code]import java.util.*; import java.io.File; import java.io.*; import java.io.BufferedReader; import java.awt.*; import java.lang.String; public class Steganography { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated … |
| | Hi, I am creating a website where a user has to register to access the site features. Once the user registers, his registration has to be confirmed by the admin guy, who is maintaining the site. The thing is I wanted a way to send an email automatically, once a … |
| | My question is that the program is suppose to randomly generate a addition question with two integers less than 100 this is what i have so far: [CODE]import java.util.Scanner; public class ex3_13 { public static void main(String[] args) { // 1. Generate two random single-digit integers int number1 = (int)(Math.random() … |
| | Hey guys :) I am stuck on this piece of code i am about to give below. What happens, is the server sends a "ping" to the client, the client sends "pong" back, but when the server sends "pong" back to the client (i KNOW this is sent) the client … |
| | Hello all. I have the TreeSet Component that won't add any thing uising the add method ex: [CODE]nameSet.add(projectName);[/CODE] The exception always gets the text in the String projectName xxx for example. and Throws nullpointer and traces out the string but adds null to it. ex xxxnull What more do I … |
| | Hi Everybody, I've created an array to hold the alphabet . It uses the scanner class to ask the user for a position in the array and print that. I have the first part working however I need to use system.array copy to create a new array of size 27, … |
| | I'm making this code for class but it will only display the number of days as 28 29 or 30. Im new to Java and would really appreciate help. [CODE]/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package days; … |
| | Ok... so i am making a rather simple calculator, that solves for either derivatives or a polynomial. Though I have to make my own linkedlist is the challenge. Ok, I will just copy and paste the LinkedList.cpp file: [code]#include <stdlib.h> #include <cstdlib> #include <string> #include <cstdlib> #include <iostream> #include <algorithm> … |
| | Hi guys I just need some enlightenment on how I should implement one of my projects. I've been migrating my codes from unmanaged to manged code and I chose Java as one of our primary PL to use. From time to time I've used some of Java products like GlassFish. … |
| | I'm pretty new to java and I've read some documentation on Layout specifically BoxLayout. I'm not hung up on BoxLayout but it seemed to do what I need. Problem is that label (status) is not left aligned and I can't seem to force it to the left. It will move … |
| | I've taken a few classes in high school that used java (including AP Computer Science A/AB) and have a grasps on the basics of the language. However, I know nothing on making an actual application, since most of the projects we made in class were simple little things; their main … |
| | Hi, I'm working on a dissertation based around graph visualization. I need to make a GUI for my program but I am having trouble getting the JPanels to display what is required. My code so far: [code] //Class to create the GUI import java.awt.GridBagLayout; import java.awt.GridBagConstraints; import java.awt.Component; import javax.swing.JFrame; … |
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