36,051 Topics
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| | hi, is it possible to have two different version of java on linux centos5 currently it is running 1.6.0 - which i would like to keep it that way sinse i have red5 but i also need 1.4 for a gaming server ES gaming server is asking to use at … |
| | [CODE]ImageIcon tenP1 = new ImageIcon("10p.gif"); tenP = new JButton("", tenP1); ImageIcon twentyP1 = new ImageIcon("20p.gif"); twentyP = new JButton("", twentyP1); ImageIcon fiftyP1 = new ImageIcon("50p.gif"); fiftyP = new JButton("", fiftyP1); ImageIcon pound = new ImageIcon("pound.gif"); onePound = new JButton("", pound); ImageIcon twopound = new ImageIcon("twopound.gif"); twoPound = new JButton("", twopound);[/CODE] … |
| | Hi :) I am trying to make a program that will find the first x perfect squares. I have done and redone this many times, but it never works. So basically, it needs to do two things: check if y is a perfect square. If it is, it needs to … |
| | First of all, I'm new to GUI so I may have made some terrible mistakes.. right, so I have a two dimensional array of buttons and I need to identify which button in the array is clicked, hovered over, and hovered off. For now I just want my program to …  |
| | Hi there guys. I am soon halfway through AP computer science, where we learn Java. Right, now, I'm doing some extra credit programs, both for fun, and to learn this stuff better. However, I got stuck on a few of them, and I really need some advise. I have already …  |
| | Hello Everyone, I am using apache POI 3.7. I am trying to replace the value of a table column in a word document (docx). However, what I have done is it keeps appending the value of the current value in the document. But if a table column value is null, … |
| | i am trying to make this shape using java ********************** ********************** ***************** *************** ************ *************** ****************** i have TRIED at the bottom as u can see but i am unable to get this shape i am confused [code]public class courseforuni { public static void main (String [] args) { int … |
| | Hello! I'm trying to make a class,but an error comes up.I have also an another class named Ticket.Thanks for your help! [CODE]import java.util.*; public class TicketPool{ ArrayList box= new ArrayList(); public void AddTickets () { box .add(new Ticket ()); } public void DisplayTickets (){ for (int i=0;i<box.size();i++){ System.out.println(box.get(i)); } } … |
| | I am using a JFreeChart from this link [ICODE]http://www.java2s.com/Code/Java/Chart/JFreeChartCategoryStepChartDemo.htm[/ICODE] the format of the datasetUtilities.createCategoryDataset is (new String[]{..,..,},new String[]{..,..,},data).Is there any way that i can pass an already filled arrays for countries and years? [CODE] public Chart(String tablenm,final double[][] data,String[] countries,String[] years) { super(); final CategoryDataset dataset = DatasetUtilities.createCategoryDataset( countries,years, data … |
| | Hi all, I have a slight problem with a java applet of mine. I play a video game that tracks realm and world ranks and I'm making this applet to put on my site to display current standings. My main problem is currently in the testing of this applet. Once … |
| | Hey first time posting about code so please say if you need more information than what i give you... I'm having trouble with a timer, am trying to wait 2 secs then add 5 to Defender.Bullets but they are a delay on this and it bugs out if i keep … |
| | in this assignment make the program read 10 integers and store them in an array. Then, pass this array to a method that finds the largest integer in the array, and counts its occurrences. Your method should return a string of the form largestNumber  |
| | I need in jsp two view in one view combobox, combobox contain one,two,three..etc For the user selection second view want to change not the whole page. I need an Idea.Please Help me out. |
| | [CODE]import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.text.*; import java.lang.*; import java.util.*; import java.io.*; public class PaymentNewGUI extends JFrame{ private JButton tenP, twentyP, fiftyP, onePound, twoPound, payButton; JTextField ticketID; Label lEntranceTime; Label lPaymentTime; Label lTimeDifference; Label lDue; Label lInserted; Label lMessage = new Label("Enter Your Ticket Number"); Container … |
| | Hay everyone I need help I have project in subject programming languages about make one idea on two languages c and java . I have made it in java but I couldn't in c this is the code in java [CODE] Class Link // Link.java // to run this program: … |
| | Hi Guys, Am one of those changing careers. I am retraining on an IT Conversion course at the moment and has just started java. Being a conversion program, it is running really fast and I am working really hard to catch up and fully understand, am gonna need all the … |
| | usualy I run java app ( I create by my self) by click it's jar file. How to run it via click an icon on desktop ( how to link between icon and the jar file thank you denny |
| | The withoutcomment.txt file contains : [general] "PC", 0x0, 32, RW, reg , 1, "Program Counter (R15)"; "LR", 0x11, 32, RW, reg , 18, "Link Register (R14)"; "SP", 0x10, 32, RW, reg , 17, "Stack Pointer (R13)"; But i am able to print only first line but its not going to … |
| | So basically I'm stuck at the do-while statement. Should I use a do while? or a for loop? This program is supposed to test my ability to use loops. [CODE]/*Create an application that reads an integer value and prints the sum of all even integers between 2 * and the … |
| | Guys I have been trying to figure this out until this very moment The problem is I need a piece of code that will not allow the user to enter any negative number in the text box This how it should work, if the user trries to enter this "-" … |
 | Hello, I have a file and this it how it looks like: 6 {a, b, c, d, e, f} 1 1 1 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 1 1 1 1 0 1 … |
| | Hi everyone.. i m developing an application to backup files\directories to a server.. i initially developed it in RMI but then to make it possible to run over Internet i made some modifications and used sockets.. I have designed few packets for sending login details, file information to be backed-up, … |
| | Hello, I have a file and this how it looks like: 6 {a, b, c, d, e, f} 1 1 1 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 1 1 1 1 0 1 1 … |
| | [CODE]/*********************Pay Button Listener***************************************/ public class payListener implements ActionListener{ public void actionPerformed(ActionEvent e) { replace(); Ticket getNewPayTime = new Ticket(); getNewPayTime.loadTicket(ticketIDNumber); paymentTime = Ticket.paymentTime; //getting correct ticket pyament time, correction performed by replace method. long timeDifference = paymentTime - entranceTime; SimpleDateFormat sdf1 = new SimpleDateFormat("MMM dd,yyyy HH:mm"); Date paymentdate = new … |
| | hi im having this error i dont now where is the mistake can you halpe me? this is the exception: java.lang.NullPointerException at shape.shape.<init>(shape.java:14) at shape.rectangle.<init>(rectangle.java:17) at shape.listOfSHAPES.init(listOfSHAPES.java:73) at sun.applet.AppletPanel.run(AppletPanel.java:424) at java.lang.Thread.run(Thread.java:619) these are part of my code were it show the error list of shapes class:[CODE] else if(shape.charAt(0)=='R'||shape.charAt(0)=='r') { int … |
| | Hi I've been working with Java for a while now but there's one basic thing I still don't understand. Java got 4 Access Modifiers [LIST] [*]Default [*]Public [*]Private [*]Protected [/LIST] I know the difference between them, the thing is I don't now why you should use different Modifiers. Wouldn't it …  |
| | Hi, please, I want the shortest path algorithm using arrays (Data structure) and the path passing through all the points once and return back to the initial point. ex: 0-1-4-2-3-5-0 (path cost=10) 0-3-2-5-4-1-0 (path cost=15) so 0-1-4-2-3-5-0 is the correct answer. |
| | Hey guys....Namastey!! Am here for your suggestions. I am right now working on a software project which needs to communicate with an custom ECU(Engine/Electronic Control Unit) of a car via a USB-TO-RS232 cable. Before moving ahead i want to be sure, [B][COLOR="Red"]do you think Java is appropriate for such kind … |
| | hey! i m reading java. and at one place i have read Audio interface in which play(), loop() functions are defined,but interface is something in which there can't be any method defined. so this must be abstract not interface.so please tell this problem, y we are calling this as interface. …  |
| | i need to retrieve Date/Time column type value from MS-Access Database. what to write here in this case? [as we write rs.getString() to retrieve String type data from Database]? |
| | i got an example form roseindia on how to send an email. Now it works perfectly like this, and i can send mail to my email adress with that code (thats just a part of it) [CODE]String host = "192.168.1.14"; String from = "Admin@Admin.com"; String to = "myEmailadress.com";[/CODE] but the … |
 | Hi everyone. I'm using jwt 2.5.2 and new to it. I want to create a table (rows & columns) in it. Is this possible with jwt 2.5.2 ? Is there any data type like 'TableItem' ? What is Also, what is character for tab-space in it ? '\t' doesn't work … |
| | i m not getting how to play a mp3 file using applet? i m using AudioClip A = getAudioClip(x); where x is --> URL x=C:'Users'gourav'java_pr; its just a try! i donot know how to use this. it is showing error. tell me how to use audioclip interface? |
| | hi im jenna and i have been learning java i have to write a program that does the stuff listed below i have tried multiple times but i am not getting it right:'( i dont understand what to do please help me :( i have to hand it in to … |
| | I came across a program a program called Enounce MySpeed which allowed me to watch videos (my school lectures) at a faster rate. I was able to watch 60 minute lectures in 25 minutes, so this software was extremely valuable to me. However, this software is shareware, which is dumb, …  |
| | got a problem with a login page, my code doesn't seem to seperate each users details from the database. Here is my code: any suggestions? [CODE]<%@page import="java.sql.*"%> <%@page contentType="text/html"%> <% String loginMessage = ""; String un = ""; String pw = ""; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection cn = DriverManager.getConnection("jdbc:odbc:RentalDB", "", ""); Statement … |
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 | For now the code isn't to complex. Built in Netbeans 7 java 6.... just the basis for now but its very safe connection so thought i'd post it for anyone who needs it. A quit command may be sent to any client by specifying its ID and then press enter … |
| | plz help me How to link Access data base with java code. [CODE] public class DataBaseCon { public static void main(String a[]) throws Exception{ Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection con=DriverManager.getConnection("jdbc:odbc:DataBase"); System.out.println("Sucessfully Connected "); Statement st= con.createStatement(); ResultSet rs= st.executeQuery("Select empid,ename from emp"); while(rs.next()){ System.out.print(rs.getString(1)); System.out.println(rs.getString(2)); } st.close(); con.close(); } } [/CODE] Exception in … |
| | I am new to using swing. I am trying to get a picture to be displayed in a Jframe when a button is pressed. I cannot figure out how to make this work. This is what I have so far: [CODE] import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.awt.image.BufferedImage; import … |
| | I'm using a JFreeChart which I found in this link [ICODE]http://www.java2s.com/Code/Java/Chart/JFreeChartCategoryStepChartDemo.htm[/ICODE] I have modified the code as given below.My problem is how i can change the values in the x-axis so that they don't start from the zero. [CODE]public class Chart1 extends JPanel { /** * */ private static final … |
| | I am running into a problem in a card dealing program. When the Deck Constructor tries to run one of the methods associated with the Applet class, the program will fail with an error set typical to running an application as an applet. This is a school project, and the … |
 | Hey there, I am building a small database app where I allow users to input and retrieve information in and out of database. As part of my application I have this table courses and a java file Course.java that models a Course object. My Course objects have field variables courseID, … |
| | i am reading from file the file is in this format 4 L 100 20 30 200 R 30 20 50 100 O 20 100 100 40 L 30 50 100 100 I'm using string tokenizer now the 4 specifies how many lines I'll have When I read only the … |
| | hello,I am writing a program in java in which I use a jtable to print the data to the users.Do you know how can i get the data of a line when that line gains focus? |
| | [B]Hello Guys, Hope youre all well :) Please can someone kindly tell me how I can write to a specific line. The value to be written needs to be in long and not as a string. The File is as follows: 1324214082786 1313131 Paid 0.0 the seconds line is time … |
| | [CODE]/*********************Pay Button Listener***************************************/ public class payListener implements ActionListener{ public void actionPerformed(ActionEvent e) { String fileName2 = "Ticket/"+ticketIDNumber+".dat"; File ticket2 = new File(fileName2); if(ticket2.exists()){ try{ FileReader fileReader = new FileReader(fileName2); BufferedReader bufferedReader = new BufferedReader(fileReader); bufferedReader.readLine(); //OMIT Entrance Time FileWriter fw = new FileWriter(fileName2); BufferedWriter bufferedWriter = new BufferedWriter(fw); //fw.write("Hello"); bufferedReader.close(); … |
| | Hello, I am experiencing problems when trying to remove elements from an array. I've been asked to create a little program which creates bank accounts containing (name, address, bank account number, balance etc.). I have successfully implemented all the functions except deleteAccount (I would also like to add that my … |
| | This is the piece of code which i am running : [CODE] public static void main(String[] args) throws Exception { System.out.println("Registering Plugin..."); ServiceConnection connection = ServiceConnection.CreateServiceConnection( "ServiceInstance" ); connection.connect(Constants.VCENTER_URL,Constants.VCENTER_USERNAME,Constants.VCENTER_PASSWORD, true); VimPortType service = null; VimServiceLocator locator = new VimServiceLocator(); locator.setMaintainSession(true); if(connection != null){ System.out.println("Connected successfully to vCenter."); service = connection.getService(); … |
| | Hey guys, I am new to Java and recently developed a small GUI-based project in Windows using Netbeans IDE. So I try build the project and retrieve the .jar file and it runs well on my Windows computer. Then I copy the .jar file to a Ubuntu Linux computer and … |
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