35,619 Topics
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| | Why do I always get the error Student_Id do not have a default value? Is there something some with my code? Cant I do 2 PreparedStement and execute it together? [code] private void cmdaddMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_cmdaddMouseClicked // TODO add your handling code here: //String sql = "INSERT INTO student (Student_ID, … |
| | Hello everyone! My idea is like this: Class MainWindow is a JFrame object, on which there is a JButton object (named button1). When I hit that button, the second window (this window is a JFrame object that is instance of class SecondWindow) will appear with a JTextField object (named textField) … |
| | hi all is there an installer for jar file ? (hopefully free ware) so client run setup.exe to install jar file ? thank you denny |
 | Hi. After many years of having a hobbyist interest in programming but doing other things for a job, I've decided it might be time to attempt a career change to application development. The other areas I've worked in, such as teaching English to non - native speakers, aren't directly relevant …  |
| | using the java swing how can i put a background image to my application in a way that the image will cover the frame . [B]ps [/B]: I'm new to the java so maybe my question is a silly one but i will appreciate any help . |
| | hey guys i did a program for converting number into words and i almost got through but my folks want it even possible for decimal numbers too buti couldnt make that possible and can anyone help me in this and i also attach the codes i did and if something … |
| | I am goign to do a project which needs voice input to be done. I looked through HTML 5 have tags for voice input. I like to use Sphinx 4 to do speech to text conversion? Where do i start? Any help please... |
| | I'm a having a serious problem creating variable. I am creating an application that gets its datas from a database, and before you can access the application you must login first. My problem now is my Login class can do all the validations but I don't know how to set … |
| | I'm working on a music player and I want to make it so that if I'm playing a song and I click on another song in the list the first song stops before I hit play on the second one, without having to manually stop the first. So just the … |
| | I have a text file that has two columns one with time in milliseconds and the other with (x,y) coordinates. I created a JFrame in a class that extends JPanel. It shows a model of constructed ladder that we use in our experiments. Now I want to print some small … |
| | [B]I have a bank class below. What is the best way to add amounts to any instance variable in any of the constructors to make it o when i add different amounts from 2 or more different classes it will update in a way that when i call the method … |
| | Hi everybody. I'm trying to split a string such that every array element would have characters between open and close prentesis. mmm let me just show: myString = "(2*((3-2)+(5-3)))" So my array should have values like that: myArray[0] = 2*((3-2)+(5-3)); myArray[1] = (3-2)+(5-3); myArray[2] = (3-2); myArray[3] = (5-3); I … |
| | Hello all! I am working on a regular expression to be used in descrambling words in my scrabble solver. What I am attempting to do is write a regular expression that can be used to find all characters within a scrambled word, irrespective of order and match them to a … |
| | This code works perfectly fine when I run it as a class file (the font is located in the same directory) - however when I package it into a JAR file it can't find the font and the program crashes. The font is definitely being included in the JAR archive, … |
| | Hello, I am a beginner. I want to setup my local account in debug mode. My code is on the remote server. After setting up my local account in debug mode i want to use that code from a remote server . How should i do that? I am using … |
| | hi there. I am just new in java 3d why my program always says Exception in thread "main" java.lang.NullPointerException: Canvas3D: null GraphicsConfiguration at javax.media.j3d.Canvas3D.checkForValidGraphicsConfig(Canvas3D.java:963) at javax.media.j3d.Canvas3D.<init>(Canvas3D.java:1006) at pkgnew.New.<init>(New.java:39) at pkgnew.New.main(New.java:51) Java Result: 1 however, I already installed j3d and jre. I cannot run and compile my program. Nothing appears when … |
 | Im creating a banking system for a university assignment. Basically I have been struggling with encrypting user data. Its a first year assignment (in a 3 year bachelor) please bear this in mind when commenting x))) [CODE] //The constructor sets the global veriable key to a user defined value. //The … |
| | I've been working on a search engine that users manually add files to, build and inversed index, and can search some text and the program will saw which files have that text in them, you can choose and, or, or phrase search (just working on and & or search at … |
| | hi there.! I have some problem about my calculator. I already made basic calculator but I want to developed it more instead of computing only 2 input I would like to compute this more than two. my calculator looks like windows calculator. tnx and more power. =) |
| | I am trying to read in a file that holds an unknown number of x and y coordinates that are to be later plotted into a 2-D array. Does the file have to be read through twice? Once to determine size of the array needed to plot all coordinates, then … |
| | So I was assigned the task of displaying all numbers divisible by two, five, and every third number in a range which I'm sure you can see how I did that. However I am having trouble as I was asked to use while loops, and I would also like to …  |
| | hi there. my code ws just written in java application thus anyone know how to compile java3d animation compile through netbeans? I already installed j3d and no errors exist. please give me step by step when compiling and running program. I am knew in java 3d animation. tnx. |
| | Hi there I was wondering if their is anyone who can convert this statement from 'INSERT' to 'UPDATE' as I cannot seem to do is. Code can be seen below: [CODE]public static void COUNT2( ) { try { ResultSet res = stmt.executeQuery("INSERT INTO TABLE2 (VIDEOID,VIDEONAME,DIRECTOR,RATING,PLAYCOUNT) SELECT VIDEOID,VIDEONAME,DIRECTOR,RATING,PLAYCOUNT FROM TABLE1" ); … |
| | hello all I create simple software say it's name K.jar ,I place it on desktop I double click it , it run nicely.I close it. I install Nokia Suite (it available on net) When I double click my K.jar ,Nokia Suite run ,my K.jar doesn't run If I uninstalled Nokia … |
| | package com.batch; import java.sql.*; import java.text.SimpleDateFormat; import java.util.ArrayList; import DBConnection.DBConnect; public class Batch { @SuppressWarnings({ "unchecked", "rawtypes" }) public ArrayList BatchAction(String ik) { Connection conn = null; Statement st = null; ResultSet rs; ResultSet rs1; ArrayList al = new ArrayList(); conn = DBConnect.getConnection(); final SimpleDateFormat monthDayYearformatter = new SimpleDateFormat( "dd … |
| | I am writing a front end page on jboss 4.2 and in my main page there are some redirection links to other pages. Somehow, when a user clicks on a link the redirected page address is shown with IP. tag's src attribute is "./newPage.jsp" Can you help me please, am … |
| | Hi everybody. I have a question: My code produces only 1's. Does it show that processor can only do one task at a time or it is just simply becouse I made something wrong? [CODE]import java.lang.Thread; public class SleepThread implements Runnable{ public final int sleepTime = 1000; public String str … |
| | I have stored an array in database field name "[B]exp_values[/B]" like : [{"concentration":"30","answers":60},{"concentration":"30","answers":60},{"concentration":"30","answers":60}] and I want to retrieve from database I am using spring and I created pojo(bean) class like [CODE]public class ExperimentParameterBean { private String username; private String[] exp_values; public String getUsername() { return username; } public void setUsername(String … |
| | hey guys, I'm studying to be a pro C++/Java programmer and are currently working in Ubuntu, is this a suitable choice? Or is there a more suitable linux distro? |
| | Hi i am getting below exception when iam trying to run the tomcat 5 in localhost can u please tell me the steps to solve the problem java.lang.NoClassDefFoundError: sun/tools/javac/Main org.apache.jasper.compiler.SunJavaCompiler.compile(SunJavaCompiler.java:128) org.apache.jasper.compiler.Compiler.compile(Compiler.java:271) org.apache.jasper.servlet.JspServlet.loadJSP(JspServlet.java:546) org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspServlet.java:177) org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:189) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474) javax.servlet.http.HttpServlet.service(HttpServlet.java:802)  |
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