Design issue using JFrame, JPanel, JLabel
I have been working on this problems for several months now and I and nearly finished.
I have a design question I hope others from this forum can provide some incite to the best approach.
The problem space is a 8 X 8 Chessboard. I have designed a board using JPanels and JLables sitting inside a JFrame. In each square on the chessboard is a JLabel with an image. The "board" sits in the DEFAULT LAYER of a JLayeredPane. As the user clicks a specific square, a queen is placed in the square (8-queens problem). The only thing I do is swap out the image. All this works well--thanks to several of you from this forum. :-)
When I add a new queen to the board, the application goes through the evaluation of attack positions. Next, the application should display the new chessboard with only the queens not threaten by other queens. I keep up with the chessboard using an boolean array internally. I build a second boolean array for the new or refreshed chessboard.
What I want to do is build a second chessboard and "swap" it out with the one in the default layered pane. Can someone be so kind and shine some light on this design issue for me?
Thank you for taking the time to read my post.
I don't understand this approach. Swing is by default 'double buffered' and will not flicker. You will get this be default since this is one of the things the Swing painting model gives over AWT.
You should look at just using JComponent and the paintComponent() method for drawing what you need.
What I've done in the past is have a simple XML JDoM model. Have components that render themselves based on this model.
Changing the model then I just issues a call to repaint() at the top level container.
You can also add and remove items from the parent container. Then issue validate() or repaint(). Can't remember now but I think validate() hits the layout manager logic and then repaints.
I'm pretty sure the Romain guy posted an example of how to easily draw a background chess board in a panel. ;-)
The tree concept might really prove useful for a 'gaming tree' approach at the AI also.
If you look at the Java3D API you will see they use a tree to represent what is rendered and the details about it. Really nice until you change something in the tree that cause the renderer to blow up. ;-)
I guess the moral is always make small simple changes and test.
Hope this is helpful.
Similar Messages
-
Design issue - Use (sub)sites or pages
My client has a complex organisation. A lot of departments.
The startpage of the site has to be a portal where a few people can upload documents. After checking thes documents (by 3 powerusers) the documents must be copied to the department sites. The best way to do that is using a workflow, I think. But if I create
subsites then the copy process will be difficult as a 2013 workflow cannot copy content over (sub)sites. A solution might be to use a page for each department but the autorisation and some other problems might pop up.
Any suggestions I did not think off?
Thanks, MikeHi Mike,
You can create a content type called departments and have your departments(HR, R&D etc..) as choice. Once you are done creating this content type, create a document library with that content type and once the document is approved you can either run a
workflow or have the approver fill up that department column to select the appropriate department that document belongs to. This can be done on the portal or the starterpage. And on the departments page or subsite you can use content query webpart to display
those documents accordingly.
Thanks,
norasampang -
UI design issue using Illustrator
Hi everyone,
I'm designing a UI for a 800x480 pixel screen.
Seems pretty simple right, but this is where it gets complicated...
The Active Area of the screen I'm designing for measures just 154.08mm x 85.92mm.
In Illustrator a 800x480 pixel artboard measures 282.22mm x 169.33mm.
So none of the elements that I've created are coming out to scale!!
Has anyone else run into this problem?
Almost forgot, to top it all off the device's screen pixels arent even square.
They measure 0.179 x 0.1926 giving me a pixel ratio of 0.929!!
I'm completely stumped!!Thanks for the reply Mylenium.
I understand that Illustrator is vector and therefore DPI is irrelevant but what do I do in my case?
Should I just rescale the UI elements to fit the screen size of 154.08mm x 85.92mm and cross my fingers? -
Hi Folks,
I've a security design issue using J2EE architecture framework in my
project..
Proj Requirement:
i) User Logs-into a health b2b/b2c portal website...
ii) Check the user exist in the database or LDAP directory service.
iii) If exist user then check the role Patient/Insurance Provider/Physician?
iv)If Patient then display his personal health record history.
else Insurance Provider then display about Insurance Policy information,
which he can update/create insurance for entered patient id. If patient has
granted access to Insurance Provider
and if Physician then display about hospital information like
waiting patients,sending appointments,etc..
The above security access control role & policy has to be implemented
very strong. so that other user cannot view/update someone health records..
Development tool:WebLogic Server/Oracle/LDAP.. on Linux
Security Problem:
i)What is the best security solution for the above requirement?
ii)How do I authenticate/validate user using J2EE security framework?
Can anyone explain in details or steps to implement?
Thanks,
-raj-I'm assuming that your using WLS 6, if so check out (I know we cover this in
the documentation but I'm guessing at the title) the "securing your site"
guide. Some of what you're planning the WLS server can protect through good
ACL usage. I'd recommend creating at least three groups (patient, provider,
physician), clearly the danger lies in having a user who is a member of more
than one group. I'd recommend implementing your own role checking at both
the servlet and EJB levels to fully enforce information access, using
servlet state and stateful session beans should help.
Alex
Raj <[email protected]> wrote in message
news:[email protected]..
Hi Folks,
I've a security design issue using J2EE architecture framework in my
project..
Proj Requirement:
i) User Logs-into a health b2b/b2c portal website...
ii) Check the user exist in the database or LDAP directory service.
iii) If exist user then check the role Patient/InsuranceProvider/Physician?
iv)If Patient then display his personal health record history.
else Insurance Provider then display about Insurance Policy information,
which he can update/create insurance for entered patient id. If patienthas
granted access to Insurance Provider
and if Physician then display about hospital information like
waiting patients,sending appointments,etc..
The above security access control role & policy has to be implemented
very strong. so that other user cannot view/update someone healthrecords..
>
Development tool:WebLogic Server/Oracle/LDAP.. on Linux
Security Problem:
i)What is the best security solution for the above requirement?
ii)How do I authenticate/validate user using J2EE security framework?
Can anyone explain in details or steps to implement?
Thanks,
-raj- -
HELP Create Extenstion using JFrame instead of JPanel (10.1.3 Release 3)
Hi,
I manage to create a custom GUI editor in JDev but if i switch it to JFrame, JDev GUI Designer display nothing but an invinsible frame.
I'm using sample from customeditor in extension sdk
Any ideas ?
ThanksIt seems that you are trying to use a JFrame as the GUI of your custom editor. The JFrame is a heavy weight component (has a real window behind it). In JDeveloper custom editors must not use JFrames or AWT Frames as their root GUIs. The windows of these frames will paint on top of other editors even if they are behind in the component stacking order.
-
Design Issue: Localization using Lookup OR Dependency Injection
Hello Forums!
I'm having a design issue regarding localization in my application. I'm using Spring Framework (www.springframework.org) as an
application container, which provides DI (dependency injection) - but the issue is not Spring- but rather design related. All localization
logic is encapsulated in a separate class ("I18nManager"), which basically is just a wrapper around multiple Java ResourceBundles.
Right now localization is performed in the "traditional" look-up style, e.g.
ApplicationContext.getMessage("some.message.key");
where ApplicationContext is a wrapper around the Spring application context and getMessage(...) is a static method on that
context. The advantage of that solution is a clean & simple interface design, localization merely becomes a feature of classes, but
is not part of their public API. The only problem with that approach is the very tight coupling of Classes to the ApplicationContext, which
really is a problem when you want to use code outside of an application context. The importance of this problem increases if one considers
that I18N is a concern that can be found in every application layer, from GUI to business to data tier, all those components suddenly depdend
on an application context being present.
My proposed solution to this problem is a "Localizable" interface, which may provide mutators for an "I18NManager" instance that can be
passed in. But is this really a well-designed solution, as almost any object in an application may be required to implement this interface?
I'm too concerned about performance: the look-up solution does not need to pass references to localizable objects, whereas my proposed solution
will require 1 I18NManager reference per localizable object, which might cause troubles if you let's say load 10.000 POJOs from some database that
are all localizable.
So (finally) my question: how do you handle such design issues? Are there any other solutions out there that I'm not aware of yet? Comments/Help welcome!michael_schmid wrote:
Hello Forums!
I'm having a design issue regarding localization in my application. I'm using Spring Framework (www.springframework.org) as an
application container, which provides DI (dependency injection) - but the issue is not Spring- but rather design related. All localization
logic is encapsulated in a separate class ("I18nManager"), which basically is just a wrapper around multiple Java ResourceBundles.Why do you think you need a wrapper around resource bundles? Spring does very well with I18N, as well as Java does. What improvement do you think you bring?
Right now localization is performed in the "traditional" look-up style, e.g.
ApplicationContext.getMessage("some.message.key");
where ApplicationContext is a wrapper around the Spring application context and getMessage(...) is a static method on that
context. Now you're wrapping the Spring app context? Oh, brother. Sounds mad to me.
The advantage of that solution is a clean & simple interface design, localization merely becomes a feature of classes, but
is not part of their public API. The only problem with that approach is the very tight coupling of Classes to the ApplicationContext, which
really is a problem when you want to use code outside of an application context. The importance of this problem increases if one considers
that I18N is a concern that can be found in every application layer, from GUI to business to data tier, all those components suddenly depdend
on an application context being present.One man's "tight coupling" is another person's dependency.
I agree that overly tight coupling can be a problem, but sometimes a dependency just can't be helped. They aren't all bad. The only class with no dependencies calls no one and is called by no one. We'd call that a big, fat main class. What good is that?
Personally, I would discourage you from wrapping Spring too much. I doubt that you're improving your life. Better to use Spring straight, the way it was intended. I find that they're much better designers than I am.
My proposed solution to this problem is a "Localizable" interface, which may provide mutators for an "I18NManager" instance that can be
passed in. But is this really a well-designed solution, as almost any object in an application may be required to implement this interface?I would say no.
I'm too concerned about performance: the look-up solution does not need to pass references to localizable objects, whereas my proposed solution
will require 1 I18NManager reference per localizable object, which might cause troubles if you let's say load 10.000 POJOs from some database that
are all localizable.
So (finally) my question: how do you handle such design issues? Are there any other solutions out there that I'm not aware of yet? Comments/Help welcome!I would use the features that are built into Spring and Java until I ran into a problem. It seems to me that you're wrapping your way into a problem and making things more complex than they need to be.
% -
Inserting a Gui program using JFrames and JPanel
I'm trying to insert a chat program into a game that I've created! The chat program is using JFrames and JPanels. I want to insert this into a GridLayout and Panel. How can I go about doing this?
whatever is in the frame's contentPane now, you add to a separate JPanel.
you also add your chat stuff to the separate panel
the separate panel is added to the frame as the content pane -
How to force to wait and get input from a jframe-jpanel?
I would like to use a jframe-jpanel to get user input instead of using JOptionPane.showInputDialog since there will be more than 1 input.
But I could not do it. The code reads the panel lines and passes to other lines below without waiting for the okay button to be pressed.
This is the part of code of my main frame;
jLabel10.setText(dene.toString());
if (dene == 0) {
// todo add button input panel
//String todo_write = JOptionPane.showInputDialog("Please enter a todo item");
JFrame frameTodoAddInput = new JFrame( "Please input..." );
TodoAddAsk1JPanel todoaddpanel = new TodoAddAsk1JPanel();
frameTodoAddInput.add(todoaddpanel);
frameTodoAddInput.setSize( 600, 200 ); // set frame size
frameTodoAddInput.setLocation(300, 300);
//String todo_write = todoaddpanel.getNewTodoItem();
String todo_write = todoaddpanel.getNewTodoItem();
jLabel10.setText("Satir 1822 de".concat(todo_write));
// end of todo add button input panel
todoTextPane1.setText(todo_write);
This is the code of input panel;
* TodoAddAsk1JPanel.java
* Created on May 6, 2007, 12:03 AM
package javaa;
public class TodoAddAsk1JPanel extends javax.swing.JPanel {
/** Creates new form TodoAddAsk1JPanel */
public TodoAddAsk1JPanel() {
initComponents();
private String NewTodoItem = "";
public String getNewTodoItem() {
NewTodoItem = ANewTodoItemTextField.getText();
return this.NewTodoItem;
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
ANewTodoItemTextField = new javax.swing.JTextField();
jLabel2 = new javax.swing.JLabel();
PriorityComboBox = new javax.swing.JComboBox();
jLabel3 = new javax.swing.JLabel();
DayValueComboBox = new javax.swing.JComboBox();
MonthValueComboBox = new javax.swing.JComboBox();
YearValueComboBox = new javax.swing.JComboBox();
OkayButton = new javax.swing.JButton();
CancelButton = new javax.swing.JButton();
TimeValueComboBox = new javax.swing.JComboBox();
jLabel1.setText("Please enter a todo item:");
jLabel2.setText("Please select its priority level:");
PriorityComboBox.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "A", "B", "C" }));
jLabel3.setText("Please select its due date:");
DayValueComboBox.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31" }));
MonthValueComboBox.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }));
YearValueComboBox.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "2007", "2008", "2009", "2010", "2011", "2012", "2013", "2014", "2015", "2016", "2017", "2018", "2019", "2020", "2021", "2022", "2023", "2024", "2025", "2026", "2027", "2028", "2029", "2030", "2031", "2032", "2033", "2034", "2035", "2036", "2037", "2038", "2039", "2040", "2041", "2042", "2043", "2044", "2045", "2046", "2047", "2048", "2049", "2050", "2051", "2052", "2053", "2054", "2055", "2056", "2057", "2058", "2059", "2060", "2061", "2062", "2063", "2064", "2065", "2066", "2067", "2068", "2069", "2070" }));
OkayButton.setText("OK");
OkayButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
OkayButtonActionPerformed(evt);
CancelButton.setText("Cancel");
TimeValueComboBox.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "08:30", "09:00", "09:30", "10:00", "10:30", "11:00", "11:30", "12:00", "12:30", "13:00", "13:30", "14:00", "14:30", "15:00", "15:30", "16:00", "16:30", "17:00", "17:30", "18:00", "18:30", "19:00", "19:30", "20:00", "20:30", "21:00", "21:30", "22:00", "22:30", "23:00", "23:30", "00:00", "00:30", "01:00", "01:30", "02:00", "02:30", "03:00", "03:30", "04:00", "04:30", "05:00", "05:30", "06:00", "06:30", "07:00", "07:30", "08:00" }));
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 142, Short.MAX_VALUE)
.addComponent(jLabel2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, 142, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(PriorityComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(ANewTodoItemTextField, javax.swing.GroupLayout.PREFERRED_SIZE, 279, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(OkayButton, javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 133, Short.MAX_VALUE)
.addComponent(CancelButton))
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addComponent(DayValueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(MonthValueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(YearValueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(13, 13, 13)
.addComponent(TimeValueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(42, 42, 42)))
.addContainerGap())
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(ANewTodoItemTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(PriorityComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(DayValueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(MonthValueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(YearValueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(TimeValueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(OkayButton)
.addComponent(CancelButton))
.addContainerGap())
}// </editor-fold>
private void OkayButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
NewTodoItem = ANewTodoItemTextField.getText();
// Variables declaration - do not modify
private javax.swing.JTextField ANewTodoItemTextField;
private javax.swing.JButton CancelButton;
private javax.swing.JComboBox DayValueComboBox;
private javax.swing.JComboBox MonthValueComboBox;
private javax.swing.JButton OkayButton;
private javax.swing.JComboBox PriorityComboBox;
private javax.swing.JComboBox TimeValueComboBox;
private javax.swing.JComboBox YearValueComboBox;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
// End of variables declaration
I want to get the resulted input of "NewTodoItem"
Thanks in advance for your kind help.
GuvenThank you very much for your help. But I would like
to get 3 inputs from 1 window at the same time and I
could not find any example code for JDialog for more
than 1 input. If any body can show how to write this
code, it would be appreciated.
ThanksYou can write your own. A JDialog is a container just look a JFrame is. -
I need to use a JPanel as a JButton
We have a requirement here to display a panel full of various text fields and colors, but have it act like a Button. Focus handling, click handling, etc...
Anyone know of a JButton class that lets you use a JPanel as it's content instead of just a text string or icon?package testthing;
import javax.swing.JFrame;
public class Main {
* @param args the command line arguments
public static void main(String[] args) {
JFrame frame = new NewJFrame();
frame.setVisible(true);
* NewJFrame.java
* Created on Aug 27, 2010, 12:14:32 PM
package testthing;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.WindowConstants;
public class NewJFrame extends javax.swing.JFrame {
/** Creates new form NewJFrame */
public NewJFrame() {
initComponents();
jButton1.setLayout( new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.BOTH;
gbc.weightx = 1.0;
gbc.weighty = 1.0;
jButton1.add(jPanel1, gbc);
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
GridBagConstraints gridBagConstraints;
jButton1 = new JButton();
jPanel1 = new JPanel();
jLabel1 = new JLabel();
jLabel2 = new JLabel();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new GridBagLayout());
jButton1.setContentAreaFilled(false);
gridBagConstraints = new GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
gridBagConstraints.anchor = GridBagConstraints.NORTHWEST;
gridBagConstraints.insets = new Insets(2, 2, 2, 2);
getContentPane().add(jButton1, gridBagConstraints);
jPanel1.setBackground(new Color(255, 204, 204));
jPanel1.setLayout(new GridBagLayout());
jLabel1.setText("jLabel1");
gridBagConstraints = new GridBagConstraints();
gridBagConstraints.insets = new Insets(4, 4, 4, 4);
jPanel1.add(jLabel1, gridBagConstraints);
jLabel2.setText("jLabel2");
gridBagConstraints = new GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 1;
gridBagConstraints.anchor = GridBagConstraints.NORTHWEST;
gridBagConstraints.insets = new Insets(4, 4, 4, 4);
jPanel1.add(jLabel2, gridBagConstraints);
gridBagConstraints = new GridBagConstraints();
gridBagConstraints.gridx = 1;
gridBagConstraints.gridy = 1;
gridBagConstraints.anchor = GridBagConstraints.NORTHWEST;
gridBagConstraints.insets = new Insets(2, 2, 2, 2);
getContentPane().add(jPanel1, gridBagConstraints);
pack();
}// </editor-fold>
* @param args the command line arguments
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
// Variables declaration - do not modify
private JButton jButton1;
private JLabel jLabel1;
private JLabel jLabel2;
private JPanel jPanel1;
// End of variables declaration
} -
JButton not visible after use of Jpanel removeAll ..
Hi!
I'm having a calculator class that inherits JFrame. I need to add more buttons after setting an option from the (view) menu bar .. (from normal to scientific calculator). I needed to use the JPanel removeAll method and then add the normal buttons plus extra buttons. But the problem is, that the Buttons are only visible when I touch them with the mouse.
Does anybody know why? Thanks for your help!
See code below (still in construction phase):
Name: Hemanth. B
Original code from Website: java-swing-tutorial.html
Topic : A basic Java Swing Calculator
Conventions Used in Source code
1. All JLabel components start with jlb*
2. All JPanel components start with jpl*
3. All JMenu components start with jmenu*
4. All JMenuItem components start with jmenuItem*
5. All JDialog components start with jdlg*
6. All JButton components start with jbn*
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator extends JFrame
implements ActionListener {
// Constants
final int NORMAL = 0;
final int SCIENTIFIC = 8;
final int MAX_INPUT_LENGTH = 20;
final int INPUT_MODE = 0;
final int RESULT_MODE = 1;
final int ERROR_MODE = 2;
// Variables
int displayMode;
int calcType = SCIENTIFIC;
boolean clearOnNextDigit, percent;
double lastNumber;
String lastOperator, title;
private JMenu jmenuFile, jmenuView, jmenuHelp;
private JMenuItem jmenuitemExit, jmenuitemAbout;
private JRadioButtonMenuItem jmenuItemNormal = new JRadioButtonMenuItem("Normal");
private JRadioButtonMenuItem jmenuItemScientific = new JRadioButtonMenuItem("Scientific");
private ButtonGroup viewMenuButtonGroup = new ButtonGroup();
private JLabel jlbOutput;
private JButton jbnButtons[];
private JPanel jplButtons, jplMaster, jplBackSpace, jplControl;
* Font(String name, int style, int size)
Creates a new Font from the specified name, style and point size.
Font f12 = new Font("Verdana", 0, 12);
Font f121 = new Font("Verdana", 1, 12);
// Constructor
public Calculator(String title) {
/* Set Up the JMenuBar.
* Have Provided All JMenu's with Mnemonics
* Have Provided some JMenuItem components with Keyboard Accelerators
//super(title);
this.title = title;
//displayCalculator(title);
} //End of Contructor Calculator
private void displayCalculator (String title) {
//add WindowListener for closing frame and ending program
addWindowListener (
new WindowAdapter() {
public void windowClosed(WindowEvent e) {
System.exit(0);
//setResizable(false);
//Set frame layout manager
setBackground(Color.gray);
validate();
createMenuBar();
createMasterPanel();
createDisplayPanel();
clearAll();
this.getContentPane().validate();
requestFocus();
pack();
//getContentPane().
setVisible(true);
private void createMenuBar() {
jmenuFile = new JMenu("File");
jmenuFile.setFont(f121);
jmenuFile.setMnemonic(KeyEvent.VK_F);
jmenuitemExit = new JMenuItem("Exit");
jmenuitemExit.setFont(f12);
jmenuitemExit.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_X,
ActionEvent.CTRL_MASK));
jmenuFile.add(jmenuitemExit);
jmenuView = new JMenu("View");
jmenuFile.setFont(f121);
jmenuFile.setMnemonic(KeyEvent.VK_W);
jmenuItemNormal.setMnemonic(KeyEvent.VK_N);
viewMenuButtonGroup.add(jmenuItemNormal);
jmenuView.add(jmenuItemNormal);
jmenuItemScientific.setMnemonic(KeyEvent.VK_S);
viewMenuButtonGroup.add(jmenuItemScientific);
jmenuView.add(jmenuItemScientific);
if (jmenuItemNormal.isSelected() == false &&
jmenuItemScientific.isSelected() == false)
jmenuItemScientific.setSelected(true);
jmenuHelp = new JMenu("Help");
jmenuHelp.setFont(f121);
jmenuHelp.setMnemonic(KeyEvent.VK_H);
jmenuitemAbout = new JMenuItem("About Calculator");
jmenuitemAbout.setFont(f12);
jmenuHelp.add(jmenuitemAbout);
JMenuBar menubar = new JMenuBar();
menubar.add(jmenuFile);
menubar.add(jmenuView);
menubar.add(jmenuHelp);
setJMenuBar(menubar);
jmenuItemNormal.addActionListener(this);
jmenuItemScientific.addActionListener(this);
jmenuitemAbout.addActionListener(this);
jmenuitemExit.addActionListener(this);
private void createDisplayPanel() {
if (jlbOutput != null) {
jlbOutput.removeAll();
jlbOutput = new JLabel("0",JLabel.RIGHT);
jlbOutput.setBackground(Color.WHITE);
jlbOutput.setOpaque(true);
// Add components to frame
getContentPane().add(jlbOutput, BorderLayout.NORTH);
jlbOutput.setVisible(true);
private void createMasterPanel() {
if (jplMaster != null) {
jplMaster.removeAll();
jplMaster = new JPanel(new BorderLayout());
createCalcButtons();
jplMaster.add(jplBackSpace, BorderLayout.WEST);
jplMaster.add(jplControl, BorderLayout.EAST);
jplMaster.add(jplButtons, BorderLayout.SOUTH);
((JPanel)getContentPane()).revalidate();
// Add components to frame
getContentPane().add(jplMaster, BorderLayout.SOUTH);
jplMaster.setVisible(true);
private void createCalcButtons() {
int rows = 4;
int cols = 5 + calcType/rows;
jbnButtons = new JButton[31];
// Create numeric Jbuttons
for (int i=0; i<=9; i++) {
// set each Jbutton label to the value of index
jbnButtons[i] = new JButton(String.valueOf(i));
// Create operator Jbuttons
jbnButtons[10] = new JButton("+/-");
jbnButtons[11] = new JButton(".");
jbnButtons[12] = new JButton("=");
jbnButtons[13] = new JButton("/");
jbnButtons[14] = new JButton("*");
jbnButtons[15] = new JButton("-");
jbnButtons[16] = new JButton("+");
jbnButtons[17] = new JButton("sqrt");
jbnButtons[18] = new JButton("1/x");
jbnButtons[19] = new JButton("%");
jplBackSpace = new JPanel();
jplBackSpace.setLayout(new GridLayout(1, 1, 2, 2));
jbnButtons[20] = new JButton("Backspace");
jplBackSpace.add(jbnButtons[20]);
jplControl = new JPanel();
jplControl.setLayout(new GridLayout(1, 2, 2 ,2));
jbnButtons[21] = new JButton(" CE ");
jbnButtons[22] = new JButton("C");
jplControl.add(jbnButtons[21]);
jplControl.add(jbnButtons[22]);
//if (calcType == SCIENTIFIC) {
jbnButtons[23] = new JButton("s");
jbnButtons[24] = new JButton("t");
jbnButtons[25] = new JButton("u");
jbnButtons[26] = new JButton("v");
jbnButtons[27] = new JButton("w");
jbnButtons[28] = new JButton("x");
jbnButtons[29] = new JButton("y");
jbnButtons[30] = new JButton("z");
// Setting all Numbered JButton's to Blue. The rest to Red
for (int i=0; i<jbnButtons.length; i++) {
//activate ActionListener
System.out.println("add action listener: " + i);
jbnButtons.addActionListener(this);
//set button text font/colour
jbnButtons[i].setFont(f12);
jbnButtons[i].invalidate();
if (i<10)
jbnButtons[i].setForeground(Color.blue);
else
jbnButtons[i].setForeground(Color.red);
// container for Jbuttons
jplButtons = new JPanel(new GridLayout(rows, cols, 2, 2));
System.out.println("Cols: " + cols);
//Add buttons to keypad panel starting at top left
// First row
// extra left buttons for scientific
if (calcType == SCIENTIFIC) {
System.out.println("Adding Scientific buttons");
setSize(400, 217);
setLocation(200, 250);
jplButtons.add(jbnButtons[23]);
jplButtons.add(jbnButtons[27]);
} else {
setSize(241, 217);
setLocation(200, 250);
for(int i=7; i<=9; i++) {
jplButtons.add(jbnButtons[i]);
// add button / and sqrt
jplButtons.add(jbnButtons[13]);
jplButtons.add(jbnButtons[17]);
// Second row
// extra left buttons for scientific
if (calcType == SCIENTIFIC) {
System.out.println("Adding Scientific buttons");
jplButtons.add(jbnButtons[24]);
jplButtons.add(jbnButtons[28]);
for(int i=4; i<=6; i++) {
jplButtons.add(jbnButtons[i]);
// add button * and x^2
jplButtons.add(jbnButtons[14]);
jplButtons.add(jbnButtons[18]);
// Third row
// extra left buttons for scientific
if (calcType == SCIENTIFIC) {
System.out.println("Adding Scientific buttons");
jplButtons.add(jbnButtons[25]);
jplButtons.add(jbnButtons[29]);
for( int i=1; i<=3; i++) {
jplButtons.add(jbnButtons[i]);
//adds button - and %
jplButtons.add(jbnButtons[15]);
jplButtons.add(jbnButtons[19]);
//Fourth Row
// extra left buttons for scientific
if (calcType == SCIENTIFIC) {
System.out.println("Adding Scientific buttons");
jplButtons.add(jbnButtons[26]);
jplButtons.add(jbnButtons[30]);
// add 0, +/-, ., +, and =
jplButtons.add(jbnButtons[0]);
jplButtons.add(jbnButtons[10]);
jplButtons.add(jbnButtons[11]);
jplButtons.add(jbnButtons[16]);
jplButtons.add(jbnButtons[12]);
jplButtons.revalidate();
// Perform action
public void actionPerformed(ActionEvent e){
double result = 0;
if(e.getSource() == jmenuitemAbout) {
//JDialog dlgAbout = new CustomABOUTDialog(this,
// "About Java Swing Calculator", true);
//dlgAbout.setVisible(true);
} else if(e.getSource() == jmenuitemExit) {
System.exit(0);
if (e.getSource() == jmenuItemNormal) {
calcType = NORMAL;
displayCalculator(title);
if (e.getSource() == jmenuItemScientific) {
calcType = SCIENTIFIC;
displayCalculator(title);
System.out.println("Calculator is set to "
+ (calcType == NORMAL?"Normal":"Scientific") + " :" + jbnButtons.length);
// Search for the button pressed until end of array or key found
for (int i=0; i<jbnButtons.length; i++) {
if(e.getSource() == jbnButtons[i]) {
System.out.println(i);
switch(i) {
case 0:
addDigitToDisplay(i);
break;
case 1:
System.out.println("1");
addDigitToDisplay(i);
break;
case 2:
addDigitToDisplay(i);
break;
case 3:
addDigitToDisplay(i);
break;
case 4:
addDigitToDisplay(i);
break;
case 5:
addDigitToDisplay(i);
break;
case 6:
addDigitToDisplay(i);
break;
case 7:
addDigitToDisplay(i);
break;
case 8:
addDigitToDisplay(i);
break;
case 9:
addDigitToDisplay(i);
break;
case 10: // +/-
processSignChange();
break;
case 11: // decimal point
addDecimalPoint();
break;
case 12: // =
processEquals();
break;
case 13: // divide
processOperator("/");
break;
case 14: // *
processOperator("*");
break;
case 15: // -
processOperator("-");
break;
case 16: // +
processOperator("+");
break;
case 17: // sqrt
if (displayMode != ERROR_MODE) {
try {
if (getDisplayString().indexOf("-") == 0)
displayError("Invalid input for function!");
result = Math.sqrt(getNumberInDisplay());
displayResult(result);
catch(Exception ex) {
displayError("Invalid input for function!");
displayMode = ERROR_MODE;
break;
case 18: // 1/x
if (displayMode != ERROR_MODE){
try {
if (getNumberInDisplay() == 0)
displayError("Cannot divide by zero!");
result = 1 / getNumberInDisplay();
displayResult(result);
catch(Exception ex) {
displayError("Cannot divide by zero!");
displayMode = ERROR_MODE;
break;
case 19: // %
if (displayMode != ERROR_MODE){
try {
result = getNumberInDisplay() / 100;
displayResult(result);
catch(Exception ex) {
displayError("Invalid input for function!");
displayMode = ERROR_MODE;
break;
case 20: // backspace
if (displayMode != ERROR_MODE) {
setDisplayString(getDisplayString().substring(0,
getDisplayString().length() - 1));
if (getDisplayString().length() < 1)
setDisplayString("0");
break;
case 21: // CE
clearExisting();
break;
case 22: // C
clearAll();
break;
void setDisplayString(String s) {
jlbOutput.setText(s);
String getDisplayString () {
return jlbOutput.getText();
void addDigitToDisplay(int digit) {
if (clearOnNextDigit)
setDisplayString("");
String inputString = getDisplayString();
if (inputString.indexOf("0") == 0) {
inputString = inputString.substring(1);
if ((!inputString.equals("0") || digit > 0)
&& inputString.length() < MAX_INPUT_LENGTH) {
setDisplayString(inputString + digit);
displayMode = INPUT_MODE;
clearOnNextDigit = false;
void addDecimalPoint() {
displayMode = INPUT_MODE;
if (clearOnNextDigit)
setDisplayString("");
String inputString = getDisplayString();
// If the input string already contains a decimal point, don't
// do anything to it.
if (inputString.indexOf(".") < 0)
setDisplayString(new String(inputString + "."));
void processSignChange() {
if (displayMode == INPUT_MODE) {
String input = getDisplayString();
if (input.length() > 0 && !input.equals("0")) {
if (input.indexOf("-") == 0)
setDisplayString(input.substring(1));
else
setDisplayString("-" + input);
} else if (displayMode == RESULT_MODE) {
double numberInDisplay = getNumberInDisplay();
if (numberInDisplay != 0)
displayResult(-numberInDisplay);
void clearAll() {
setDisplayString("0");
lastOperator = "0";
lastNumber = 0;
displayMode = INPUT_MODE;
clearOnNextDigit = true;
void clearExisting() {
setDisplayString("0");
clearOnNextDigit = true;
displayMode = INPUT_MODE;
double getNumberInDisplay() {
String input = jlbOutput.getText();
return Double.parseDouble(input);
void processOperator(String op) {
if (displayMode != ERROR_MODE) {
double numberInDisplay = getNumberInDisplay();
if (!lastOperator.equals("0")) {
try {
double result = processLastOperator();
displayResult(result);
lastNumber = result;
catch (DivideByZeroException e) {
displayError("Cannot divide by zero!");
} else {
lastNumber = numberInDisplay;
clearOnNextDigit = true;
lastOperator = op;
void processEquals() {
double result = 0;
if (displayMode != ERROR_MODE){
try {
result = processLastOperator();
displayResult(result);
catch (DivideByZeroException e) {
displayError("Cannot divide by zero!");
lastOperator = "0";
double processLastOperator() throws DivideByZeroException {
double result = 0;
double numberInDisplay = getNumberInDisplay();
if (lastOperator.equals("/")) {
if (numberInDisplay == 0)
throw (new DivideByZeroException());
result = lastNumber / numberInDisplay;
if (lastOperator.equals("*"))
result = lastNumber * numberInDisplay;
if (lastOperator.equals("-"))
result = lastNumber - numberInDisplay;
if (lastOperator.equals("+"))
result = lastNumber + numberInDisplay;
return result;
void displayResult(double result){
setDisplayString(Double.toString(result));
lastNumber = result;
displayMode = RESULT_MODE;
clearOnNextDigit = true;
void displayError(String errorMessage){
setDisplayString(errorMessage);
lastNumber = 0;
displayMode = ERROR_MODE;
clearOnNextDigit = true;
public static void main(String args[]) {
Calculator calci = new Calculator("My Calculator");
calci.displayCalculator("My Calculator");
System.out.println("Exitting...");
} //End of Swing Calculator Class.
class DivideByZeroException extends Exception{
public DivideByZeroException() {
super();
public DivideByZeroException(String s) {
super(s);
class CustomABOUTDialog extends JDialog implements ActionListener {
JButton jbnOk;
CustomABOUTDialog(JFrame parent, String title, boolean modal){
super(parent, title, modal);
setBackground(Color.black);
JPanel p1 = new JPanel(new FlowLayout(FlowLayout.CENTER));
StringBuffer text = new StringBuffer();
text.append("Calculator Information\n\n");
text.append("Developer: Hemanth\n");
text.append("Version: 1.0");
JTextArea jtAreaAbout = new JTextArea(5, 21);
jtAreaAbout.setText(text.toString());
jtAreaAbout.setFont(new Font("Times New Roman", 1, 13));
jtAreaAbout.setEditable(false);
p1.add(jtAreaAbout);
p1.setBackground(Color.red);
getContentPane().add(p1, BorderLayout.CENTER);
JPanel p2 = new JPanel(new FlowLayout(FlowLayout.CENTER));
jbnOk = new JButton(" OK ");
jbnOk.addActionListener(this);
p2.add(jbnOk);
getContentPane().add(p2, BorderLayout.SOUTH);
setLocation(408, 270);
setResizable(false);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
Window aboutDialog = e.getWindow();
aboutDialog.dispose();
pack();
public void actionPerformed(ActionEvent e) {
if(e.getSource() == jbnOk) {
this.dispose();
Message was edited by:
dungorgSwing related questions should be posted in the Swing forum.
After adding or removing components from a visible panel you need to use panel.revalidate() and sometimes panel.repaint();
If you need further help then you need to create a [url http://homepage1.nifty.com/algafield/sscce.html]Short, Self Contained, Compilable and Executable, Example Program (SSCCE) that demonstrates the incorrect behaviour, because I can't guess exactly what you are doing based on the information provided.
Don't forget to use the [url http://forum.java.sun.com/help.jspa?sec=formatting]Code Formatting Tags so the posted code retains its original formatting. -
Design issue with the multiprovider
Design issue with the multiprovider :
I have the following problem when using my multiprovider.
The data flow is like this. I have the info-objects IobjectA, IobjectB, IobjectCin my Cube.(Source for this data is s-systemA)
And from another s-system I am also loading the masterdata for IobjectA
Now I have created the multiprovider based on the cube and IobjectA.
However, surprisingly join in not workign in multiprovider correctly.
Scenario :
Record from the Cube.
IObjectA= 1AAA
IObjectB = 2BBB
IObjectC = 3CCC
Records from IobjectA =1AAA.
I expect the record should be like this :
IObjectA : IObjectB: IObjectC
1AAA :2BBB :3CCC
However, I am getting the record like this:
IObjectA : IObjectB: IObjectC
1AAA :2BBB :3CCC
1AAA : # :#
In the Identification section I have selected both the entries for IobjectA still I am getting this error.
My BW Version is 3.0B and the SP is 31.
Thanks in advance for your suggestion.May be I was not clear enough in my first explanation, Let me try again to explain my scenario:
My Expectation from Multi Provider is :
IObjectA
1AAA
(From InfoObject)
Union
IObjectA IObjectB IObjectC
1AAA 2BBB 3CCC
(From Cube)
The record in the multiprovider should be :
IObjectA IObjectB IObjectC
1AAA 2BBB 3CCC
Because, this is what the Union says .. and the Definition of the multiprovider also says the same thing :
http://help.sap.com/saphelp_bw30b/helpdata/EN/ad/6b023b6069d22ee10000000a11402f/frameset.htm
Do you still think this is how the behaviour of the multiprovider.. if that is the case what would be the purpose of having an infoobject in the multiprovider.
Thank you very much in advance for your responses.
Best Regards.,
Praveen. -
Design issue with sharing LV2 style global between run-time executables
Hi,
Just when I though that I had everything figured out, I ran into this design issue.
The application that I wrote is pretty much a client-server application where the server publishes data and the client subscribes data using data sockets. Once the client gets all the data in the mainClient.vi program, I use LV2 style (using shift registers) to make the data global to all the other sub-vi’s. So the LV2 is in initialize mode in the mainClient.vi program and then in the sub-vi’s the LV2 is in read mode. Also, I had built the run time menu for each sub-vi that when an item is selected from the menu, I would use the get menu selection to get the item tag which will be the file nam
e of the sub-vi and open the selected sub-vi using vi server. This all worked great on my workstation where I have labVIEW 7.0 Express installed. But the final goal is to make exe’s for each of these sub-vi’s and install runtime on the PC’s that do not have labVIEW installed. Of course when I did that only the mainClient.exe program was getting the updated data from the server but the sub-vi’s were not getting the data from the mainClient.exe. I did realize that the reason for this is due to the fact that I had compiled all the sub-vi’s separately and so the LV2 vi is now local to each executable (i.e. all executables have their own memory location). Also, the run-time menu did not work because now I am trying to open an executable using vi server properties.
To summarize, is there a way to share LV2 style global's between executables without compiling all of the sub-vi’s at one time? I tried using data-sockets (local-host) instead of LV2 st
yle gloabls to communicate between the sub-vi’s but I ran into performance issues due to the large volume of data.
I would really appreciate it if anyone can suggest a solution/alternative to this problem.
Thanks
Nish> 1) How would I create a wrap-around for the LV2.vi which is
> initialized in my mainClient.vi and then how would I use vi server in
> my sub-vi to refer to that LV2.vi?
> You mentioned that each sub-vi when opened will first connect to the
> LV2.vi via via-server and will keep the connection in the shift
> register of that sub-vi. Does this mean that the sub-vi is accessing
> (pass-by-reference) the shared memory of the mainClient.vi? If this
> is what you meant I think that this might work for my application.
>
If the LV2 global is loaded statically into your mainClient.vi, then any
other application can connect to the exe and get a reference to the VI
using the VI name. This gives you a VI reference you can use to call
the VI. Ye
s, the values will be copied between applications. That is
why you need to add access operations to the global that returns just
the info needed. If you need the average, do that in the global. If
you need the array size, do that in the global. Returning the entire
array shouldn't be a common operation on the LV2 style global anyway.
> 2) Just to elaborate on my application, the data is
> transferred via DataSockets from the mainServer.vi on another PC to
> the client’s PC where the mainClient.vi program subscribes the
> data (i.e. 5 arrays of double type and each arrays has about 50,000
> elements). The sub-vi’s will have to access these arrays
> located on the mainClient.vi every scan. Is there any limitation on
> referencing the mainClient.vi data via vi-server from each sub-vi?
Your app does need to watch both the amount of data being passed across
the network, and the amount being shared between the apps. You might
want to consider puttin
g the VIs back into the main app. What is the
reason you are breaking them apart for?
Greg McKaskle -
A web service design issue with patterns
Hello,
I�d like to ask for your help in the following design issue:
I need to create an email sending web service (with Axis). Only just one method which returns with an integer return code. This handles the following:
- based on the given parameters gets the email addresses from an
LDAP server (with netscape ldap for java)
- makes a cache from them (only after a timeout period will be the cache
refreshed) (don�t know what tool to use for this)
- selects html templates which to be sent based on the given parameters
- sends emails with the appropriate templates (with Velocity)
- the whole process is logged (with log4j)
I have to write the code as generic as possible. I know that some design pattern should be used for this. (some from GoF , and I know there exists design patterns specially created for web services as well).
Could you enumerate me which patterns (and for what part of the program) would be the best choice to solve this problem? I have read through some books about patterns, but don�t have the knowledge to pick up the right one for a concrete problem like this..
Thank you in advance,
nagybalyHello,
I�d like to ask for your help in the following design
issue:
I need to create an email sending web service (with
Axis). Only just one method which returns with an
integer return code. This handles the following:Lots of responsibilities here. You would do well to break this up into several classes that you can test separately.
I would also advise that you not embed all this in a servlet. Make a service that collaborates with several objects to accomplish the task and let the serlvet just call it.
.> - based on the given parameters gets the email
addresses from an
LDAP server (with netscape ldap for java)I'd recommend Spring's LDAP module. Pretty terrific stuff.
cache from them (only after a timeout period will be
the cache
refreshed) (don�t know what tool to use for
this)Maybe EhCache or OsCache or something like that.
- selects html templates which to be sent based on
the given parametersWhere does this come from? Certainly not the LDAP. A relational database? Write a DAO for the document template.
- sends emails with the appropriate templates (with
Velocity)Have an e-mail sender service using Java Mail.
- the whole process is logged (with log4j)Easily done.
I have to write the code as generic as possible. I
know that some design pattern should be used for
this. No pattern. There might be patterns, if you say that the DAOs to access the LDAP and RDB are patterns.
Stop thinking patterns and start thinking objects.
(some from GoF , and I know there exists design
patterns specially created for web services as
well).Nope.
Could you enumerate me which patterns (and for what
part of the program) would be the best choice to
solve this problem? I have read through some books
about patterns, but don�t have the knowledge to pick
up the right one for a concrete problem like this..
Thank you in advance,
nagybalyYou haven't read them because they aren't there. Your problem is pretty specific, even if it's common.
% -
What component Should I use?, Jpanel doesn't work
Hi
I need a program that has a window that can go fullscreen and windowed (I did that with a Jframe in fullscreen mode with a jpnale and a 800x600 Jpanel and destroying them with an object that maneges them), I did it with a jframe that contained a Jpanel, I used a Jpanel to avoid the flickering on the screen but I also need to change the font type and the font size, but the setFont on the Jpanel doesn't change the font (as I have realized and also read here [http://forum.java.sun.com/thread.jspa?forumID=257&threadID=150588] ), so I'm lost, I might have to redo the whole thing, but I just wanted to know what component should I use for a window that is going to have custom graphics and need diffrent fonts and diffrent font sizes and work in fullscreen without flickering
Thank you for your attention, I would aprecciate any help givenfor example:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class JPanelFont extends JPanel
private Font font = getFont();
private String myString = "Fubars Rule";
private int fontSize = font.getSize();
private JSlider slider = new JSlider(0, 100, fontSize);
public JPanelFont()
setPreferredSize(new Dimension(620, 250));
setLayout(new BorderLayout());
JPanel inputPanel = createInputPanel();
add(inputPanel, BorderLayout.SOUTH);
private JPanel createInputPanel()
JPanel ip = new JPanel();
slider.setMajorTickSpacing(20);
slider.setMinorTickSpacing(5);
slider.setPaintTicks(true);
slider.setPaintLabels(true);
ip.add(slider);
slider.addChangeListener(new ChangeListener()
public void stateChanged(ChangeEvent evt)
fontSize = (Integer)slider.getValue();
repaint();
return ip;
@Override
protected void paintComponent(Graphics g)
Graphics2D g2 = (Graphics2D)g;
Object originalHint = g2.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
super.paintComponent(g2);
myPaint(g2);
g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, originalHint);
private void myPaint(Graphics2D g2)
font = font.deriveFont(Font.BOLD, fontSize);
g2.setFont(font);
g2.drawString(myString, 20, 100);
private static void createAndShowUI()
JFrame frame = new JFrame("Dynamic JPanel Font");
frame.getContentPane().add(new JPanelFont());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
public static void main(String[] args)
java.awt.EventQueue.invokeLater(new Runnable()
public void run()
createAndShowUI();
}Edited by: Encephalopathic on May 21, 2008 9:18 PM -
Hi,
A newbie to SSIS but was able to create an SSIS package which extracts XML data from one of the SQL server columns using "Execute SQL Task" and passes that to a for each loop container which contains an XML task for apply transform to each input
xml and append it to a flat file(additonally using a script task within for each container).
All good so far but now I want to apply conditional splitting to "Execute SQL Task" in the above and additionally pipe it to the exact similar additional process(For each container doing xml task as described above) for a different kind of
flat file.
If I alter the design to use the data flow approach and apply OOTB conditional split, I run into not knowing how to connect and execute more than one foreach container and embedded XML and script task (dataflow to control flow connection)
It is easy to put everything in a sequence container and repeat the Execute SQL Task . But to me that is very inefficient.
Any creative ideas or pointers to some internet content which tells me how can this be done most efficiently.
Hope my question makes sense and let me know if you need more clarification.
Thanks in advance.
SMAs I understand what you're asking for is a way to create conditional branches to do different typeof processing for each subset of data. For this you can do like below
1. Add set of tasks to additional processing for each type of flat file and link them to Execute sql task.
2. Make the precedence constraint option as Expression And Constraint for each of them. Make constraint as OnSuccess and expression based on your condition. You may need to create SSIS variables to capture value of fields to be used in expression manipulation.
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs
Maybe you are looking for
-
Áre de Avaliação não contabiliza
Senhores(as), Preciso de uma ajuda com relação às baixas de ativo imobilizado, o problema é o seguinte: Cenário - Um determinado item, com área principal 01 e áreas de avaliação (reavaliação) 11 e 21. Problema - No momento da baixa, é contabilizado a
-
Can't open document on iPhone from Pages via iCloud
Trying to open a document on iPhone via iCloud only to get the following error messages from within Pages (iOS version): "Opening this document requires an internet connection". Am connected to internet using WiFi and the Documents and Data field is
-
Need help in execution of script
Dear experts, We have a central database 10g installed on windows server 2008. We have 47 sites and each site has its own database. We created Materialized views in central DB which collect data from all 47 sites. We have a script to refresh these Ma
-
Cant "print to pdf" in Windows 8.1 using Outlook, Quickbooks, Word?
I can't "print to pdf" in any of the applications I listed. Seems to have happened after the last Windows update. It also screwed up my ability to connect with a second monitor, but that's a separate problem that has no fix. Anyone have any ideas? I
-
Album Art not coming in iPhone
I have downloaded some music but not from iTunes music store. Now when i have synced my iPhone with Mac,i am not able to get the album art in iPhone which is being displayed in the itunes in my Mac. How can I make it appear in the songs in my iPhone