Java Swing Applets in Mac Os
hi there,
I am a student at the University of Portsmouth in the UK in my third and last year. I am doing my dissertation as a game using applets for a client at the university of which there consits four prototypes. One of the main specification points is that it should work on an apple mac, therefore I am using Swing applets. however with my first prototype it works fine on windows in windows Explorer, firefox and Netscape but i cant get it to work on Mac os 9 or X even with the latest version of java installed on the machine. Can anyone tell me why this is so, I would be very gratefull.
As I cant post the whole applet here as a file download I will just put some code snippets of the main program classes.
Applet ------------------------------
* Class JugglingBalls - A sub class of JApplet that combines the GameInterface and GamePanel into a single application
* @author (Liam Morren)
* @version (v1.0)
import java.awt.*;
import javax.swing.*;
public class JugglingBalls extends JApplet
// instance variables -----------------------------------------------------------------------------------------------------------------------------------
private GamePanel gamePanel; // The game panel including game and render loop
private GameInterface gameInterface; // The swing interface to modify the game scene components
// JApplet methods -------------------------------------------------------------------------------------------------------------------------------------
* Called by the browser or applet viewer to inform this JApplet that it
* has been loaded into the system. It is always called before the first
* time that the start method is called.
public void init()
gamePanel = new GamePanel();
gameInterface = new GameInterface(gamePanel.getGameScene());
Container content = getContentPane(); // The container for components in the applet
setLayout(new BoxLayout(content, BoxLayout.X_AXIS));
content.add(gamePanel);
content.add(gameInterface);
* Returns information about this applet.
* An applet should override this method to return a String containing
* information about the author, version, and copyright of the JApplet.
* @return a String representation of information about this JApplet
public String getAppletInfo()
// provide information about the applet
return "Title: JugglingBalls \nAuthor: Liam Morren \nA simple application showing balls juggling in the air.";
Interface -------------------------------------
* Class GameInterface - Lets you manipulate the game components using swing components
* @author (Liam Morren)
* @version (v1.0)
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
public class GameInterface extends JPanel
// instance variables -------------------------------------------------------------------------------------------------------------------------------------
private GameScene gameScene; // Reference to the game scene
private JTabbedPane gameTabs; // Tabs for Game, Balls and Background
// Scene panel
JButton pause, start, reset; // Buttons
// Balls panel
JRadioButton redBall, greenBall, blueBall, archBall, figureOfEightBall; // Radio buttons
JCheckBox canSplit; // Check box
JComboBox setAllPaths, setAllTypes, newBall, selectBall; // Drop down boxes
JButton deleteBall; // Button
Ball currentBall; // Current ball being changed
// Background panel
JRadioButton black, white, red, green, blue, hide, show, stop, move, arch, figureOfEight; // Radio buttons
// Constructors -------------------------------------------------------------------------------------------------------------------------------------------
* Constructor for objects of class GameInterface
public GameInterface(GameScene gameSceneIn)
gameScene = gameSceneIn; // Reference to the game scene
gameTabs = new JTabbedPane(); // JTabbedPane to hold different toolbars
gameTabs.setPreferredSize(new Dimension(200, 494)); // Set the preffered size for the tabbed pane
currentBall = gameScene.getBall(0); // First ball
// Add the panels to the tabbed pane
gameTabs.addTab("Scene", makeScenePanel());
gameTabs.addTab("Balls", makeBallsPanel());
gameTabs.addTab("Background", makeBackgroundPanel());
add(gameTabs); // Add the tab to the game interface panel
setPreferredSize(new Dimension(200, 200));
// Other methods ------------------------------------------------------------------------------------------------------------------------------------------
* makeScenePanel
* @return JPanel - The scene panel with buttons added
private JPanel makeScenePanel()
// Make scene panel
JPanel scenePanel = new JPanel();
scenePanel.setLayout(new BoxLayout(scenePanel, BoxLayout.Y_AXIS)); // Change layout
pause = new JButton("Pause"); // Make buttons
start = new JButton("Start");
reset = new JButton("Reset");
// Add button actions
pause.addActionListener(new ActionListener() // Add button listener to pause button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.setPaused(true); // Pause game
start.addActionListener(new ActionListener() // Add button listener to start button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.setPaused(false); // Unpause game
reset.addActionListener(new ActionListener() // Add button listener to reset button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.reset(); // Reset game
updateSelectBallComboBox();
changeSelectedBall(0);
scenePanel.add(pause); // Add buttons to scene panel
scenePanel.add(start);
scenePanel.add(reset);
return scenePanel;
* makeBackgroundPanel
* @return JPanel - The background panel with buttons added
private JPanel makeBackgroundPanel()
// Make scene panel
JPanel backgroundPanel = new JPanel();
backgroundPanel.setLayout(new GridLayout(5, 1, 2, 2)); // Change layout
// Make buttons
// background colour buttons
JPanel backgroundcolour = new JPanel(); // Change backgroundcolour panel
backgroundcolour.setBorder(BorderFactory.createLineBorder(Color.black));
black = new JRadioButton("Black"); // Radio buttons to change colour
white = new JRadioButton("white");
black.setSelected(true); // Set black as already selected
ButtonGroup backColourGroup = new ButtonGroup(); // Group buttons so only one can be pressed at a time
backColourGroup.add(black); // Add buttons to group
backColourGroup.add(white);
backgroundcolour.setLayout(new GridLayout(2, 2, 0, 0)); // Change layout
backgroundcolour.add(new JLabel("Background colour")); // Add label
backgroundcolour.add(black); // Add buttons to colours panel
backgroundcolour.add(white);
// Add radio button actions
black.addActionListener(new ActionListener() // Add button listener to black button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.setBackgroundColour(false); // Background colour = black
white.addActionListener(new ActionListener() // Add button listener to white button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.setBackgroundColour(true); // Background colour = white
// colour buttons
JPanel colours = new JPanel(); // Change colours panel
colours.setBorder(BorderFactory.createLineBorder(Color.black));
red = new JRadioButton("Red"); // Radio buttons to change colour
green = new JRadioButton("Green");
green.setSelected(true); // Set green as already selected
blue = new JRadioButton("Blue");
ButtonGroup colourGroup = new ButtonGroup(); // Group buttons so only one can be pressed at a time
colourGroup.add(red); // Add buttons to group
colourGroup.add(green);
colourGroup.add(blue);
colours.setLayout(new GridLayout(2, 2, 0, 0)); // Change layout
colours.add(new JLabel("Change colours")); // Add label
colours.add(red); // Add buttons to colours panel
colours.add(green);
colours.add(blue);
// Add radio button actions
red.addActionListener(new ActionListener() // Add button listener to red button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
if (gameScene.getBackgroundEffect().getColour() != 0)
gameScene.getBackgroundEffect().setColour(0); // Background effect colour = red
green.addActionListener(new ActionListener() // Add button listener to green button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
if (gameScene.getBackgroundEffect().getColour() != 1)
gameScene.getBackgroundEffect().setColour(1); // Background effect colour = green
blue.addActionListener(new ActionListener() // Add button listener to blue button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
if (gameScene.getBackgroundEffect().getColour() != 2)
gameScene.getBackgroundEffect().setColour(2); // Background effect colour = blue
// hide buttons
JPanel hideShow = new JPanel(); // Change hideShow panel
hideShow.setBorder(BorderFactory.createLineBorder(Color.black));
hide = new JRadioButton("Hide"); // Radio buttons to hide show
show = new JRadioButton("Show");
show.setSelected(true); // Set show as already selected
ButtonGroup hideShowGroup = new ButtonGroup(); // Group buttons so only one can be pressed at a time
hideShowGroup.add(hide); // Add buttons to group
hideShowGroup.add(show);
hideShow.setLayout(new GridLayout(2, 2, 0, 0)); // Change layout
hideShow.add(new JLabel("Hide / Show")); // Add label
hideShow.add(hide); // Add buttons to hideShow panel
hideShow.add(show);
// Add radio button actions
hide.addActionListener(new ActionListener() // Add button listener to hide button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.getBackgroundEffect().hide(); // Hide
show.addActionListener(new ActionListener() // Add button listener to show button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.getBackgroundEffect().unHide(); // Unhide
// stopMove buttons
JPanel stopMove = new JPanel(); // Change StopMove panel
stopMove.setBorder(BorderFactory.createLineBorder(Color.black));
stop = new JRadioButton("Stop"); // Radio buttons to stop move
move = new JRadioButton("Move");
stop.setSelected(true); // Set stop as already selected
ButtonGroup stopMoveGroup = new ButtonGroup(); // Group buttons so only one can be pressed at a time
stopMoveGroup.add(stop); // Add buttons to group
stopMoveGroup.add(move);
stopMove.setLayout(new GridLayout(2, 2, 0, 0)); // Change layout
stopMove.add(new JLabel("Stop / Move")); // Add label
stopMove.add(stop); // Add buttons to stopMove panel
stopMove.add(move);
// Add radio button actions
stop.addActionListener(new ActionListener() // Add button listener to stop button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.getBackgroundEffect().setMove(false); // stop
move.addActionListener(new ActionListener() // Add button listener to move button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.getBackgroundEffect().setMove(true); // move
// changePath buttons
JPanel changePath = new JPanel(); // Change changePath panel
changePath.setBorder(BorderFactory.createLineBorder(Color.black));
arch = new JRadioButton("Arch"); // Radio buttons to change path
figureOfEight = new JRadioButton("Figure of eight");
arch.setSelected(true); // Set stop as already selected
ButtonGroup changePathGroup = new ButtonGroup(); // Group buttons so only one can be pressed at a time
changePathGroup.add(arch); // Add buttons to group
changePathGroup.add(figureOfEight);
changePath.setLayout(new GridLayout(2, 2, 0, 0)); // Change layout
changePath.add(new JLabel("Change Path")); // Add label
changePath.add(arch); // Add buttons to changePath panel
changePath.add(figureOfEight);
// Add radio button actions
arch.addActionListener(new ActionListener() // Add button listener to arch button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.getBackgroundEffect().setPath(new Arch()); // Arch
figureOfEight.addActionListener(new ActionListener() // Add button listener to figureOfEight button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
gameScene.getBackgroundEffect().setPath(new FigureOfEight()); // Figure of eight
// Add components to background panel
backgroundPanel.add(backgroundcolour);
backgroundPanel.add(colours);
backgroundPanel.add(hideShow);
backgroundPanel.add(stopMove);
backgroundPanel.add(changePath);
return backgroundPanel;
* makeBallsPanel
* @return JPanel - The ball panel with buttons added
private JPanel makeBallsPanel()
// Make balls panel
JPanel ballsPanel = new JPanel();
ballsPanel.setLayout(new BoxLayout(ballsPanel, BoxLayout.Y_AXIS)); // Change layout
// Make buttons
// set all drop down boxes
JPanel setAll = new JPanel(); // Set all panel
setAll.setBorder(BorderFactory.createLineBorder(Color.black));
String[] setAllPathsChoices = {"Arch", "Figure of eight"}; // Selections for set all paths
setAllPaths = new JComboBox(setAllPathsChoices); // Add selections to combo box
String[] setAllTypesChoices = {"Primary ball", "Pastel ball", "3D ball", "Image ball"}; // Selections for set all types
setAllTypes = new JComboBox(setAllTypesChoices); // Add selections to combo box
setAll.add(new JLabel("Set all paths")); // Add combo boxes to set all panel
setAll.add(setAllPaths);
setAll.add(new JLabel("Set all types"));
setAll.add(setAllTypes);
// Add combo box actions
setAllPaths.addActionListener(new ActionListener() // Add selection listener to set all paths combo box
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
if (setAllPaths.getSelectedItem() == "Arch")
gameScene.setAllPathsArch();
else
gameScene.setAllPathsFigureOfEight();
setAllTypes.addActionListener(new ActionListener() // Add selection listener to set all types combo box
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
if (setAllTypes.getSelectedItem() == "Primary ball")
gameScene.setAllTypesPrimaryBall();
else if (setAllTypes.getSelectedItem() == "Pastel ball")
gameScene.setAllTypesPastelBall();
else if (setAllTypes.getSelectedItem() == "Image ball")
gameScene.setAllTypesImageBall();
else
gameScene.setAllTypesBall3D();
// new ball drop down box
JPanel newBallPanel = new JPanel(); // new ball panel
newBallPanel.setBorder(BorderFactory.createLineBorder(Color.black));
String[] newType = {"Primary ball", "Pastel ball", "3D ball", "Image ball"}; // Selections for new ball
newBall = new JComboBox(newType); // Add selections to combo box
newBallPanel.add(new JLabel("New ball")); // Add combo boxes to new ball panel
newBallPanel.add(newBall);
// Add combo box actions
newBall.addActionListener(new ActionListener() // Add selection listener to newBall combo box
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
String ballType = (String) newBall.getSelectedItem();
if (ballType == "Primary ball")
gameScene.addBall(new PrimaryBall(gameScene));
else if (ballType == "Pastel ball")
gameScene.addBall(new PastelBall(gameScene));
else if (ballType == "Image ball")
gameScene.addBall(new ImageBall(gameScene));
else
gameScene.addBall(new Ball3D(gameScene));
updateSelectBallComboBox();
changeSelectedBall(gameScene.getBalls().size() - 1); // Update interface to show new ball
// selected ball panel
JPanel selectedBallPanel = new JPanel(); // selected ball panel
selectedBallPanel.setBorder(BorderFactory.createLineBorder(Color.black));
// Select ball
selectBall = new JComboBox(gameScene.getBallList()); // Add ball list to the select drop down box
deleteBall = new JButton("DeleteBall"); // Delete button
// Ball colour
redBall = new JRadioButton("Red"); // Red choice
redBall.setSelected(true); // Start as selected
greenBall = new JRadioButton("Green"); // Green choice
blueBall = new JRadioButton("Blue"); // Blue choice
ButtonGroup ballColour = new ButtonGroup(); // So only one colour can be selected at a tim
ballColour.add(redBall);
ballColour.add(greenBall);
ballColour.add(blueBall);
// Path
archBall = new JRadioButton("Arch"); // Arch path choice
archBall.setSelected(true); // Start as selected
figureOfEightBall = new JRadioButton("Figure of eight"); // Figure of eight path choice
ButtonGroup ballPath = new ButtonGroup(); // So only one path can be selected at a tim
ballPath.add(archBall);
ballPath.add(figureOfEightBall);
// Can split
canSplit = new JCheckBox("Can split", false); // Initialy not selected
selectedBallPanel.add(new JLabel("Select ball")); // Add components to selected ball panel
selectedBallPanel.add(selectBall);
selectedBallPanel.add(deleteBall);
selectedBallPanel.add(new JLabel("Ball colour"));
selectedBallPanel.add(redBall);
selectedBallPanel.add(greenBall);
selectedBallPanel.add(blueBall);
selectedBallPanel.add(new JLabel("Path"));
selectedBallPanel.add(archBall);
selectedBallPanel.add(figureOfEightBall);
selectedBallPanel.add(canSplit);
// Add select ball drop down box action
selectBall.addActionListener(new ActionListener() // Add selection listener to selectBall combo box
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
changeSelectedBall(selectBall.getSelectedIndex()); // Change the selected ball using the index from the select ball drop down box
// Add delete button action
deleteBall.addActionListener(new ActionListener() // Add selection listener to deleteBall button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
int tempIndex = selectBall.getSelectedIndex(); // Temp index
if (gameScene.getBalls().size() > 1) // If there is more than 1 ball left
gameScene.removeBall(tempIndex); // Remove ball
updateSelectBallComboBox(); // Update with new ball list
changeSelectedBall(tempIndex - 1); // Update interface with new current selected ball
// Add radio button colour actions
redBall.addActionListener(new ActionListener() // Add button listener to redBall button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
if (currentBall.getColour() != 0)
currentBall.setColour(0); // currentBall colour = red
greenBall.addActionListener(new ActionListener() // Add button listener to greenBall button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
if (currentBall.getColour() != 1)
currentBall.setColour(1); // currentBall colour = green
blueBall.addActionListener(new ActionListener() // Add button listener to blueBall button
public void actionPerformed(ActionEvent ev) // Background colour = blue
if (currentBall.getColour() != 2)
currentBall.setColour(2); // currentBall colour = blue
// Add path radio button actions
archBall.addActionListener(new ActionListener() // Add button listener to arch button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
currentBall.setPath(new Arch()); // Arch
figureOfEightBall.addActionListener(new ActionListener() // Add button listener to figureOfEight button
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
currentBall.setPath(new FigureOfEight()); // Figure of eight
// Add can split check button actions
canSplit.addActionListener(new ActionListener() // Add button listener to can split
public void actionPerformed(ActionEvent ev) // Overide actionPerformed() method
currentBall.setCanGiveBirth(canSplit.isSelected()); // Ball can split if can split check button is selected
// Add components to ball panel
ballsPanel.add(setAll);
ballsPanel.add(newBallPanel);
ballsPanel.add(selectedBallPanel);
return ballsPanel;
* changeSelectedBall
* @param ballIndexIn - The numbered index of the ball in the game scene list of balls. If less than 0 then equals 0. If more than ball list size then equals last ball
public void changeSelectedBall(int ballIndexIn)
if (ballIndexIn < 0) // Make sure index is within bounds
ballIndexIn = 0;
else if (ballIndexIn >= gameScene.getBalls().size())
ballIndexIn = gameScene.getBalls().size() - 1; // Else put within bounds at either end
currentBall.highlight(false); // Unhighlight current ball
currentBall = gameScene.getBall(ballIndexIn); // Get new current ball
currentBall.highlight(true); // Highlight new current ball
// Update controls to new ball
selectBall.setSelectedIndex(ballIndexIn);
switch (currentBall.getColour()) // Update colour controls
case 0: redBall.setSelected(true); break;
case 1: greenBall.setSelected(true); break;
default: blueBall.setSelected(true); break;
if (currentBall.getPath() instanceof Arch) // If path is arch
archBall.setSelected(true); // Update controls as arch
else
figureOfEightBall.setSelected(true); // Else figure of eight
canSplit.setSelected(currentBall.canGiveBirth()); // Set if the ball can split or not
* updateSelectBallComboBox
* This method updates the combo box selection model with a new one made from the updated balls arraylist from the game scene
public void updateSelectBallComboBox()
DefaultComboBoxModel model = new DefaultComboBoxModel(gameScene.getBallList());
selectBall.setModel(model);
}Kind regards
Liam morren
http://docs.info.apple.com/article.html?artnum=301073
This link states Mac OS X 10.4 now supports Java 5.0. It does mention nothing about Mac OS 9 or previous version of OS X. The problem you may be facing is that your Mac is running only 1.4.2 or less. The class files compiled for Java 5.0 can't run in non 5.0 versions of the Java Virtual Machine. Java 5.0 was a major release for the Java language and thus the change in numbering (though it took a little bit for this to change).
Anyway you should confirm what version of Java you have installed on your Mac.
At a command prompt:
java -version
The above URL states that the previous 1.4.2 Java version is not uninstalled, and this could still be the preferred version to use for Java applications even after installing Java 5.0.
The URL above states there is a utility to set your apps to use Java 5.0 as the perferred Java version. Who knows maybe this is all you need to do. I hope this is the case, then it probably is an easy fix, otherwise you may need to rewrite your app in Java 1.4.2 to get it to run on your version of Mac.
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http://www-106.ibm.com/developerworks/library/j-leaks/ -
PL/SQL and Java Swing interface
Everybody in this forum knows that Oracle is the best database around
with many functionalities, stability, performance, etc. We also know
that PL/SQL is a great language to manipulate information directly
in the database with many built in functions, OOP capability,
transaction control, among other features. Today an application that
manipulates information, which needs user interface, requires components
to be developed using different technologies and normally running in
different servers or machines. For example, the interface is done using
a dynamic HTML generator like JSP, PHP, PL/SQL Web Toolkit, etc.
This page is executed in an application server like Oracle iAS or
Tomcat, just to name two, which in turn access a database like Oracle to
build the HTML. Also rich clients like Java applets require an intermediate
server to access the database (through servlets for example) although
it is possible to access the database directly but with security issues.
Another problem with this is that complexity increases a lot, many
technologies, skills and places to maintain code which leads to a greater
failure probability. Also, an application is constantly evolving, new
calculations are added, new tables, changed columns. If you have an
application with product code for example and you need to increase its
size, you need to change it in the database, search for all occurrences
of it in the middle-tier code and perhaps adjust interfaces. Normally
there is no direct dependency among the tier components. On another
issue, many application interfaces today are based on HTML which doesn't
have interactive capabilities like rich-client interfaces. Although it
is possible to simulate many GUI widgets with JavaScript and DHTML, it is
far from the interactive level we can accomplish in rich clients like
Java Swing, Flash MX, Win32, etc. HTML is also a "tag-based" language
originally created to publish documents so even small pages require
many bytes to be transmitted, far beyond of what we see on the screen.
Even in fast networks you have a delay time to wait the page to be
loaded. Another issue, the database is in general the central location
for all kinds of data. Most applications relies on it for security,
transaction and availability. My proposal is to use Oracle as the
central location for interface, processing and data. With this approach
we can create not only the data manipulation procedures in the database,
but procedures that also control and manage user interfaces. Having
a Oracle database as the central location for all components has many
advantages:
- Unique point of maintenance, backup and restore
- Integrated database security
- One language for everything, PL/SQL or Java (even both if desired)
- Inherited database cache, transaction and processing optimizations
- Direct access to the database dictionary
- Application runs on Oracle which has support for many platforms.
- Transparent use of parallel processing, clusters and future
background technologies
Regarding the interface, I already created a Java applet renderer
which receives instructions from the database on how to create GUI
objects and how to respond to events. The applet is only 8kb and can
render any Swing or AWT object/event. The communication is done
through HTTP or HTTPS using Oracles's MOD_PLSQL included in the Apache
HTTP server which comes with the database or application server (iAS).
I am also creating a database framework and APIs in PL/SQL to
create and manipulate the client interface. The applet startup is
very fast because it is very small, you don't need to download large
classes with the client interface. Execution is done "on-demand"
according to instructions received from the database. The instructions
are very optimized in terms of network bandwidth and based on preliminary
tests it can be up to 1/10 of a similar HTML screen. Less network usage
means faster response and means that even low speed connections will
have a good performance (a future development can be to use this in
wireless devices like PDAs e even cell phones, just an idea for now).
The applet can also be executed standalone by using Java Web Start.
With this approach no business code, except the interface, is executed
on the client. This means that alterations in the application are
dynamically reflected in the client, no need to "re-download" the
application. Events are transmitted when required only so network
usage is minimized. It is also possible to establish triggering
events to further reduce network usage. Since the protocol used is
HTTP (which is stateless), the database framework I am creating will
be responsible to maintain the state of connections, variables, locks
and session information, so the developer don't need to worry about it.
The framework will have many layers, from communication up to
application so there will be pre-built functions to handle queries,
pagination, lock, mail, log, etc. The final objective is to have a
rich client application integrated into the database with minimum
programming and maintenance requirements, not forgetting customization
capabilities. Below is a very small example of what can de done. A
desktop with two windows, each window with two fields, a button with an
image to switch the values, and events to convert the typed text when
leaving the field or double-clicking it. The "leave" event also has an
optimization to only be triggered when the text changes. I am still
developing the framework and adjusting the renderer but I think that all
technical barriers were transposed by now. The framework is still in
the early stages, my guess is that only 5% is done so far. As a future
development even an IDE can be created so we have a graphical environment
do develop applications. I am willing to share this with the PL/SQL
community and listen to ideas and comments.
Example:
create or replace procedure demo1 (
jre_version in varchar2 := '1.4.2_01',
debug_info in varchar2 := 'false',
compress_buffer in varchar2 := 'false',
optimize_buffer in varchar2 := 'true'
) as
begin
interface.initialize('demo1_init','JGR Demo 1',jre_version,debug_info,compress_buffer,optimize_buffer);
end;
create or replace procedure demo1_init as
begin
toolkit.initialize;
toolkit.create_icon('icon',interface.global_root_url||'img/switch.gif');
toolkit.create_internal_frame('frame1','Frame 1',50,50,300,136);
toolkit.create_label('frame1label1','frame1',10,10,50,20,'Field 1');
toolkit.create_label('frame1label2','frame1',10,40,50,20,'Field 2');
toolkit.create_text_field('frame1field1','frame1',50,10,230,20,'Field 1','Field 1',focus_event=>true,mouse_event=>true);
toolkit.create_text_field('frame1field2','frame1',50,40,230,20,'Field 2','Field 2',focus_event=>true,mouse_event=>true);
toolkit.set_text_field_event('frame1field1',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 1','false');
toolkit.set_text_field_event('frame1field2',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 2','false');
toolkit.set_text_field_event('frame1field1',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 1','false');
toolkit.set_text_field_event('frame1field2',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 2','false');
toolkit.create_button('button1','frame1',10,70,100,25,'Switch','Switch the values of "Field 1" and "Field 2"','S','icon');
toolkit.set_button_event('button1',toolkit.action_performed_event,'demo1_switch_fields(''frame1field1'',''frame1field2'')','frame1field1:'||toolkit.get_text_method||',frame1field2:'||toolkit.get_text_method);
toolkit.create_internal_frame('frame2','Frame 2',100,100,300,136);
toolkit.create_label('frame2label1','frame2',10,10,50,20,'Field 1');
toolkit.create_label('frame2label2','frame2',10,40,50,20,'Field 2');
toolkit.create_text_field('frame2field1','frame2',50,10,230,20,'Field 1','Field 1',focus_event=>true,mouse_event=>true);
toolkit.create_text_field('frame2field2','frame2',50,40,230,20,'Field 2','Field 2',focus_event=>true,mouse_event=>true);
toolkit.set_text_field_event('frame2field1',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 1','false');
toolkit.set_text_field_event('frame2field2',toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,'FIELD 2','false');
toolkit.set_text_field_event('frame2field1',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 1','false');
toolkit.set_text_field_event('frame2field2',toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,'field 2','false');
toolkit.create_button('button2','frame2',10,70,100,25,'Switch','Switch the values of "Field 1" and "Field 2"','S','icon');
toolkit.set_button_event('button2',toolkit.action_performed_event,'demo1_switch_fields(''frame2field1'',''frame2field2'')','frame2field1:'||toolkit.get_text_method||',frame2field2:'||toolkit.get_text_method);
end;
create or replace procedure demo1_set_upper as
begin
toolkit.set_string_method(interface.global_object_name,toolkit.set_text_method,upper(interface.array_event_value(1)));
toolkit.set_text_field_event(interface.global_object_name,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(1)),'false');
end;
create or replace procedure demo1_set_lower as
begin
toolkit.set_string_method(interface.global_object_name,toolkit.set_text_method,lower(interface.array_event_value(1)));
toolkit.set_text_field_event(interface.global_object_name,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(1)),'false');
end;
create or replace procedure demo1_switch_fields (
field1 in varchar2,
field2 in varchar2
) as
begin
toolkit.set_string_method(field1,toolkit.set_text_method,interface.array_event_value(2));
toolkit.set_string_method(field2,toolkit.set_text_method,interface.array_event_value(1));
toolkit.set_text_field_event(field1,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(2)),'false');
toolkit.set_text_field_event(field2,toolkit.focus_lost_event,'demo1_set_upper',toolkit.get_text_method,upper(interface.array_event_value(1)),'false');
toolkit.set_text_field_event(field1,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(2)),'false');
toolkit.set_text_field_event(field2,toolkit.mouse_double_clicked_event,'demo1_set_lower',toolkit.get_text_method,lower(interface.array_event_value(1)),'false');
end;Is it sound like Oracle Portal?
But you want to save a layer 9iAS.
Basically, that was the WebDB.(Oracle changed the name to Portal when version 3.0)
Over all, I agree with you.
>>Having a Oracle database as the central location for all components has many
>>advantages:
>>
>>- Unique point of maintenance, backup and restore
>>- Integrated database security
>>- One language for everything, PL/SQL or Java (even both if desired)
>>- Inherited database cache, transaction and processing optimizations
>>- Direct access to the database dictionary
>>- Application runs on Oracle which has support for many platforms.
>>- Transparent use of parallel processing, clusters and future
>>background technologies
I would like to build 'ZOPE' inside Oracle DB as a back-end
Using Flash MX as front-end.
Thomas Ku. -
Unable to download images in a swing applet (1.3.1) behind proxy
Hi
One of my client have a proxy server and firewall and when they try to access my webserver
then all the AWT applet are downloaded and rendered on client properly. However, the swing applet written
using JDK 1.3.1 is downloaded and rendered but it doesn't display anything properly as images
are not down loaded. I have used media tracker to add images to it like oMediaTracker.addImage( oImage, index );
and then oMediaTracker.waitForAll();
Java console display at client looks as follows:
Java(TM) Plug-in: Version 1.3.1
Using JRE version 1.3.1 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\toy
Proxy Configuration: no proxy
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
q: hide console
s: dump system properties
t: dump thread list
x: clear classloader cache
0-5: set trace level to <n>
Applet Initialization start...
Applet Image Initialization start...
Trace level set to 5: basic, net, security, ext, liveconnect ... completed.
Opening http:MyServer/24/x.gif
Connecting http:MyServer/24/x.gif with no proxy
Connecting
http:MyServer/24/x.gif with cookie "ASPSESSIONIDGQGQQVWC=DLNBDAOABFANEPJFFIGOOIPG;
JSESSIONID=25Ais2tF1eBkevUhAa2akocfShzNdzyL7yC1I7UhJl7Z6BLZrnQK!
-1149265879"
Opening http:MyServer/40/y.gif
Connecting http:MyServer/40/y.gif with no proxy
Connecting http:MyServer/40/y.gif with cookie "ASPSESSIONIDGQGQQVWC=DLNBDAOABFANEPJFFIGOOIPG;
JSESSIONID=25Ais2tF1eBkevUhAa2akocfShzNdzyL7yC1I7UhJl7Z6BLZrnQK!
-1149265879"
Opening http://MyServer/sun/beans/infos/PanelBeanInfo.class
Connecting http://MyServer/sun/beans/infos/PanelBeanInfo.class with no proxy
Connecting http://MyServer/sun/beans/infos/PanelBeanInfo.class with cookie "ASPSESSIONIDGQGQQVWC=DLNBDAOABFANEPJFFIGOOIPG;
JSESSIONID=25Ais2tF1eBkevUhAa2akocfShzNdzyL7yC1I7UhJl7Z6BLZrnQK!
-1149265879"
Opening http://MyServer/java/awt/ContainerBeanInfo.class
Connecting http://MyServer/java/awt/ContainerBeanInfo.class with no proxy
Connecting http://MyServer/java/awt/ContainerBeanInfo.class
Client machine tries to access these images but i never receive a call at web server end when i see
IIS log.
CLient environment:
-Windows 2000/XP/NT
-Internet explorer 6.0 SP1 or IE 5.5 SP2
with connection->LAN Setting->Use Automatic configuration script(only checked)
-Java Plugin configured like proxies->Use Browser Setting
-JDK 1.3.1 plug in at client(downloaded and Installed automatically on demand)
-Object tag used to download applet and plugin
-Firewall and proxy(i don't know about vendor)
My webserver environment
Windows 2000/iis 5.0 with anonymous authentication and
cache-control header set to no-store (so that proxy doesn't cache anything)
QUESTIONS:
~~~~~~~~~
Q.1. When i try from home network that has a proxy then everything works fine. At client site everything except
image download works fine. I mean jars are downloaded and i can see anything drawn using JAVA API.
When i try from home i see following java console trace
Java(TM) Plug-in: Version 1.3.1
Using JRE version 1.3.1 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\wuko
Proxy Configuration: Automatic Proxy Configuration
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
q: hide console
s: dump system properties
t: dump thread list
x: clear classloader cache
0-5: set trace level to <n>
Trace level set to 5: basic, net, security, ext, liveconnect ... completed.
Applet Initialization start...
Applet Image Initialization start...
Opening http://MyServer/24/connec.gif
Connecting http://MyServer/24/connec.gif with proxy=197.168.1.100:808
Connecting http://MyServer/24/connec.gif with cookie "ASPSESSIONIDQQGQQCYU=GBJFAOABCJFPDMGFHEKLDACA; JSESSIONID=26yu5m1b4upVuXoAoDmtMbWXQmetQpyzqjFANszo9vFubujT4qGX!-1149265879"
Opening http://MyServer/24/cool.gif
Connecting http://MyServer/24/cool.gif with proxy=197.168.1.100:808
Connecting http://MyServer/24/cool.gif with cookie "ASPSESSIONIDQQGQQCYU=GBJFAOABCJFPDMGFHEKLDACA; JSESSIONID=26yu5m1b4upVuXoAoDmtMbWXQmetQpyzqjFANszo9vFubujT4qGX!-1149265879"
etc
I can't set the plugin at client to use automatic script just like IE browser uses. This option is not supported in JRE1.3.1. Looks to be supported in JRE1.4.1. My client doesn't want to set manual proxy ip and port in plugin as they don't want to reveal this info to everyone within the company for security reason.
Q.2. Why some classes like PanelBeanInfo.class, JAppletBeanInfo.class are downloaded
from my server while it doesn't exist at my webserver. Any thing stupid IE or plugin doing
at client. Any Idea?
Thanks in advance for any help.
RatanThanks to Mike and other friends who already replied on this topic.
Here is my research analysis:
Answer to Question 1:
~~~~~~~~~~~~~~~~~~~~~
The solution is to bundle all the images with JAR. Bundle with jar whichever needs it. However, it might require duplicacy.
Image img = null;
try
img = Toolkit.getDefaultToolkit().getImage(getClass().getResource(fileName));
catch (Exception e) { }
In this case make sure that you have image at the same location where you access it. For example if you have to access an image in package class com.awt.ui.MyClass then your image should also be at location ..\com\awt\ui
Note: It will require image duplicacy in your JAR but it solves the problem. It gives the advantage of fewer download from server.
Answer to Question 2:
~~~~~~~~~~~~~~~~~~~~~
IE treats applet as an active-X and try to look for these classes in your JAR. SUN has stopped its support in JDK1.3.1 and plus. What one can do is to create dummy classes with these names and bundle it with your JAR. You have to create these dummy classes if you enable Basic authentication on your web server then browser will try to look for these classes on the server and continue to prompt you for login and password. It might bother your customer un-necessarily to enter login and password too many times prompted by plug-in (plug in).
--Ratan -
How to run swing applets in a browser??
I understand it is a typical question and there lot of articles on it. I tried but am confused. I installed JRE1.3 which has java plug-in along with it which supports swing applets in a browser.Once i got that plug in i also downloaded html converter but am confused how should i run my swing applet.Can anyone please explain in simple steps as to how to achieve this objective..Thanks much in advance..an example would be of real big help
ThanksThe below links will help you.
http://java.sun.com/products/plugin//1.3/docs/index.docs.html
http://java.sun.com/products/plugin/1.3/plugin.faq.html -
Best IDE and how-to create HTML for a swing Applet
Can you help me out? I've been using, and teaching with the old Symantec VisualCafe product from long, long, ago. It still works fine & I can even use it to build JFC/Swing Applets etc. But a few things have occurred. For one, a way back, Symantec sold VisualCafe to WEBGAIN - who now has gone out of business and sold it to a company called TOGETHERSOFT - who doesn't support it any longer.
This isn't really a big deal to me, because I can still build and deploy applets that are pre-swing easily enough. (as can my students)
HOWEVER... I'd like to be running with the LATEST Java (I think it's 1.4.01) and I'd LIKE to use whatever is the best development environment I can use - especially one I can recommend to my students. Do you know what that should be?
What's more, I'd still like to take some JFC/Swing created applets (even if compiled with the older VisualCafe IDE) and generate the HTML to allow 1.4 enabled browsers to run them (this is the case for the schools versions of Explorer and Netscape). Now, the HTML I have INSTALLED for the students used the HTML converter - back in 1.2 to produce the HTML at the bottom of this. This code no longer works now with current browsers. Do you know HOW one makes a jfc/swing compiled applet run on the latest browsers?
Any help or direction you can give would be appreciated.
thanks,
Bobby Berns
[email protected]
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 756 HEIGHT = 396 codebase="http://java.sun.com/products/plugin/1.2/jinstall-12-win32.cab#Version=1,2,0,0">
<PARAM NAME = CODE VALUE = "lottery.class" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.2">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.2" java_CODE = "lottery.class" WIDTH = 756 HEIGHT = 396 pluginspage="http://java.sun.com/products/plugin/1.2/plugin-install.html"><NOEMBED></COMMENT>
</NOEMBED></EMBED>
</OBJECT>
<!--
<APPLET CODE = "lottery.class" WIDTH = 756 HEIGHT = 396 >
</APPLET>
-->
<!--"END_CONVERTED_APPLET"-->Bobby,
It's been a while since I've used the HTML Converter, but if I had to guess I'd say you need a newer version than what you have. Also, doesn't the converter allow you to choose which JDK you want to use (in which case you could select 1.4)? Again it's been a while so bear with me. Another option would be to put all the Swing classes into a .jar file (typically called swingall.jar) on your server and include that file as an attribute in your applet tag like this:
<APPLET CODE="yourApplet.class" ARCHIVE="swingall.jar">
This way you don't have to use the Java Plug-in, however the initial download time of the .jar file can be significant.
As for an IDE, I've always been happy using a text editor like UltraEdit. However, I've heard good things about Forte, and hey, it's free!
Regarding Christina's post, that solution will only work if the Applet does not use Swing components (and Bobby specifically said it does). By using the <OBJECT> and <EMBED> tags, rather than the <APPLET> tag, you force the browser to use the Java Plug-in (rather than the browser's default JVM).
Hope that helps,
- Sheepy -
How to load a java card applet into a java card
Dear All,
I am a novice to java card technology..
I have done some search on how to load a java card applet into a smart card but haven't found a satisfactory answer. I have read about installer.jar and scriptgen tool but I want to load the applet from a java program and not from command line. It would be of great help if somebody can help me out.
If somebody can share a sample program which load a javacard applet(.CAP file) into a smart card, I will be very thankful.
I am able to find some client applications which help us send APDU commands and recieve response APDU's to interact with an applet loaded on to the smart card but not application which actually load the applet.
I have heard of OCF and GP.. some say that OCF technology is outdated and no longer in use.. can somebosy throw some light on this too..
cheers,
ganeshhi siavash,
thanks for the quick response.. i checked out GPShell as suggested, it looked like a tool by which one can load an applet on to card and send some sample apdu commands... but I want to load the applet from the code.
My application should look something like this.. it will be a swing applicaton where I have a drop down with a list of readers, I select the one desired and then click on "LOAD" after inserting a blank java card, at this point my applet which is stored in my DB should get loaded on to the java card. The next step should be to personalize it where I enter the values for the static variables of my applet and click "PERSONALIZE", at this point all these values should be embedded into APDU commands and sent to the java card for processing.
For achieving this I am yet to find a comprehensive sample or documentation on the net.
Please help...
regards,
ganesh
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