Hello, World Applet

Plz Plz help me, im really new to Java and im trying to create a hello wolrd applet, this is the following code im usuing:
class helloWorld
public static void main(String args[])
System.out.println("Hello World");
When i compile and link the applet all i get is a grey screen, and when i rollover my mouse over the rectangle, it says
load: class helloWorld not found
Plz help me, i would really like to expand my knowledge in Java.

im having trouble again with the applet.Are you sure it's an applet? If so, applets are not designed to be run as standalone applications (no main method)...
i really dont get wot this means, plz help me.
java -cp . helloworld.AppYou get a NoClassDefFoundError message because the JVM (Java Virtual Machine) can't find your class. The way to remedy this is to ensure that your class is included in the classpath. The example assumes that App.java contains the "package helloworld;" statement, you have correctly compiled App.java (class names and their corresponding source files should be capitalized), and are running the command from the directory that contains the path helloword/App.class.

Similar Messages

Loading a simple Hello World Applet faster?

I'm new to java. I;m trying to load the hello world applet but the problem is that it takes about 20 to 30 seconds to load at first attempt, I there a way to make this faster, i have tryed making a jar file and running that but nothing changes in speed.

Well, it's always going to be slower to run the applet in a web page in a browser because you have the extra steps of the browser grabbing the files over the network, parsing the HTML fully, displaying the page, and starting the JVM. The appletviewer grabs the files locally, does a simpler parse of the HTML, doesn't have to display much HTML, and already is a JVM.
In my experience, JVMs inside of browsers (the early days) were significantly slower than a JVM you invoked on the command line. Now that there's the plug-in, it's still slower but not by much.
What browser are you using? Are you using a modern browser and the Java plug-in or are you using, say, and old browser with the JVM built in?
Also, how long does it take to download the HTML and the class file from the server? What happens when you download them directly with something like wget or curl?

Simple Hello World Applet

=============Here is the java code:======================
import java.applet.Applet;
import java.awt.Graphics;
public class HelloWorld extends Applet {
public void paint(Graphics g) {
g.drawString("Hello world!", 50, 25);
==============Here is the html code======================
<applet
code = "HelloWorld.class"
name = "Motif"
width = "900"
height = "700"
hspace = "0"
vspace = "0"
align = "middle"
>
=============Here is the error===========================
load: class HelloWorld.class not found.
java.lang.ClassNotFoundException: HelloWorld.class
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:153)
at sun.plugin.security.PluginClassLoader.findClass(PluginClassLoader.java:168)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:114)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:506)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:567)
at sun.plugin.AppletViewer.createApplet(AppletViewer.java:1778)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:496)
at sun.applet.AppletPanel.run(AppletPanel.java:293)
at java.lang.Thread.run(Thread.java:536)
Caused by: java.io.FileNotFoundException: home/bee99001/public_html/class/HelloWorld/class.class
at sun.net.www.protocol.ftp.FtpURLConnection.getInputStream(FtpURLConnection.java:333)
at sun.applet.AppletClassLoader.getBytes(AppletClassLoader.java:261)
at sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:42)
at sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:143)
at java.security.AccessController.doPrivileged(Native Method)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:140)
... 10 more
==================Here is some information===============
Both my class and html files are in the same folder.
=========================================================
10 points if you can solve this for me. Thanks.

Your applet java code is fine: try this
<html>
<applet code = "HelloWorld.class" width = "200" height = "100">
</applet>
</html>
(you didn't close the applet tag </applet> and you don't need the other cr@p)

If the "Hello World" Applet were two classes....

...okay, so I'm oversimplifying. I've written a pretty useful little applet that is now well in excess of 2000 lines - but I've fallen back to my roots as a C programmer to make the thing work as a single class since every attempt I've made to get multiple classes to work on my little web app has failed.
I've tried something (roughly) like this:
======s1.java
package stuff;
class s1 extends Applet
        s2 foo;
        public void init()
                foo = new s2();
======s2.java
package stuff;
class s2
        init()
                int foo = 0/0; (I know it runs if I get exception)
}Now, I jar this up and it attempts to load, but doesn't find s2. Is there
a set of requirements regarding the naming of the package, the naming of
the jar file, etc.? I know I'm missing an import line in s1.java.... what
should that import line read to be able to see s2?
(The .html does load the jar, but throws an exception trying to find the
s2 class.)

Even in c you have to import, though you should not have to do so if you truly have them in the same package (same project same folder). Are you using an IDE?

Having trouble with Hello World web applet...

I used this tutorial,
http://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Java/Chapter01/simpleApplet.html
However, I STILL get a red X on my personal webpage even after compiling everything here.. Another weird thing was, I couldn't even compile it correctly without removing the 'public' before the 'class'.
Heres my code
class HelloWorld extends java.applet.Applet
 public void paint(java.awt.Graphics g)
 g.drawString("Hello World!",50,25);
 System.out.println("Hello World!");
} HTML:
<applet code="HelloWorld.class" width="150" height="50"></applet>And the error I get.
load: HelloWorld.class is not public or has no public constructor.
java.lang.IllegalAccessException: Class sun.applet.AppletPanel can not access a member of class HelloWorld with modifiers ""
 at sun.reflect.Reflection.ensureMemberAccess(Unknown Source)
 at java.lang.Class.newInstance0(Unknown Source)
 at java.lang.Class.newInstance(Unknown Source)
 at sun.applet.AppletPanel.createApplet(Unknown Source)
 at sun.plugin.AppletViewer.createApplet(Unknown Source)
 at sun.applet.AppletPanel.runLoader(Unknown Source)
 at sun.applet.AppletPanel.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)Somebody help me please?

Oh wait, the java file needed the same name as the class...
Getting the same problem still:
oad: HelloWorld.class is not public or has no public constructor.
java.lang.IllegalAccessException: Class sun.applet.AppletPanel can not access a member of class HelloWorld with modifiers ""
 at sun.reflect.Reflection.ensureMemberAccess(Unknown Source)
 at java.lang.Class.newInstance0(Unknown Source)
 at java.lang.Class.newInstance(Unknown Source)
 at sun.applet.AppletPanel.createApplet(Unknown Source)
 at sun.plugin.AppletViewer.createApplet(Unknown Source)
 at sun.applet.AppletPanel.runLoader(Unknown Source)
 at sun.applet.AppletPanel.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
public class HelloWorld extends java.applet.Applet
 public void paint(java.awt.Graphics g)
 g.drawString("Hello World!",50,25);
 System.out.println("Hello World!");
null

Warning Noob: Sending "Hello World!" in Printer using Java Applet

Hello guys!
im a newbie in java programming... i hope that you can help me with my problem.
how can i print "Hello World!" in printer using java applet. lets pretend that the applet is digitally signed.
i tried window.print in javascript but unfortunately, that is not what i am looking for.
thanks for reading my post and i hope that you help me with my quest in java =)

An applet is still part of the Swing package. I assume you're extending JApplet. There isn't anything in the print API that says it can't be done in an applet. Except that you might have to sign your applet Jar file with a digital certificate to get the printing to work.

HOW TO: Create a GUI "Hello World"


This document describes how to create and run a very simple "Hello World"
Java GUI app using JDeveloper. The application will have one button and one
text field. Clicking the button will populate the text field with the message,
"Hello World!"
Creating The New Application
In this section, we will create an application with an empty frame.
<ol>
[*]Choose File | New Workspace.
</li>
[*]Choose File | Save Workspace.
</li>
[*]Enter <TT>HelloGui.jws</tt> as the name for the workspace.
This creates a Workspace called HelloGui. A workspace organizes all the projects
you need to work on at one time.
</li>
[*]Choose File | New Project.
The Project Wizard opens. This wizard will help you create a new project called
HelloGui. A project contains all the files that go together in one "tier"--for
example, all the files belonging to a single Java Application client, or all
the files belonging to an Enterprise Java Bean. Because we are working on
a simple, one-tier application, we will only need one project in our workspace.
</li>
[*]If the Welcome page appears, click Next.
</li>
[*]On the Project Type page, in the What is the Project's Filename?
field, change the filename to <TT>HelloGui.jpr</tt>. Leave the rest of the
path the same.
</li>
[*]Select A Project containing a new... and choose Application
from the dropdown list.
</li>
[*]Click Next.
</li>
[*]On the Project Options page, in the What is the name of the project's
default package field, enter <TT>helloGui</tt>.
</li>
[*]Click Next.
</li>
[*]On the Project Information page, you can enter any information about your
project that you wish.
</li>
[*]Click Finish.
The Application Wizard opens.
</li>
[*]In the Class field, enter <TT>HelloApp</tt>.
</li>
[*]Select the New Empty Frame radio button.
</li>
[*]Click OK.
The Frame Wizard opens.
</li>
[*]In the Class field, enter <TT>HelloFrame</tt>.
</li>
[*]Click OK.
JDeveloper creates an application, <TT>HelloApp</tt>, containing an empty
frame, <TT>HelloFrame</tt>. The source code for these classes appears in the
Navigator, which is the upper left-hand pane in the JDeveloper IDE.
</li>
[*]Choose File | Save All.</li>
</ol>
Adding a Panel to the Frame
In this section, we will now add a panel to the frame. In the next section,
we will add all the other components to this panel.
<ol>
[*]In the Navigator, double-click <TT>HelloFrame.java</tt>.
A viewer opens. This viewer has four tabs at the bottom:
<ul>
[*]Source, the currently active tab, which displays the source code
of the selected class</li>
[*]Design, which invokes a visual layout designer</li>
[*]Class, which invokes an editor for the class' attributes, and
can help you stay JavaBean complient</li>
[*]Doc, which displays the class' JavaDoc
</li>
</ul>
</li>
[*]Click the Design tab.
The viewer now displays a grey square, a graphical mock-up of your frame.
Also, on the right-hand side of your screen, the Property Inspector opens.
This allows you to quickly set attributes and define events for components.
</li>
[*]In the component palette (the tabbed toolbar near the top of your screen),
select the Swing Containers tab.
</li>
[*]Click the blue square (described in rollover text as <TT>JPanel</tt>) and
click on your frame to add the panel.
The Property Inspector now displays attributes of the JPanel.
</li>
[*]In the Property Inspector, click twice inside the box beside the name
field.
</li>
[*]Change the name to mainPanel.
</li>
[*]Click the box beside the layout field.
</li>
[*]Choose XYLayout.
XYLayout is an easy-to-use Layout for prototyping. Later, we will change the
layout to a more portable one.</li>
</ol>
Adding Components to the Panel
In this section, we finish laying out a prototype UI. We will add polish and
portability to the UI later.
<ol>
[*]In the Component Palette, select the Swing tab.
</li>
[*]Select the <TT>JTextField</tt> component, which looks like a text field
with a cursor.
</li>
[*]In your panel, click and drag the cursor to outline the text field.
Don't worry if the text field doesn't have exactly the right size or position.
We will adjust these later.
The Property Inspector now displays attributes of the JTextField.
</li>
[*]In the Property Inspector, change the name (just as you did for the
JPanel) to <TT>displayField</tt>.
</li>
[*]Change the text to nothing (erase the value that is already there).
</li>
[*]In the Component Palette, select the <TT>JButton</tt> component, which looks
like a button being clicked.
</li>
[*]In your panel, click and drag the cursor to outline the button.
The Property Inspector now displays attributes of the JButton.
</li>
[*]In the Property Inspector, change the name and action command
to helloButton.
</li>
[*]Change the text to <TT>Say Hello!</tt>.
</li>
[*]Choose File | Save All.</li>
</ol>
Wiring Up the UI
In this section, we wire the UI so that clicking the button causes "Hello
World!" to display in the text field.
<ol>
[*]In the Property Inspector, select the Events tab.
</li>
[*]Click the box next to the Action Performed field and press the Enter
key.
This creates a method, <TT>helloButton_actionPerformed()</tt>, which will
be invoked when the button is clicked, and displays the source code for the
method stub in the viewer.
</li>
[*]In the viewer, add the following command to the body of the method:
<TT>displayField.setText("Hello World!");</tt>
</li>
[*]Choose File | Save All.</li>
</ol>
Testing the Prototype Application
<ol>
[*]Choose Run | Run "HelloApp".
Your application appears, with a blank text field and a button labeled "Say
Hello!"
</li>
[*]Click the button.
The text "Hello World!" appears in the text field.
</li>
[*]Close your application.</li>
</ol>
Refining the UI
In this section, we polish the UI so that the components have the right size
and alignment, the text in the text field shows up red, and the panel uses the
portable GridBag layout instead of the JDeveloper-specific XYLayout.
<ol>
[*]In the viewer, select the Design tab.
</li>
[*]Select your text field.
</li>
[*]Drag the edges of your text field until it is the size you want.
</li>
[*]Drag the center of the text field until it is the vertical position you
want.
</li>
[*]Right-click the text field and choose Align Center.
This centers your text field horizontally in the frame.
</li>
[*]In the property inspector, click the box next to the foreground field.
</li>
[*]Click the ellipses (...).
A color editor appears.
</li>
[*]Select Red from the dropdown list.
</li>
[*]Click OK.
</li>
[*]On your frame, select your button.
</li>
[*]Drag the right edge of your button until it is the horizontal size you want.
</li>
[*]Select your text field, and multi-select your button by control-clicking
it.
</li>
[*]Right-click your button or text field.
</li>
[*]Choose Same Size Vertical.
This sets the height of all selected components to that of the first selected
component (the text field).
</li>
[*]Right-click your button or text field.
</li>
[*]Choose Align Center.
This aligns the center of all selected components to that of the first selected
component (the text field).
</li>
[*]Select your panel by clicking anywhere on the grey background in the visual
designer.
</li>
[*]In the Property Inspector, click the box beside the layout field.
</li>
[*]Select GridBagLayout from the dropdown list.
</li>
[*]Choose File | Save All.</li>
</ol>
Running the Finished Application From Within JDeveloper
<ol>
[*]Choose Run | Run "HelloApp".
Your application appears, with a blank text field and a button labeled "Say
Hello!"
</li>
[*]Click the button.
The text "Hello World!" appears in the text field, in red.
</li>
[*]Close your application.</li>
</ol>
Deploying the Application to Your File System
<ol>
[*] In the Navigator, right-click <tt>HelloGui.jpr</tt> and choose New Deployment
Profile.
The Deployment Profile Wizard opens.
</li>
[*]If the Welcome page appears, click Next.
</li>
[*]On the Delivery page, select Web Application or Command-Line Application
from the dropdown list, and click Next.
</li>
[*]On the Staging Area page, in the Deployment Destination field, enter
<tt><JDeveloper>/HelloGui</tt>, where <tt><JDeveloper></tt>
is your JDeveloper root directory. Click Next.
</li>
[*]On the Project page, select all the <tt>.java</tt> files and click Next.
</li>
[*]Skip the Archive page and Applet Tags page by clicking Next on each.
</li>
[*]On the Libraries page, shuttle all libraries from the Project Libraries
list to the Deployed Libraries list, and click Next.
</li>
[*]On the Finish page, name the profile <tt>HelloGui.prf</tt>, and click Finish.
</li>
[*]When JDeveloper asks you if you want to deploy now, click Yes.</li>
</ol>
JDeveloper will archive your application files and copy this archive and all
other required libraries to <tt><JDeveloper>/HelloGui</tt>.
Running the Application from the Command Line
<ol>
[*]Open a command-line prompt.
</li>
[*]Enter the following script.
Note: You may want to create a batch file containing this script. Be
sure to replace JDeveloper_Home with your JDeveloper home directory.
<pre>set __CLASSPATH_ROOT_DIR__=JDeveloper_Home\HelloGui
set CLASSPATH="%__CLASSPATH_ROOT_DIR__%\HelloGui.jar"
set CLASSPATH=%CLASSPATH%;"%__CLASSPATH_ROOT_DIR__%\xmlparserv2.jar"
set CLASSPATH=%CLASSPATH%;"%__CLASSPATH_ROOT_DIR__%\classes12.zip"
set CLASSPATH=%CLASSPATH%;"%__CLASSPATH_ROOT_DIR__%\jdev-rt.zip"
set CLASSPATH=%CLASSPATH%;"%__CLASSPATH_ROOT_DIR__%\swingall.jar"
cd JDeveloper_Home\HelloGui
jre -cp %CLASSPATH% helloGui.HelloApp</pre>
</li>
[*]Your application appears, with a blank text field and a button labeled "Say
Hello!"
</li>
[*]Click the button.
The text "Hello World!" appears in the text field, in red.
</li>
[*]Close your application.</li>
</ol>


null

Hello,
I followed your instruction step by step to make this "Hello World", but when I run it, I got message "cannot find the runable node". What do I miss here? Thanks.
<BLOCKQUOTE>quote:<HR>Originally posted by Avrom Faderman ([email protected]):

This document describes how to create and run a very simple "Hello World"
Java GUI app using JDeveloper. The application will have one button and one
text field. Clicking the button will populate the text field with the message,
"Hello World!"
[b]Creating The New Application
In this section, we will create an application with an empty frame.
<ol>
[*]Choose File | New Workspace.
</li>
[*]Choose File | Save Workspace.
</li>
[*]Enter <TT>HelloGui.jws</tt> as the name for the workspace.
This creates a Workspace called HelloGui. A workspace organizes all the projects
you need to work on at one time.
</li>
[*]Choose File | New Project.
The Project Wizard opens. This wizard will help you create a new project called
HelloGui. A project contains all the files that go together in one "tier"--for
example, all the files belonging to a single Java Application client, or all
the files belonging to an Enterprise Java Bean. Because we are working on
a simple, one-tier application, we will only need one project in our workspace.
</li>
[*]If the Welcome page appears, click Next.
</li>
[*]On the Project Type page, in the What is the Project's Filename?
field, change the filename to <TT>HelloGui.jpr</tt>. Leave the rest of the
path the same.
</li>
[*]Select A Project containing a new... and choose Application
from the dropdown list.
</li>
[*]Click Next.
</li>
[*]On the Project Options page, in the What is the name of the project's
default package field, enter <TT>helloGui</tt>.
</li>
[*]Click Next.
</li>
[*]On the Project Information page, you can enter any information about your
project that you wish.
</li>
[*]Click Finish.
The Application Wizard opens.
</li>
[*]In the Class field, enter <TT>HelloApp</tt>.
</li>
[*]Select the New Empty Frame radio button.
</li>
[*]Click OK.
The Frame Wizard opens.
</li>
[*]In the Class field, enter <TT>HelloFrame</tt>.
</li>
[*]Click OK.
JDeveloper creates an application, <TT>HelloApp</tt>, containing an empty
frame, <TT>HelloFrame</tt>. The source code for these classes appears in the
Navigator, which is the upper left-hand pane in the JDeveloper IDE.
</li>
[*]Choose File | Save All.</li>
</ol>
Adding a Panel to the Frame
In this section, we will now add a panel to the frame. In the next section,
we will add all the other components to this panel.
<ol>
[*]In the Navigator, double-click <TT>HelloFrame.java</tt>.
A viewer opens. This viewer has four tabs at the bottom:
<ul>
[*]Source, the currently active tab, which displays the source code
of the selected class</li>
[*]Design, which invokes a visual layout designer</li>
[*]Class, which invokes an editor for the class' attributes, and
can help you stay JavaBean complient</li>
[*]Doc, which displays the class' JavaDoc
</li>
</ul>
</li>
[*]Click the Design tab.
The viewer now displays a grey square, a graphical mock-up of your frame.
Also, on the right-hand side of your screen, the Property Inspector opens.
This allows you to quickly set attributes and define events for components.
</li>
[*]In the component palette (the tabbed toolbar near the top of your screen),
select the Swing Containers tab.
</li>
[*]Click the blue square (described in rollover text as <TT>JPanel</tt>) and
click on your frame to add the panel.
The Property Inspector now displays attributes of the JPanel.
</li>
[*]In the Property Inspector, click twice inside the box beside the name
field.
</li>
[*]Change the name to mainPanel.
</li>
[*]Click the box beside the layout field.
</li>
[*]Choose XYLayout.
XYLayout is an easy-to-use Layout for prototyping. Later, we will change the
layout to a more portable one.</li>
</ol>
Adding Components to the Panel
In this section, we finish laying out a prototype UI. We will add polish and
portability to the UI later.
<ol>
[*]In the Component Palette, select the Swing tab.
</li>
[*]Select the <TT>JTextField</tt> component, which looks like a text field
with a cursor.
</li>
[*]In your panel, click and drag the cursor to outline the text field.
Don't worry if the text field doesn't have exactly the right size or position.
We will adjust these later.
The Property Inspector now displays attributes of the JTextField.
</li>
[*]In the Property Inspector, change the name (just as you did for the
JPanel) to <TT>displayField</tt>.
</li>
[*]Change the text to nothing (erase the value that is already there).
</li>
[*]In the Component Palette, select the <TT>JButton</tt> component, which looks
like a button being clicked.
</li>
[*]In your panel, click and drag the cursor to outline the button.
The Property Inspector now displays attributes of the JButton.
</li>
[*]In the Property Inspector, change the name and action command
to helloButton.
</li>
[*]Change the text to <TT>Say Hello!</tt>.
</li>
[*]Choose File | Save All.</li>
</ol>
Wiring Up the UI
In this section, we wire the UI so that clicking the button causes "Hello
World!" to display in the text field.
<ol>
[*]In the Property Inspector, select the Events tab.
</li>
[*]Click the box next to the Action Performed field and press the Enter
key.
This creates a method, <TT>helloButton_actionPerformed()</tt>, which will
be invoked when the button is clicked, and displays the source code for the
method stub in the viewer.
</li>
[*]In the viewer, add the following command to the body of the method:
<TT>displayField.setText("Hello World!");</tt>
</li>
[*]Choose File | Save All.</li>
</ol>
Testing the Prototype Application
<ol>
[*]Choose Run | Run "HelloApp".
Your application appears, with a blank text field and a button labeled "Say
Hello!"
</li>
[*]Click the button.
The text "Hello World!" appears in the text field.
</li>
[*]Close your application.</li>
</ol>
Refining the UI
In this section, we polish the UI so that the components have the right size
and alignment, the text in the text field shows up red, and the panel uses the
portable GridBag layout instead of the JDeveloper-specific XYLayout.
<ol>
[*]In the viewer, select the Design tab.
</li>
[*]Select your text field.
</li>
[*]Drag the edges of your text field until it is the size you want.
</li>
[*]Drag the center of the text field until it is the vertical position you
want.
</li>
[*]Right-click the text field and choose Align Center.
This centers your text field horizontally in the frame.
</li>
[*]In the property inspector, click the box next to the foreground field.
</li>
[*]Click the ellipses (...).
A color editor appears.
</li>
[*]Select Red from the dropdown list.
</li>
[*]Click OK.
</li>
[*]On your frame, select your button.
</li>
[*]Drag the right edge of your button until it is the horizontal size you want.
</li>
[*]Select your text field, and multi-select your button by control-clicking
it.
</li>
[*]Right-click your button or text field.
</li>
[*]Choose Same Size Vertical.
This sets the height of all selected components to that of the first selected
component (the text field).
</li>
[*]Right-click your button or text field.
</li>
[*]Choose Align Center.
This aligns the center of all selected components to that of the first selected
component (the text field).
</li>
[*]Select your panel by clicking anywhere on the grey background in the visual
designer.
</li>
[*]In the Property Inspector, click the box beside the layout field.
</li>
[*]Select GridBagLayout from the dropdown list.
</li>
[*]Choose File | Save All.</li>
</ol>
Running the Finished Application From Within JDeveloper
<ol>
[*]Choose Run | Run "HelloApp".
Your application appears, with a blank text field and a button labeled "Say
Hello!"
</li>
[*]Click the button.
The text "Hello World!" appears in the text field, in red.
</li>
[*]Close your application.</li>
</ol>
Deploying the Application to Your File System
<ol>
[*] In the Navigator, right-click <tt>HelloGui.jpr</tt> and choose New Deployment
Profile.
The Deployment Profile Wizard opens.
</li>
[*]If the Welcome page appears, click Next.
</li>
[*]On the Delivery page, select Web Application or Command-Line Application
from the dropdown list, and click Next.
</li>
[*]On the Staging Area page, in the Deployment Destination field, enter
<tt><JDeveloper>/HelloGui</tt>, where <tt><JDeveloper></tt>
is your JDeveloper root directory. Click Next.
</li>
[*]On the Project page, select all the <tt>.java</tt> files and click Next.
</li>
[*]Skip the Archive page and Applet Tags page by clicking Next on each.
</li>
[*]On the Libraries page, shuttle all libraries from the Project Libraries
list to the Deployed Libraries list, and click Next.
</li>
[*]On the Finish page, name the profile <tt>HelloGui.prf</tt>, and click Finish.
</li>
[*]When JDeveloper asks you if you want to deploy now, click Yes.</li>
</ol>
JDeveloper will archive your application files and copy this archive and all
other required libraries to <tt><JDeveloper>/HelloGui</tt>.
Running the Application from the Command Line
<ol>
[*]Open a command-line prompt.
</li>
[*]Enter the following script.
Note: You may want to create a batch file containing this script. Be
sure to replace JDeveloper_Home with your JDeveloper home directory.
<pre>set __CLASSPATH_ROOT_DIR__=JDeveloper_Home\HelloGui
set CLASSPATH="%__CLASSPATH_ROOT_DIR__%\HelloGui.jar"
set CLASSPATH=%CLASSPATH%;"%__CLASSPATH_ROOT_DIR__%\xmlparserv2.jar"
set CLASSPATH=%CLASSPATH%;"%__CLASSPATH_ROOT_DIR__%\classes12.zip"
set CLASSPATH=%CLASSPATH%;"%__CLASSPATH_ROOT_DIR__%\jdev-rt.zip"
set CLASSPATH=%CLASSPATH%;"%__CLASSPATH_ROOT_DIR__%\swingall.jar"
cd JDeveloper_Home\HelloGui
jre -cp %CLASSPATH% helloGui.HelloApp</pre>
</li>
[*]Your application appears, with a blank text field and a button labeled "Say
Hello!"
</li>
[*]Click the button.
The text "Hello World!" appears in the text field, in red.
</li>
[*]Close your application.</li>
</ol>

<HR></BLOCKQUOTE>
null

System.out.println - Hello World Example

Hi All
I am using Apache Tomcat and trying t produce a simple output to the browser. Cannot get System.out.println to work. See code and out below:
begin code
<HTML>
<HEAD><TITLE>hello jsp</TITLE></HEAD>
<BODY>
<%@ page language='java' contentType='text/html' %>
<%
String message = "Hello World";
message = message + "\nAFTER";
System.out.println("BEFORE");
%>
<%= (message) %>
</BODY>
</HTML>
END code
--begin browser output
Hello World AFTER
end browser ouput
Would be grateful if someone could explain why the System.out.print statement cannot be seen in the browser output.
many thanks
Naresh

System.out prints to System.out. What that is depends:
In applets, (which the OP was not talking about) it is the Java Console.
In JSP, it's the same as any application by default.
You can change in Java what System.out prints to, but you don't often do this. But in JSP it doesn't print to the browser. JSP is not CGI, which does you the standard out as the destination for written data.

Basic (and I mean basic) java problem with a simple hello world script

I have a simple cut-and-paste html page and java class in my /home/jc158027/java directory.
jc158027> cat HelloWorld.java
import java.applet.*;
import java.awt.*;
public class HelloWorld extends Applet{
Label helloLabel = new Label ("Hello World");
public void init () {
setBackground (Color.yellow);
add (helloLabel);
}Ok, so I javac HelloWorld.java and get HelloWorld.class, so far so good.
Next I create my html page:
jc158027> cat hw.html
<HTML>
<HEAD>
<TITLE>Jay's Java Test Page</TITLE>
<BODY>
<HR>
This line of text comes before the applet.
<APPLET CODE = 'HelloWorld.class" WIDTH=500 Height=90>
</APPLET>

This line of text comes after the applet.
</BODY>
</HTML>The result is that the text lines work, I get a nice grey box with no applet running. Looking at my console I get the following error:
Caused by: java.io.FileNotFoundException: /home/jc158027/java/HelloWorld/class".class (No such file or directory)
What I don't understand is the HelloWorld/class".class portion, shouldn't it be just either HelloWorld".class or HelloWorld/class, it is as though it is trying to look in a directory (class) that does not exist.
What am I missing here?

And if you put dots in where it expects a class name, it assumes those dots are to separate levels in a package name.
So it was looking for a class named "class", which would be in a file called class.class, in a package named "HelloWorld". Packages correspond to directories relative to some classpath root, so it looked for the directory HelloWorld to be the parent of the classes in the HelloWorld package.

Problem with JNI hello world

I found some tutorial on SUN site on how to use JNI. I'm using Eclipse to compije Java and C (via Cygwin) files. Here are complete files:
Hello.java:
class Hello
 public native void sayHello();
 static
 try
 System.loadLibrary("hello");
 catch(Exception e)
 System.out.println("exc");
 public static void main(String[] args)
 Hello h = new Hello();
 h.sayHello ();
}Hello.c:
#include <mingw/_mingw.h> //because there are some types needed for JNI
#include <jni.h>
#include "Hello.h"
#include <stdio.h>
JNIEXPORT void JNICALL Java_Hello_sayHello
(JNIEnv *env, jobject obj)
 printf("Hello world!\n");
 return;
}Makefile:
hello.dll : Hello.o Hello.def
 gcc -g -shared -Wl,--kill-at -o hello.dll Hello.o hello.def
Hello.o : Hello.c Hello.h
 gcc -c -g -I"$(JAVA_HOME)\include" -I"$(JAVA_HOME)\include\win32" Hello.c -o Hello.o
Hello.h : Hello.class
 javah -jni Hello
clean :
 rm Hello.h
 rm Hello.o
 rm hello.dllHello.def
EXPORTS
Java_Hello_sayHelloEverything goes well, but when I run java program it does nothin (it should print message, but it just exit without any error).I'm sure that it's something stupid, but I cant see what. Can anyone tell me what am I doing wrong?
Thenks.

Answer 1: yes, there was no problem. I compiled and started simple 'hello world' program from Cygwin and from WinXP console, and it worked well.
Answer 2: This is weird, I changed code to this:
Hello.java:
 public native int getInt();
 System.out.println("Returned int is " + h.getInt());Hello.c:
JNIEXPORT jint JNICALL Java_Hello_getInt
(JNIEnv *env, jobject obj)
 return 25;
}It does not print anything. I started this program from Cygwin and from WinXP console, and from Eclipse. Only if I debug in Eclipse (step by step) I get:
Returned int is 25and still I don't get Hello string printed (even if I go step by step). It looks like cygwin has some problem with OS. Do you have any idea what to do, I'm a bit confused?
Thank you.
Message was edited by:
zly

15 Seconds to Display "Hello World"?

I've just installed Flex Developer 3 on OS X 10.5.7 (2.4 GHz and 4 GB RAM). When I run the "Hello World" application from "A Beginner's Guide" by Davis and Phillips, it takes about 15 seconds to display "Hello World".
The result is the same when I'm using Firefox 3.5.1 or Safari 4.0.2.
When I export the project and run the html filebin-debug, I get a delay of about 11 seconds.
When I export the project and run the html file in bin-release, I get "Hello World" in about 1 second.
I also noticed a similar delay when opening database driven applications. The browser reads "Loading", I get the PWOD, and then the form appears.O Once the page loads and Flash displays, the application loads data very quickly (amazingly quickly!)
In contrast, when I FF 3.5.1 on XP SP3 under Fusion 2.0.5 and open the html files in debug and release, they load in 1 second.
Is there a patch to apply or something I need to set to get rid of the long delay on OS X?
Thanks in advance,
Douglas von Roeder

The solution was to right click on the application in the browser and stop it from connecting to a remote debugger.
I've been working on a few different applications which were data-driven apps, some of which were running on a remote machine. Hence the need to connect to a debugger on the hosted box.
Once I changed the debugger settings, the situation was solved.

How can I remove "Hello World!" from my browser menu bar

I just noticed there'e something in my brower menu bar that has never been there before. Next to the other menu options (File, Edit, View, History, etc.) appears the words"Hello World!". I know it wasn't there two weeks ago, and it's highly unlikely I would have missed seeing it a few days ago when I last did extensive browsing. In hopes of fixing the problem myself, I deleted the only two FF add-ons installed to my PC in the past month. I also ran a system restore to a point created 35 days ago. But "Hello World!" still remained in the menu bar. When I try clicking it on, nothing happens. I tried removing it by pressing the "Customize"option in the toolbar, but it "Hello World!" would not drag down from the menu bar. I was still running FF version 22.0., and when I saw that an update to FF 23.0 was available, I ran the update, but this did nothing the fix my issue (I'm currently back to FF22.0, due to the System Restore that I ran earlier). Finally, I went to both my "Program Files" folders, and sorted them using "Date Modified", to identify any programs changed or added in the past several weeks. There were only a few programs changed in this timespan, so I scoured all files within those few folders, but nothing stood out as unusual. CAn anyone tell me what this "Hello World!" is or why it is appearing in my menu bar? Most importantly, would anyone know how I can remove it permanently ? Following Firefox's instructions, I've created a Print Screen photo showing my brower toolbars, including the menu bar ( at the very top just above my address bar), so that you can see where "Hello World!" appears. Not sure yet how to attach the PrtScn photo to this question I'm about to submit, so if it doesn't make it to the forum with my question, I can send it to anyone who emails me a reply.
Thank You.

THis is a reply to my own question, so that I can upload the Print Screen image of my browser toolbar. Look for "Hello World!" at the top, just above my address bar. Thanks again to anyone who can help me remove this from my menu bar.

Error while running Hello World Page

Hi
I am getting the following error when I run the Hello World page from the Tutorial.
oracle.apps.fnd.framework.OAException: Application: FND, Message Name: SECURITY_APPL_LOGIN_FAILED.
## Detail 0 ##
oracle.apps.fnd.framework.OAException: Application: FND, Message Name: SECURITY_INVALID_DBC_PARAMETER. Tokens: ROUTINE = AppsConnectionManager.makeGuestConnection; FILE = D:\Jdeveloper\jdevhome\jdev\dbc_files\secure\test.dbc; PARAMETER = GUEST_USER_PWD;
## Detail 0 ##
oracle.apps.fnd.framework.OAException: Application: FND, Message Name: AOLJ_JAVA_EXCEPTION. Tokens: MESSAGE = Not able to create new database connection: FNDSECURITY_APPL_LOGIN_FAILED;
## Detail 0 ##
oracle.apps.fnd.framework.OAException: Application: FND, Message Name: FND_GENERIC_MESSAGE. Tokens: MESSAGE = oracle.apps.fnd.common.PoolException: Not able to create new database connection: FNDSECURITY_APPL_LOGIN_FAILED;
The DBC file is in place. After checking various posts I have confirmed details in the DBC file and they seem to be right.
Could someone please help me out here.
Regards
Deepak

http://oracleanil.blogspot.com/2010/11/how-to-test-or-create-dbc-file-on.html
Thanks
--Anil
http://oracleanil.blogspot.com

Error while running Hello world from Tutorial

Hi ,
I am facing a strange problem while running Hello world from tutorial. The page expires after running for half an hour and the log in the Jdeveloper is
[Starting OC4J using the following ports: HTTP=8988, RMI=23891, JMS=9227.]
C:\Jdev\jdevbin\jdk1.4.2\bin\javaw.exe -client -classpath C:\Jdev\jdevbin\j2ee\home\oc4j.jar;C:\Jdev\jdevbin\jdev\lib\jdev-oc4j.jar -Xbootclasspath/p:C:\Jdev\jdevbin\jdev\appslibrt\ojdbc14.jar;C:\Jdev\jdevbin\jdev\appslibrt\nls_charset12.zip -DRUN_FROM_JDEV=true -mx256m -Doracle.j2ee.dont.use.memory.archive=false -Xverify:none -Doracle.j2ee.dont.use.memory.archive=true -Doracle.j2ee.http.socket.timeout=500 com.evermind.server.OC4JServer -config C:\Jdev\jdevhome\jdev\system9.0.3.5.1312\oc4j-config\server.xml
[waiting for the server to complete its initialization...]
Ready message received from Oc4jNotifier.
Embedded OC4J startup time: 5782 ms.
Auto-deploying OA Framework web application deployment descriptor (New server version detected)...
Oracle9iAS (9.0.3.1.0) Containers for J2EE initialized
Tutalii: C:\Jdev\jdevbin\jdev\appslibrt\iasjoc.zip archive
[Feb 27, 2008 4:31:57 PM IST]:1204110117921:Thread[HttpRequestHandler-25086455,5,main]:-1:-1:sisatpat:9.182.220.120:-1:-1:UNEXPECTED:[fnd.common.logging.DebugEventManager.handlerException]:java.io.FileNotFoundException: C:\u01\VIS\FND.log (The system cannot find the path specified)
 at java.io.FileOutputStream.openAppend(Native Method)
 at java.io.FileOutputStream.<init>(FileOutputStream.java:177)
 at java.io.FileOutputStream.<init>(FileOutputStream.java:102)
 at oracle.apps.fnd.common.logging.FileHandleManager.getFileInternal(FileHandleManager.java:99)
 at oracle.apps.fnd.common.logging.FileHandler.<init>(FileHandler.java:99)
 at oracle.apps.fnd.common.logging.FileHandler.<init>(FileHandler.java:79)
 at oracle.apps.fnd.common.logging.DebugEventManager.registerHandlers(DebugEventManager.java:1198)
 at oracle.apps.fnd.common.logging.DebugEventManager.reInitialize(DebugEventManager.java:949)
 at oracle.apps.fnd.common.logging.DebugEventManager.reInitialize(DebugEventManager.java:907)
 at oracle.apps.fnd.common.AppsLog.reInitialize(AppsLog.java:570)
 at oracle.apps.fnd.common.AppsContext.initLog(AppsContext.java:1025)
 at oracle.apps.fnd.common.WebAppsContext.init(WebAppsContext.java:3486)
 at oracle.apps.fnd.common.WebAppsContext.<init>(WebAppsContext.java:537)
 at oracle.apps.jtf.base.resources.Architecture.createWebAppsContext(Architecture.java:429)
 at oracle.apps.jtf.base.resources.Architecture.createAppsContext(Architecture.java:422)
 at oracle.apps.jtf.base.resources.Architecture.createAppsContext(Architecture.java:330)
 at oracle.apps.jtf.cache.ArchitectureWrapper.createAppsContext(ArchitectureWrapper.java:90)
 at oracle.apps.jtf.cache.appsimpl.AppsCacheLogger.<clinit>(AppsCacheLogger.java:34)
 at oracle.apps.jtf.cache.appsimpl.AppsCacheEnvironment.getCacheLogger(AppsCacheEnvironment.java:67)
 at oracle.apps.jtf.cache.CacheManager.initCache(CacheManager.java:595)
 at oracle.apps.jtf.cache.CacheManager.<clinit>(CacheManager.java:364)
 at oracle.apps.jtf.cache.CacheAdmin.isComponentRegistered(CacheAdmin.java:314)
 at oracle.apps.fnd.cache.Cache.registerCacheIfNeeded(Cache.java:119)
 at oracle.apps.fnd.cache.Cache.initCache(Cache.java:110)
 at oracle.apps.fnd.cache.Cache.<init>(Cache.java:88)
 at oracle.apps.fnd.cache.AppsCache.<init>(AppsCache.java:87)
 at oracle.apps.fnd.profiles.Profiles.<clinit>(Profiles.java:280)
 at oracle.apps.fnd.profiles.ExtendedProfileStore.init(ExtendedProfileStore.java:482)
 at oracle.apps.fnd.profiles.ExtendedProfileStore.<init>(ExtendedProfileStore.java:113)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
 at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
 at oracle.apps.fnd.common.AppsContext.instantiateProfileStore(AppsContext.java:3834)
 at oracle.apps.fnd.common.AppsContext.makeProfileStore(AppsContext.java:942)
 at oracle.apps.fnd.common.Context.setProfileStore(Context.java:825)
 at oracle.apps.fnd.common.Context.setProfileStore(Context.java:807)
 at oracle.apps.fnd.common.WebAppsContext.init(WebAppsContext.java:3484)
 at oracle.apps.fnd.common.WebAppsContext.<init>(WebAppsContext.java:537)
 at oracle.apps.fnd.framework.server.OAUtility.getWebAppsContext(OAUtility.java:346)
 at oracle.apps.fnd.framework.CreateIcxSession.getEncryptedSessId(CreateIcxSession.java:144)
 at oracle.apps.fnd.framework.CreateIcxSession.createSession(CreateIcxSession.java:80)
 at test_fwktutorial._jspService(test_fwktutorial.jsp:45)
 at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java:139)
 at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:317)
 at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:465)
 at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:379)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:727)
 at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:306)
 at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:767)
 at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:259)
 at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:106)
 at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:797)
 at java.lang.Thread.run(Thread.java:534)
[Feb 27, 2008 4:31:57 PM IST]:1204110117890:Thread[HttpRequestHandler-25086455,5,main]:-1:-1:sisatpat:9.182.220.120:-1:-1:UNEXPECTED:[fnd.common.logging.FileHandler.publish]:Please check File Permission/Disk Space for: /u01/VIS/FND.log, defaulting Logging to STDERR
Can any one help!!
Thanks,
Sid..

Sid,
1) Check your using the correct version of Jdev with your instance.
Metalink note 416708.1 - How to find the correct version of JDeveloper to use with eBusiness Suite 11i or Release 12
Will give the mappings.
And check the Jdev setting
330236.1 - Configuring JDeveloper For Use With Oracle Applications 11i and R12
2) Instead of using the tutorial, create a sample page, Am and run the page.
Check what error you are getting.
Thanks.
With Regards,
Kali.
OSSI.

Cookie error while running Hello World

Hi,
When i run test_fwklabsolutions.jsp, i get the page where there are links named Hello World, Home etc.
But when i click on one of the link, i get this message
"You have encountered an unexpected error. Please contact the System Administrator for assistance.
Click here for exception details. "
When I click on the link "Click here for exceptions:" a blank page is displayed.
In the debugger window of jDeveloper, i get the following message :
"ICX DIAGNOSTIC: FND_TOP = D:\Jdeveloper\jdevhome\jdev\myhtml\OA_HTML\
ICX DIAGNOSTIC: application_id = 601
ICX DIAGNOSTIC: responsibility_id = 24743
ICX DIAGNOSTIC: security_group_id = 0
ICX DIAGNOSTIC: mEncryptedSessionID = onhyPf0XCy7zyEvfbWKZOkVT:S
ICX DIAGNOSTIC: mSessionID = 298494531
ICX DIAGNOSTIC: mTransactionID = 774968588
java.lang.NullPointerException
     at oracle.apps.fnd.common.WebRequestUtil.getCookieValue(WebRequestUtil.java:130)
     at oracle.apps.fnd.common.WebRequestUtil.getSessionCookie(WebRequestUtil.java:622)
     at oracle.apps.fnd.framework.webui.OAJSPHelper.getIcxCookie(OAJSPHelper.java:274)
     at oracle.apps.fnd.framework.webui.OAJSPHelper.getIcxCookie(OAJSPHelper.java:239)
     at oracle.apps.fnd.framework.webui.OAServerDelegate.getIcxSessionContext(OAServerDelegate.java:423)
     at oracle.apps.fnd.framework.webui.OAJSPHelper.handleErrorStackDisplay(OAJSPHelper.java:1306)
     at _OAErrorPage._jspService(OAErrorPage.jsp:68)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:317)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:465)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:379)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:727)
     at com.evermind.server.http.ServletRequestDispatcher.include(ServletRequestDispatcher.java:119)
     at com.evermind.server.http.EvermindPageContext.handlePageThrowable(EvermindPageContext.java:547)
     at com.evermind.server.http.EvermindPageContext.handlePageException(EvermindPageContext.java:518)
     at _OA._jspService(OA.jsp:35)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:317)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:465)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:379)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:727)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:306)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:767)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:259)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:106)
     at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:803)
     at java.lang.Thread.run(Thread.java:534)
Any idea where I am going wrong.
-Debojyoty

Sid,
1) Check your using the correct version of Jdev with your instance.
Metalink note 416708.1 - How to find the correct version of JDeveloper to use with eBusiness Suite 11i or Release 12
Will give the mappings.
And check the Jdev setting
330236.1 - Configuring JDeveloper For Use With Oracle Applications 11i and R12
2) Instead of using the tutorial, create a sample page, Am and run the page.
Check what error you are getting.
Thanks.
With Regards,
Kali.
OSSI.

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