Java Applications and Applets

Are local Java programs only command line runnable? How can I create exe like programs? I already know about how Java doesn't use compilation, but bytecode interpretation.
Can applets run locally or only browserly.

Are local Java programs only command line runnable?Several programs set up batch files to invoke it with java.
How can I create exe like programs?You can make an executable jar, and the java interpreter is invoked normally.
I already know about how Java doesn't use compilationIt does use compilation. Java code compiles to java bytecode. This is run on the java interpreter. It doesn't compile down to native machine code, but it IS compiled.
Can applets run locally or only browserly. Applets can run locally in using applet runner.

Similar Messages

Application and Applet

Is it possable to run one program that reads in values threw a normal java application and then calls on an applet to display something?

It sounds like you haven't grasped the fact that you can write a straight Swing application with a full graphics interface which isn't an Applet (I must admit that when, somewhere back in the age of the dinosaurs, I first started to read about Java I was confused by the emphasis on applets, which are really not very useful).
Such an application has a main() method as usual, but all that the main() usually does it to create an object which extends JFrame and call setVisible(true) on it. From that point all the action is in response to user generated events on the window.

How to use " toFront() " method in java application and in which package or

How to use " toFront() " method in java application and in which package or class having this toFront() method.if anybody know pl. send example.

The API documentation has a link at the top of every page that says "Index". If you follow that and look for toFront(), you will find it exists in java.awt.Window and javax.swing.JInternalFrame.
To use it in a Java application, create an object x of either of those two classes and write "x.toFront();".

Help please! Java application and web application...

Hi,
I have a problem with inserting a java application (Main.java) in a web application(index.jsp).
I found a source demo of a drag and drop application on the Internet, but now I want to
have the drag and drop application work in a Jpanel/JFrame in a webapplication.
The drag and drop application code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
public class Main {
    public static void main(final String[] args) {
        final ButtonGroup grp = new ButtonGroup();
        final JPanel palette = new JPanel(new FlowLayout(FlowLayout.LEFT));
        palette.setBorder(BorderFactory.createTitledBorder("Palette"));
        final MainPanel mainPanel = new MainPanel();
        mainPanel.setPalette(palette);
        for(int j=0; j<4; j++){
            final JToggleButton btn = new JToggleButton("Panel "+(j+1));
            palette.add(btn);
            grp.add(btn);
            btn.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    mainPanel.setAdding(btn.getText());
        final JFrame f = new JFrame("Drag and drop panels");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(palette, BorderLayout.WEST);
        f.getContentPane().add(mainPanel, BorderLayout.CENTER);
        f.setSize(800, 600);
        f.setVisible(true);
class MainPanel extends JPanel implements MouseListener, MouseMotionListener {
    private JPanel palette;
    private String adding="";
    private SubPanel hitPanel;
    private int deltaX, deltaY, oldX, oldY;
    private final int TOL = 4; //tolerance
    public MainPanel() {
        setLayout(null);
        addMouseListener(this);
        addMouseMotionListener(this);
    public void mousePressed(final MouseEvent e) {
        if( adding != "" ){
            setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
            SubPanel sub = new SubPanel(adding);
            add(sub);
            sub.setSize(sub.getPreferredSize());
            sub.setLocation((int)e.getX(),(int)e.getY());
            revalidate();
            adding = "";
            return;
        Component c = getComponentAt(e.getPoint());
        if (c instanceof SubPanel) {
            hitPanel = (SubPanel) c;
            oldX = hitPanel.getX();
            oldY = hitPanel.getY();
            deltaX = e.getX() - oldX;
            deltaY = e.getY() - oldY;
            if( oldX < e.getX()-TOL ) oldX += hitPanel.getWidth();
            if( oldY < e.getY()-TOL ) oldY += hitPanel.getHeight();
    public void mouseDragged(final MouseEvent e) {
        if (hitPanel != null) {
            int xH = hitPanel.getX();
            int yH = hitPanel.getY();
            int xDiff = e.getX()-oldX;
            int yDiff = e.getY()-oldY;
            int cursorType = hitPanel.getCursor().getType();
            if( cursorType == Cursor.W_RESIZE_CURSOR){           //West resizing
                hitPanel.setBounds( e.getX(), yH, hitPanel.getWidth() - xDiff, hitPanel.getHeight() );
            }else if( cursorType == Cursor.N_RESIZE_CURSOR){     //North resizing
                hitPanel.setBounds( xH, e.getY(), hitPanel.getWidth(), hitPanel.getHeight() - yDiff );
            }else if( cursorType == Cursor.S_RESIZE_CURSOR){     //South resizing
                hitPanel.setSize( hitPanel.getWidth(), hitPanel.getHeight() + yDiff );
            }else if( cursorType == Cursor.E_RESIZE_CURSOR){     //East resizing
                hitPanel.setSize( hitPanel.getWidth() + xDiff, hitPanel.getHeight() );
            }else if( cursorType == Cursor.NW_RESIZE_CURSOR){     //NorthWest resizing
                hitPanel.setBounds( e.getX(), e.getY(), hitPanel.getWidth() - xDiff, hitPanel.getHeight() - yDiff );
            }else if( cursorType == Cursor.NE_RESIZE_CURSOR){     //NorthEast resizing
                hitPanel.setBounds( xH, e.getY(), hitPanel.getWidth() + xDiff, hitPanel.getHeight() - yDiff );
            }else if( cursorType == Cursor.SW_RESIZE_CURSOR){     //SouthWest resizing
                hitPanel.setBounds( e.getX(), yH, hitPanel.getWidth() - xDiff, hitPanel.getHeight() + yDiff );
            }else if( cursorType == Cursor.SE_RESIZE_CURSOR){     //SouthEast resizing
                hitPanel.setBounds( xH, yH, hitPanel.getWidth() + xDiff, hitPanel.getHeight() + yDiff );
            }else{      //moving subpanel
                hitPanel.setLocation( e.getX()-deltaX, e.getY()-deltaY );
            oldX = e.getX();
            oldY = e.getY();
    public void mouseMoved(final MouseEvent e) {
        Component c = getComponentAt(e.getPoint());
        if (c instanceof SubPanel) {
            int x = e.getX();
            int y = e.getY();
            int xC = c.getX();
            int yC = c.getY();
            int w = c.getWidth();
            int h = c.getHeight();
            if(       y >= yC-TOL   && y <= yC+TOL && x >= xC-TOL   && x <= xC+TOL ){
                c.setCursor(new Cursor(Cursor.NW_RESIZE_CURSOR));
            }else if( y >= yC-TOL   && y <= yC+TOL && x >= xC-TOL+w && x <= xC+TOL+w ){
                c.setCursor(new Cursor(Cursor.NE_RESIZE_CURSOR));
            }else if( y >= yC-TOL+h && y <= yC+TOL+h && x >= xC-TOL   && x <= xC+TOL ){
                c.setCursor(new Cursor(Cursor.SW_RESIZE_CURSOR));
            }else if( y >= yC-TOL+h && y <= yC+TOL+h && x >= xC-TOL+w && x <= xC+TOL+w ){
                c.setCursor(new Cursor(Cursor.SE_RESIZE_CURSOR));
            }else if( x >= xC-TOL   && x <= xC+TOL ){
                c.setCursor(new Cursor(Cursor.W_RESIZE_CURSOR));
            }else if( y >= yC-TOL   && y <= yC+TOL ){
                c.setCursor(new Cursor(Cursor.N_RESIZE_CURSOR));
            }else if( x >= xC-TOL+w && x <= xC+TOL+w ){
                c.setCursor(new Cursor(Cursor.E_RESIZE_CURSOR));
            }else if( y >= yC-TOL+h && y <= yC+TOL+h ){
                c.setCursor(new Cursor(Cursor.S_RESIZE_CURSOR));
            }else{
                c.setCursor(new Cursor(Cursor.MOVE_CURSOR));
    public void mouseReleased(final MouseEvent e) { hitPanel = null; }
    public void mouseClicked(final MouseEvent e) {}
    public void mouseEntered(final MouseEvent e) {}
    public void mouseExited(final MouseEvent e) {}
    public void setAdding(final String string) {
        adding = string;
        setCursor(new Cursor(Cursor.HAND_CURSOR));
    public void setPalette(final JPanel panel) { palette = panel; }
class SubPanel extends JPanel {
    public SubPanel(final String name) {
        setPreferredSize(new Dimension(100, 100));
        setBorder(new TitledBorder(new LineBorder(Color.BLACK), name));
}This application works with JFrame, but I want to display the JFrame in a webapplication (JSP Page).
I'm using Netbeans 6.0 (GlassFish) to create webapplication using Visual Web JavaServer Faces.
So in summary:
How can i display the drag and drop application into a JFrame (better in a JPanel) in a webapplication (index.jsp)??
Hope you can help...
Thanks in advance...
Greetings,
Rajsh

So have an applet that opens a JFrame... JSP or not has nothing to do with it, since it's nothing but HTML the client gets.
You can't have a JFrame embedded in an HTML page. And if you could have an applet but don't know how to get that copied code to fit inside (I mean, content pane is content pane), you might want to consider learning how to do that.

Help on moving of image across screen(java application,not applet)

I've searched the entire internet and everything I've found is on java applets and I'm an alien to the differences between an applet and an application.
This is actually for a java game I'm creating using Eclipse's visual editor and I'm failing miserably.
What I'm trying to do is to find some java source code that enables me to start an image automatically moving across the screen that only stops when I click on it. I did find some applet codes but when I tried converting it to application code a load of errors popped out.
Thanks for the help if there's any! I'm getting desperate here because the game's due this friday and I'm stuck at this stage for who knows how long.

Here is one of the codes I found ,it's not mine but I'm trying to edit it into a java application instead of an applet...Sort of like: ' public class MovingLabels extends JFrame ' or some code that I can copy and paste into another java program.
* Swing version.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MovingLabels extends JApplet
implements ActionListener {
int frameNumber = -1;
Timer timer;
boolean frozen = false;
JLayeredPane layeredPane;
JLabel bgLabel, fgLabel;
int fgHeight, fgWidth;
int bgHeight, bgWidth;
static String fgFile = "wow.gif";
static String bgFile = "Spring.jpg";
//Invoked only when run as an applet.
public void init() {
Image bgImage = getImage(getCodeBase(), bgFile);
Image fgImage = getImage(getCodeBase(), fgFile);
buildUI(getContentPane(), bgImage, fgImage);
void buildUI(Container container, Image bgImage, Image fgImage) {
final ImageIcon bgIcon = new ImageIcon(bgImage);
final ImageIcon fgIcon = new ImageIcon(fgImage);
bgWidth = bgIcon.getIconWidth();
bgHeight = bgIcon.getIconHeight();
fgWidth = fgIcon.getIconWidth();
fgHeight = fgIcon.getIconHeight();
//Set up a timer that calls this object's action handler
timer = new Timer(100, this); //delay = 100 ms
timer.setInitialDelay(0);
timer.setCoalesce(true);
//Create a label to display the background image.
bgLabel = new JLabel(bgIcon);
bgLabel.setOpaque(true);
bgLabel.setBounds(0, 0, bgWidth, bgHeight);
//Create a label to display the foreground image.
fgLabel = new JLabel(fgIcon);
fgLabel.setBounds(-fgWidth, -fgHeight, fgWidth, fgHeight);
//Create the layered pane to hold the labels.
layeredPane = new JLayeredPane();
layeredPane.setPreferredSize(
new Dimension(bgWidth, bgHeight));
layeredPane.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
if (frozen) {
frozen = false;
startAnimation();
} else {
frozen = true;
stopAnimation();
layeredPane.add(bgLabel, new Integer(0)); //low layer
layeredPane.add(fgLabel, new Integer(1)); //high layer
container.add(layeredPane, BorderLayout.CENTER);
//Invoked by the applet browser only.
public void start() {
startAnimation();
//Invoked by the applet browser only.
public void stop() {
stopAnimation();
public synchronized void startAnimation() {
if (frozen) {
//Do nothing. The user has requested that we
//stop changing the image.
} else {
//Start animating!
if (!timer.isRunning()) {
timer.start();
public synchronized void stopAnimation() {
//Stop the animating thread.
if (timer.isRunning()) {
timer.stop();
public void actionPerformed(ActionEvent e) {
//Advance animation frame.
frameNumber++;
//Display it.
fgLabel.setLocation(
((frameNumber*5)
% (fgWidth + bgWidth))
- fgWidth,
(bgHeight - fgHeight)/2);
//Invoked only when run as an application.
public static void main(String[] args) {
Image bgImage = Toolkit.getDefaultToolkit().getImage(
MovingLabels.bgFile);
Image fgImage = Toolkit.getDefaultToolkit().getImage(
MovingLabels.fgFile);
final MovingLabels movingLabels = new MovingLabels();
JFrame f = new JFrame("MovingLabels");
f.addWindowListener(new WindowAdapter() {
public void windowIconified(WindowEvent e) {
movingLabels.stopAnimation();
public void windowDeiconified(WindowEvent e) {
movingLabels.startAnimation();
public void windowClosing(WindowEvent e) {
System.exit(0);
movingLabels.buildUI(f.getContentPane(), bgImage, fgImage);
f.setSize(500, 125);
f.setVisible(true);
movingLabels.startAnimation();
}

HOw to create a Batch file for java application and whats the use of this ?

HI,
How to create a Batch file for java application ?
And whats the use of creating batch file ?
Thanks in advance

First of all, you're OT.
Second, you can find this everywhere in the net.
If you got a manifest declaring main class (an classpath if needed), just create a file named whatever.bat, within same directory of jar file, containing:
javaw -jar ./WhateverTheNameOfYourJarIs.jar %*By the way, assuming a Windows OS, you can just double click the jar file (no batch is needed).
Otherwise use:
javaw -cp listOfJarsAndDirectoriesSeparedBySemiColon country/company/application/package/className %*Where 'country/company/application/package/' just stands for a package path using '/' as separator instead of '.'
Don't specify the .class extension.
Javaw only works on Windows (you asked for batch, I assumed .BAT, no .sh), in Linux please use java.exe (path may be needed, Windows doesn't need it 'cause java's executables are copied to system32 folder in order to be always available, see PATH environment variable if you don't know what I'm talking about) and use ':' as classpath (cp) separator.
The '%***' tail is there in order to pass all parameters, it only works on Windows, refer to your shell docs for other OSs (something like $* may work).
This way you have a command you can call to launch your code (instead of opening NetBeans just to see your app working). You could schedule tasks on it or just call it in any command prompt (hope you know what it is 'cause there have been people in this very same forum with no clue about it, if not just hold the 'Windows button' and press 'R', then type 'cmd' and run it).
Finally add dukes and give 'hem away.
Bye.

How to send attachments using java application and outlook

Hi ,
I created an application in java which is as
on the Conference Tab i can schedule a conference and with the send command on page it map all the scheduled data to outlook(with all conference details) and using outlook send option the mails are send to appropriate user.
but now i want to modify this application such as when i use the send command from my jsp page it should attach the file that is in .vcs or .ics format for auto updation of user calender.
can any one know how to send attachment using java application .

Last time I checked, SMS was a service between carriers and doing SMS yourself was really tricky. Some services existed to let you do it but as I recall they wanted non-trivial money.
However, most phone carriers provide an email-to-SMS bridge of some kind.
So the easiest thing is just to send an email.
That's sending from a non-phone to a phone. There's a J2ME library to send/receive SMS from/to a phone.
However, this is from memory, and a little out of date, so I could be entirely wrong. Hope it helps anyway.

Two related questions: ColdFusion 10/Java applications and J2EE supported servers

I have two related questions:
1. CF10 and integration with Java Web applications
We have a couple of Java applications running on JRun and interfacing with CF9 applications. The JRun clusters were created through the JRun Admin and, apart from lack of Axis 2.0 support, have served us well for years now. And, as would be the case, the ColdFusion9/Java/Flash application is a critical public-facing application that the business uses for bidding on projects.
It appears that with ColdFusion 10 on Tomcat, we will not be able to run those Java applications on a Tomcat-CF10 JVM cluster. Is this correct? IF so, what are our options?
2. J2EE Application Servers supported by Adobe for CF10
Which of these is correct?
A. This URL (http://www.adobe.com/products/coldfusion-enterprise/faq.html) states "ColdFusion 10 supports IBM® WebSphere, Oracle® WebLogic, Adobe JRun, Apache Tomcat, and JBoss."
B. This URL (http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/coldfusion/pdfs/cf1 0/coldfusion10-support-matrix.pdf) states:
"J2EE application servers: WebLogic Server 10.3, 11.1, WebSphere Application Server 7, ND 7 JBoss 5.1, 6.0, 7.1.0"
I *think* "A" above is wrong re. support for Adobe JRun. It does not specify a version of Apache Tomcat unless it is simply referring to the custom version the comes with CF10.
Option "B" above shows no support of Adobe JRun or 'standard' Apache Tomcat.
Thanks,
Scott

Question 1 above was answered: "No support for Java web applications under CF10's custom version of Tomcat"
Question 2: No answer yet: Is Apache Tomcat (NOT Adobe's customized version) supported for CF10 J2EE deployment? I do not see any installation instructions on how to install CF10 on Apache Tomcat 6 or 7.
Is anybody using Apache Tomcat as their J2EE app servers and, again, NOT Adobe's customized/limited version?
Thanks,
Scott

[Solved] Java applications and awesome issue

Hello Folks,
I know this issue has been solved before, but it didn't work for me:
You all know the issue with the grey windows when starting a java application, right? Well, I have that issue too and I'd like to bring that to work.
I read this article http://awesome.naquadah.org/wiki/Problems_with_Java but the workarrounds didn't work (I didn't try the second one with wmname).
Is there yet any other know workarround? I also tried this one but that one didn't work eighter:
export AWT_TOOLKIT=MToolkit
[tectu@mercur ~]$ awesome -version
awesome v3.4.11 (Pickapart)
• Build: Apr 27 2012 09:01:08 for x86_64 by gcc version 4.7.0 (nobody@archbuild)
• D-Bus support: ✔
[tectu@mercur ~]$ java -version
java version "1.7.0_03-icedtea"
OpenJDK Runtime Environment (IcedTea7 2.1) (ArchLinux build 7.b147_2.1-3-x86_64)
OpenJDK 64-Bit Server VM (build 22.0-b10, mixed mode)
[tectu@mercur ~]$
Does somebody have a working solution for me?
~ Tectu
Last edited by Tectu (2012-05-24 11:21:17)

Oh, the 'wmname LG3D' solution did work indeed.
I was just curious about saying that I use a different window manager, that I thought I'm just gonna try the two other solutions.
Thank you guys!

Configuration of java extensions and applets

Hi,
I'm running IIS5.1/CFMX7.0.1 and once again have difficulty
configuring my extensions/applets:
- extension: cfx_pdf (easel.com)
- self-written richtexteditor applet (swing/jdk1.4) with
retrieval function
After some trouble both have been running on 6.1.
Now I'm upgrading to CFMX 7.0.1, set the class paths and
added both extensions but Java doesn't seem to get the job done.
1. It can't locate the cfx_pdf jar class
2. It is not retrieving the text from the richtexteditor
after a post
Is there any way to verify my settings besides the
webconfiguration tool?
Does CF have an alternative way to configure my extensions?
Each time I configure CF( 6.1 & 7.0) extensions (both C++/Java)
on some server (XP/MS2003 & IIS5.1/6.0) I run in to these
problems...
Cold Fusion is really getting on my nerves with this
issue...

PimDor,
This should not be too hard to figure out. First, click on
the system information link in cfadmin. Check the classpath and
make sure your jar file is there for each cfx. Next, unzip the jar
file using winzip or similar. Just view the main classname and note
its capitalization. Java is case sensitive so when you enter the
java cfx classname it must be spelled correctly. Also, if it is
part of a package you must enter that using dot notation. So, if I
have a CFX_ken that uses Kenco.class in package com.adobe.ken I
enter the classname in cfadmin as: com.adobe.ken.Kenco . Note the
capital K in Kenco. If this package were in ken.jar, I should be
able to find ken.jar listed in the classpath on the sysinfo page.
Finally, as a test you should be able to do a cfobject/java
call and dump the class to confirm the class is available. So
following the above example see the attached code. The cfdump
should show the methods of your cfx class.

Java Applications and Internet

Is there a way to make a java application able to upload or download files from a secure internet site?
i.e. I want o make a program that when I push a button, it uploads my documents to www.boneheadfiles.com (not a real site).

Then you need to make a dos console-based ftp application. Actually I've never done this per se but it isn't so hard;-
1. Make a connection
2. open a socket on port 21
3. write bytes & send it
4. Write another class to receive bytes
Do a search here and in the Java Form for ftp and you'll get lots of source code samples

How to add images into a java application (not applet)

Hello,
I am new in java programming. I would like to know how to add images into a java application (not an applet). If i could get an standard example about how to add a image to a java application, I would apreciated it. Any help will be greatly apreciated.
Thank you,
Oscar

Your' better off looking in the java 2d forum.
package images;
import java.awt.*;
import java.awt.image.*;
import java.io.FileInputStream;
import javax.imageio.ImageIO;
import javax.swing.*;
/** * LogoImage is a class that is used to load images into the program */
public class LogoImage extends JPanel {
     private BufferedImage image;
     private int factor = 1; /** Creates a new instance of ImagePanel */
     public LogoImage() {
          this(new Dimension(600, 50));
     public LogoImage(Dimension sz) {
          //setBackground(Color.green);
          setPreferredSize(sz);
     public void setImage(BufferedImage im) {
          image = im;
          if (im != null) {
               setPreferredSize(
                    new Dimension(image.getWidth(), image.getHeight()));
          } else {
               setPreferredSize(new Dimension(200, 200));
     public void setImageSizeFactor(int factor) {
          this.factor = factor;
     public void paintComponent(Graphics g) {
          super.paintComponent(g);
          //paint background
          Graphics2D g2D = (Graphics2D) g;
          //Draw image at its natural size first.
          if (image != null) {
               g2D.drawImage(image, null, 0, 0);
     public static LogoImage createImage(String filename) { /* Stream the logo gif file into an image object */
          LogoImage logoImage = new LogoImage();
          BufferedImage image;
          try {
               FileInputStream fileInput =
                    new FileInputStream("images/" + filename);
               image = ImageIO.read(fileInput);
               logoImage =
                    new LogoImage(
                         new Dimension(image.getWidth(), image.getHeight()));
               fileInput.close();
               logoImage.setImage(image);
          } catch (Exception e) {
               System.err.println(e);
          return logoImage;
     public static void main(String[] args) {
          JFrame jf = new JFrame("testImage");
          Container cp = jf.getContentPane();
          cp.add(LogoImage.createImage("logo.gif"), BorderLayout.CENTER);
          jf.setVisible(true);
          jf.pack();
}Now you can use this class anywhere in your pgram to add a JPanel

SAP HANA Cloud Portal : Make Widget For Java Application and Display in HANA Portal

Hi Experts,
I have created one Java Application using eclipse luno.
I have successfully deploy on my hanatrial version and able to see the Started Application under the Java Application.
Can anyone have idea how to use this application in HANA portal and display/ run this Java Application in SAP HANA Cloud Portal Website.
I want to know is it possible or not ? and yes then how its possible ?
What are the steps require to make Widget for this java apps and publish on portal.
Many Thanks,
Mithun

Hi Mithun,
yes it's possible and relatively easy - follow Chapter 7 of the guide -
ESPM WebShop Extension
Regards
Kenny

Multi-threaded java application and deadlock down in Oracle library

Hello,
I was running our Java (JDK 1.6_14) application from Windows XP hitting an Oracle (10g) instance on Linux and came across a deadlock issue with two (of 10) threads. Below is the stacktraces (based on Java thread-dump at the command line). This code I've run 30-40 times with no problems of deadlocks.
The Oracle library that we're using for our Java application is ojdbc14.jar and sdoapi.jar (for spatial).
We create our Connection as follows (for each thread -- 10 of them):
public class Worker implements Runnable
private Connection _Conn;
public Worker(...)
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
_Conn = DriverManager.getConnection(url, username, password);
_Conn.setAutoCommit(false);
The code that is already executing these same lines below was already executed by other threads (in their own instance of Worker). So this is very confusing.
Any ideas? Version of the .jar files? Place how we're calling "DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());"?
Thanks, Jim
Found one Java-level deadlock:
=============================
"WORKER_1":
waiting to lock monitor 0x02b50d8c (object 0x22e8af80, a oracle.jdbc.driver.T4CConnection),
which is held by "WORKER_0"
"WORKER_0":
waiting to lock monitor 0x02b50d24 (object 0x22f6d258, a oracle.sql.StructDescriptor),
which is held by "WORKER_1"
Java stack information for the threads listed above:
===================================================
"WORKER_1":
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3410)
- waiting to lock <0x22e8af80> (a oracle.jdbc.driver.T4CConnection)
at oracle.sql.StructDescriptor.initMetaData1_9_0(StructDescriptor.java:1516)
- locked <0x22f6d258> (a oracle.sql.StructDescriptor)
- locked <0x22eabd80> (a oracle.jdbc.driver.T4CConnection)
at oracle.sql.StructDescriptor.initMetaData1(StructDescriptor.java:1408)
at oracle.sql.StructDescriptor.isInstantiable(StructDescriptor.java:892)
at oracle.sql.STRUCT.<init>(STRUCT.java:148)
at oracle.spatial.geometry.JGeometry.store(JGeometry.java:2954)
at oracle.spatial.geometry.JGeometry.store(JGeometry.java:3777)
.......... <our package/class>
"WORKER_0":
at oracle.sql.StructDescriptor.initMetaData1_9_0(StructDescriptor.java:1494)
- waiting to lock <0x22f6d258> (a oracle.sql.StructDescriptor)
- locked <0x22e8af80> (a oracle.jdbc.driver.T4CConnection)
at oracle.sql.StructDescriptor.initMetaData1(StructDescriptor.java:1408)
at oracle.sql.StructDescriptor.isInstantiable(StructDescriptor.java:892)
at oracle.sql.STRUCT.<init>(STRUCT.java:148)
at oracle.spatial.geometry.JGeometry.store(JGeometry.java:2954)
at oracle.spatial.geometry.JGeometry.store(JGeometry.java:3777)
..........<our package/class>
Edited by: Jim Atharris on Aug 24, 2009 6:23 PM

Thanks Toon for your reply.
Yes each Worker (executing in their own thread) has their own instance of Connection as per the Constructor (shown in original post). That is why this is weird.
I'll check the v$session when I get into work.
Based on our code that I put in the original email, Connection is a non-static variable. We have a per Thread per instance of Worker of which that Worker instance has its own instance of Connection. So I'm wonder if the following needs to occur:
Both of these lines (from original email) need to happen in the main thread as follows:
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
for (i=0;i<NUM_OF_WORKERS)
_Conn = DriverManager.getConnection(url, username, password);
new Worker(_Conn);
Thanks,Jim

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