Latest posts from JavaWorld forums

Why float type cast

parveen.gupta.23091987 — Tue, 31 Jan 2012 07:10:53 -0500

in java why float we has to be type cast i.e. float a = (float)2.3; and and if 2.3 is consider as double then why there is a need for that ???

Community Discussion

how to configure Hudson?

akilanpaulraj — Fri, 27 Jan 2012 03:28:22 -0500

i am new to hudson, i have ant based build which is running using windows script (batch files). how to configure build in hudson? kindly help us

Tools and Methods

Desktop java application or browsew based application

hamzaissa — Mon, 23 Jan 2012 12:43:16 -0500

we have an multichannel softphone application where we can do chatting ,video call, voice call, email, what type of software is the best
Desktop java application or browser based application

Core Java

Swing help: Japplet not displayed in browser

i.m.prashant.m — Sat, 21 Jan 2012 15:07:10 -0500

My RegApp.java file contains following code :

import java.applet.Applet;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

import java.awt.*;
/*

*/
public class RegApp extends JApplet implements ActionListener
{
JButton submit=new JButton("Submit");
JButton cancel=new JButton("Cancel");
JTextField cname=new JTextField(20);
JTextField ceid=new JTextField(20);

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Core Java

How to execute a Callable Statement

Ankit Pandey — Mon, 09 Jan 2012 02:18:36 -0500

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.sql.*;


public class JoinTest {

public static void main(String[] args) {

	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

	try {

		System.out.println("Enter name of emp");

		String name=br.readLine();

		Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

		Connection con= DriverManager.getConnection("Jdbc:Odbc:JoinTest","sa","micro123");

		CallableStatement stmt = con.prepareCall("exec getPhone name");

		ResultSet rs=stmt.getResultSet(); 

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Core Java



Java AVL tree
mgau0047 — Tue, 03 Jan 2012 07:42:12 -0500
Hi i am making an AVL tree and i am having some problems in the search method, because a null exception error is given when the program is ran. Here is my code. Can you pls implement for me the search method so the program will run. Thanks in advance
package testavltree;
import java.io.IOException;

import javax.swing.JOptionPane;
/**

 *

 * @author Rapapc

 */

public class TestAVLTree {
    public static void main(String[] args) throws IOException, Exception {

        System.out.println("your inorder traversal is:");

        AVLarray process = new AVLarray(); 

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Core Java



JavaNode is hosting solution for your development project.
yuri.ivanov — Tue, 27 Dec 2011 07:19:51 -0500

JavaNode has integrated all required tools for softwere development with accent on java langauage. bugtracker(Redmine), source code server, continuous integration (jenkins), LDAP


Developing applications requires a set of tools such as bug tracking, source version control server, continuous integration server  and deployment server. It is not easy to find server what provides all services and almost 0 configuration. This is review of hosting solution where you host everything in one place.
 

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Tools and Methods



Ballistic Line help
mi_para — Fri, 16 Dec 2011 07:59:29 -0500
Okay so, here is what I have so far, I am constructing a program that will eventually take a user input angle and velocity and display the ballistic path of a notional projectile, sans friction and whatnot. 
I have yet to build the user defined variables, I am just trying to get the polyline to display in the frame with a pre-defined angle and velocity. Somewhere down the road I would like to animate this, but for right now I am just trying to make it display on a Canvas. 

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Core Java



Problem with back button
satish_ravula — Fri, 16 Dec 2011 05:09:32 -0500
Hi
Your Application logoutSampleJSP3 working fine. But am facing small problem.
When i am login in to the application then i am getting home page. OK this is fine.  But my problem is in home page am clicking back button then it will 
show again  login page without logout. So please solve this problem as soon as possible.
Thanks,

satish.
Enterprise Java



Database data doesn't fill into JTable
neocorp — Tue, 13 Dec 2011 02:09:07 -0500
I've been working on this code for couple of days. My procedure on the database works fine but it doesn't fill into the table. I'm going through the code again and again but I can't find what's wrong... The error I get is: JavaNullPointerException and the line involving is the piece of code that returns notes.length. Here's a piece of my code:



private Object[][] notes = null;

setUpStatusColumn(noteTable, noteTable.getColumnModel().getColumn(2));

protected JTable createTable(GradesModel gradesModel) {

        return new JTable(gradesModel);

    } 

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Core Java