Swapnil Sonawane

But isn't it that I will have two matching beans for the interface type defined in the class which is going to make use of it eventually. I mean there will be two beans compatible with the interface type, which throws UnsatisfiedDependencyException according to the documentation. Please correct me if I'm wrong.

Thanks,
Swapnil

Hi,

I've a design like below -
Interface Writer { write(); } Class FileWriter implements Writer { void write() { } } Class DatabaseWriter implements Writer { void write() { } } Class Document { void someMethod() { // get FileWriter bean and call its write method first // then get DatabaseWriter bean and call its write method // We should be able to inject one or both of these beans effectively } }
In the absence of DatabaseWriter, I'm currently using getBeanNamesForType method to inject the only available bean. But when I have multiple implementations of the interface, I'm not sure how to do this effectively. Using getBeanNamesForType and iterating over the retrieved list doesn't really look like an elegant way. I want to avoid hard-coding the bean names inside the someMethod(). I'm sure this must be a very common use-case today. What's the standard way of solving this using spring?

Thanks,
Swapnil

I am encountering a problem in using JInternalFrame. I have a JPanel placed inside the content pane of JFrame. It has a button "Show". When I click that button, it opens the JInternalFrame as expected. But the show button stays there for a while, say for a second or two and then it disappears. I wonder why there is that delay. This code is a part of a larger application, so posting code won't help much. But has anybody of you experienced the same behaviour? Thanks.

got it solved after renaming validate() to validateIt()

/********************MainFrame.java ****************/ import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.table.*; import java.beans.*; import javax.swing.border.*; import javax.swing.plaf.metal.*; import java.sql.*; import java.util.ArrayList; /** * @author Swapnil Sonawane */ public class MainFrame extends JFrame { public MainFrame() { importData(); initComponents(); } // Database constants private String url = "jdbc:mysql://localhost:3306/"; // Database URL private String dbName = "library"; // Database name private String driver = "com.mysql.jdbc.Driver"; // Driver name private String userName = "root"; // User name private String password = "chirkut"; // Password private Connection conn; // Database tables attributes public ArrayList<Employee>emp; // GUI attributes private JLabel label1; private JLabel label2; private JLabel label3; private JLabel label4; // more here.. private void initComponents() { MainFrameListener mainFrameListener = new MainFrameListener(this); menuBar1 = new JMenuBar(); menu5 = new JMenu(); // so on.. //======== this ======== setTitle("Library Time Manager 1.0"); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setResizable(false); loginPanel = new LoginPanel(this); infoScreen = new InformationScreen(this); arenaPanel = new ArenaPanel(this); staticDetails = new StaticDetails(this); recordBook = new RecordBook(this); statistics = new Statistics(this); shiftScheduler = new ShiftScheduler(this); Toolkit theKit = (new JFrame()).getToolkit(); screenSize = theKit.getScreenSize(); BorderLayout border = new BorderLayout(screenSize.width/5,screenSize.height/8); getContentPane().setLayout(border); getContentPane().add(label1, BorderLayout.WEST); getContentPane().add(label2, BorderLayout.NORTH); getContentPane().add(label3, BorderLayout.SOUTH); getContentPane().add(loginPanel, BorderLayout.CENTER); getContentPane().add(label4, BorderLayout.EAST); loginPanel.setVisible(true); infoScreen.setVisible(false); arenaPanel.setVisible(false); staticDetails.setVisible(false); recordBook.setVisible(false); statistics.setVisible(false); shiftScheduler.setVisible(false); //now the menu bar ======== { //======== menu5 ======== { menu5.setText("GoTo"); menu5.add(menuItem11); menuItem11.setText("Arena"); menuItem11.addActionListener(mainFrameListener); menuItem11.setActionCommand("Arena"); menuItem11.setEnabled(false); menuItem12.setText("Information Screen"); menuItem12.setEnabled(false); // so on .. but i have only added the mainFrameListener for menu items.


/***************** MainFrameListener.java *************/

import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.table.*; /** * @author Swapnil Sonawane */ public class MainFrameListener implements ActionListener { private MainFrame mainFrame; public MainFrameListener(MainFrame frame) { mainFrame = frame; } public void actionPerformed(ActionEvent evt) { String actionCommand = evt.getActionCommand(); if(actionCommand.equals("EXIT")) { System.exit(0); } else if (actionCommand.equals("Information Screen")){ mainFrame.getInfoScreen();//RadioButton Info Screen is Clicked } else if(actionCommand.equals("Arena")){ mainFrame.getArena(); // RadioButton Arena is selected } else if(actionCommand.equals("STATIC")) { mainFrame.getStaticDetails(); } else if(actionCommand.equals("SCREEN")) { mainFrame.editInfoScreen(); } else if(actionCommand.equals("RECORD")) { mainFrame.getRecordBook(); } else if(actionCommand.equals("STATISTICS")) { mainFrame.getStatistics(); } else if(actionCommand.equals("SHIFT")) { mainFrame.getShiftScheduler(); } else if(actionCommand.equals("About")){ String about=" Library Time Manager 1.0 \n\n An Application To Manage Staff Details \n\n\n Developed By: NITD_Developers"; JOptionPane.showMessageDialog(mainFrame,about); } else if(actionCommand.equals("Help Topics")){ mainFrame.openHelpWindow(); } else if(actionCommand.equals("Credits")) { String credits= " Library Time Manager 1.0 \n\n\n Developed By:NITD_developers"; JOptionPane.showMessageDialog(mainFrame,credits); } else if(actionCommand.equals("Settings")) { mainFrame.openPrefsWindow(); } } }
The problem is that once I visit ArenaPanel, I mean click on that menu and then move to other panels, clicking on any other menu options in the MainFrame menu bar activates that button and it listens to ArenaListener. I tried to debug but didn't get it. It's strange.
I am trying to say that even if I remove the save button from the arenapanel the job that should be done after clicking on save button is done without clicking on it and clicking somewhere else in the menu bar. And this happens after I visit arenapanel once and not before that. Strange enough for me



Thanks.
[ October 14, 2008: Message edited by: Swapnil Sonawane ]

/************* ArenaListener.java *******************/

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;


/**
* @author Swapnil Sonawane
*/

public class ArenaListener implements ActionListener {

ArenaPanel arenaPanel;

public ArenaListener(ArenaPanel panel) {
arenaPanel = panel;
}

public void actionPerformed(ActionEvent evt) {

String actionCommand = evt.getActionCommand();
if(actionCommand.equals("SAVE")) {
arenaPanel.validate();
}

else if(actionCommand.equals("RESET")) {
arenaPanel.clear();
}

else if(actionCommand.equals("ACT")) {
int selectedIndex = arenaPanel.getActivityIndex();
if((selectedIndex==1) || (selectedIndex==2)) {
arenaPanel.enableDescription(false);
arenaPanel.enableExplanation(false);
arenaPanel.enableTimeFields(false);
}
else {
arenaPanel.enableDescription(true);
arenaPanel.enableExplanation(true);
arenaPanel.enableTimeFields(true);
}

}

}
}

I have 4 java files:

MainFrame.java
MainFrameListener.java
ArenaPanel.java
ArenaListener.java

MainFrame extends JFrame and is the main window of my application. ArenaPanel is one of the several panels I have. MainFrame has a menu bar which has menu buttons to go to different panels. The arenaPanel has a SAVE button, actions for which have been defined in arenaListener. Actions for MainFrame menu have been defined in MainFrameListener. Here are my codes. I have removed the irrelavent parts at places as the codes are very long.

/**************** ArenaPanel.java *************/
import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.util.Calendar; import java.sql.*; /** * @author Swapnil Sonawane */ public class ArenaPanel extends JPanel { private MainFrame parentFrame; private String[] values; private Connection conn; private int delay; private String expectedTime; private DefaultListModel model; private DefaultComboBoxModel model2, model3; private String hh, mm, ss; private int h,m,s; public ArenaPanel(MainFrame mainFrame) { parentFrame = mainFrame; initComponents(); } public int getActivityIndex() { return comboBox2.getSelectedIndex(); } public void enableDescription(boolean myBoolean) { comboBox1.setEnabled(myBoolean); } public void enableTimeFields(boolean myBoolean) { comboBox3.setEnabled(myBoolean); comboBox4.setEnabled(myBoolean); textField1.setEnabled(myBoolean); textField2.setEnabled(myBoolean); } public void enableExplanation(boolean myBoolean) { textArea1.setEnabled(myBoolean); } private void initComponents() { ArenaListener arenaListener = new ArenaListener(this); conn = parentFrame.getConnection(); label1 = new JLabel(); scrollPane1 = new JScrollPane(); label2 = new JLabel(); label3 = new JLabel(); label4 = new JLabel(); comboBox1 = new JComboBox(); label5 = new JLabel(); comboBox2 = new JComboBox(); comboBox5 = new JComboBox(); label6 = new JLabel(); label7 = new JLabel(); scrollPane3 = new JScrollPane(); textArea1 = new JTextArea(); comboBox3 = new JComboBox(); comboBox4 = new JComboBox(); label8 = new JLabel(); textField1 = new JTextField(); label9 = new JLabel(); label10 = new JLabel(); textField2 = new JTextField(); saveButton = new JButton(); label11 = new JLabel(); button2 = new JButton(); label13 = new JLabel(); label12 = new JLabel(); model = new DefaultListModel(); list1 = new JList(model); //======== this ======== setLayout(null); //---- label1 ---- label1.setText("Library Arena"); label1.setHorizontalAlignment(SwingConstants.CENTER); label1.setFont(new Font("Levenim MT", Font.BOLD, 18)); add(label1); label1.setBounds(200, 25, 195, label1.getPreferredSize().height); //======== scrollPane1 ======== { //---- list1 ---- model.addElement("-----Select-----"); for(int i=0;i<parentFrame.emp.size();i++) { model.addElement(parentFrame.emp.get(i).getFirstName()+" "+parentFrame.emp.get(i).getLastName()); } list1.setFont(new Font("Levenim MT", Font.BOLD, 12)); list1.setSelectedIndex(0); scrollPane1.setViewportView(list1); } add(scrollPane1); scrollPane1.setBounds(50, 120, 150, 185); //---- label2 ---- label2.setText("Select Employee"); label2.setHorizontalAlignment(SwingConstants.CENTER); label2.setFont(new Font("Tahoma", Font.BOLD, 12)); add(label2); label2.setBounds(45, 90, 135, label2.getPreferredSize().height); //---- label3 ---- label3.setText("Activity"); label3.setFont(new Font("Levenim MT", Font.BOLD, 12)); label3.setHorizontalAlignment(SwingConstants.CENTER); add(label3); label3.setBounds(255, 90, 75, label3.getPreferredSize().height); //---- button1 ---- saveButton.setText("Save"); saveButton.addActionListener(arenaListener); saveButton.setActionCommand("SAVE"); add(saveButton); saveButton.setBounds(230, 445, 60, 30); //---- label11 ---- label11.setText(" Shift ID "); label11.setFont(new Font("Levenim MT", Font.BOLD, 12)); add(label11); label11.setBounds(70, 330, 90, 18); //---- RESET button ---- button2.setText("Reset"); add(button2); button2.setActionCommand("RESET"); button2.addActionListener(arenaListener); button2.setBounds(310, 445, 65, 30); //---- label12 ---- add(comboBox5); comboBox5.setBounds(135, 330, 45, comboBox5.getPreferredSize().height); comboBox5.setModel(new DefaultComboBoxModel(new String[] { "1", "2", "3", })); comboBox5.addActionListener(arenaListener); comboBox5.setActionCommand("ACT"); //---- label13 ---- label13.setText("text"); label13.setFont(new Font("Verdana", Font.BOLD, 12)); add(label13); label13.setBounds(425, 125, 90, 20); setPreferredSize(new Dimension(620, 515)); // JFormDesigner - End of component initialization //GEN-END:initComponents javax.swing.Timer t = new javax.swing.Timer(1000, new ClockListener()); t.start(); } public int isInputValid() { // Check if activity has been selected or not if(comboBox2.getSelectedIndex()==0) { return 1; } // Check if Description is needed and has been selected or not if(((comboBox2.getSelectedIndex()>2))&&(comboBox1.getSelectedIndex()==0)) { return 2; } // Check if any employee has been selected or not if(list1.getSelectedIndex() <= 0) { return 3; } return 0; } public void validate() { int returnCode = isInputValid(); switch(returnCode) { // The input is valid. Submit the information. case 0: submitInfo(); break; // Activity has not been selected. case 1: JOptionPane.showMessageDialog(null,"You have not selected any Activity."); break; // Description has not been selected. case 2: JOptionPane.showMessageDialog(null,"You have not selected any Description."); break; // Employee has not been selected. case 3: JOptionPane.showMessageDialog(null,"You have not selected any Employee."); break; } } public void clear () { //Use this method to clear all fields in ArenaPanel //ActionPerformed in case of Reset Button JOptionPane.showMessageDialog(null,"cleared"); comboBox2.setSelectedIndex(0); comboBox1.setSelectedIndex(0); comboBox3.setSelectedIndex(0); comboBox4.setSelectedIndex(0); enableDescription(true); enableExplanation(true); enableTimeFields(true); list1.setSelectedIndex(0); textArea1.setText(""); textField1.setText("0"); textField2.setText("0"); } private JLabel label1; private JScrollPane scrollPane1; private JList list1; // so on . . .not all mentioned here // JFormDesigner - End of variables declaration //GEN-END:variables }

I have edited my original code. But now I have switched to GridBagLayout (code not posted). After I include that in the JFrame, it is getting packed, but I don't want that and I haven't done the packing in the code.

I have rectified that part already. But I have some other doubt. Changing the location of LoginPane using setLocation or setBounds method doesn't change its location. Why does this happen?

I will clean up and post something that makes sense. I have to get the things clear.

1) Instead of having those labels and textfields in the loginpanel, I had created an instance of JPanel inside the LoginPanel. This happened because I made a mistake while using the GUI builder. I will rectify this now.
[ October 09, 2008: Message edited by: Swapnil Sonawane ]

Here is my code:

ApplicationDriver.java
// application import java.awt.*; import javax.swing.*; public class ApplicationDriver { // The application window static MainFrame window; public static void main(String[] args) { // Create the app window try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { } window = new MainFrame(); // Get the window toolkit Toolkit theKit = window.getToolkit(); // Get screen size Dimension wndSize = theKit.getScreenSize(); window.setBounds(0,0,wndSize.width, wndSize.height); LoginPanel contentPane = new LoginPanel(); contentPane.setVisible(true); window.getContentPane().add(contentPane); window.setVisible(true); window.setResizable(false); } }


MainFrame.java

import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.table.*; /** * @author Swapnil Sonawane */ public class MainFrame extends JFrame { public MainFrame() { initComponents(); } private void menuItem9MouseClicked(MouseEvent e) { // TODO add your code here } private void menuItem9ActionPerformed(ActionEvent e) { // TODO add your code here } private void initComponents() { // JFormDesigner - Component initialization - DO NOT MODIFY //GEN-BEGIN:initComponents // Generated using JFormDesigner Evaluation license - Swapnil Sonawane menuBar1 = new JMenuBar(); menu5 = new JMenu(); radioButtonMenuItem1 = new JRadioButtonMenuItem(); radioButtonMenuItem2 = new JRadioButtonMenuItem(); menuItem1 = new JMenuItem(); menu2 = new JMenu(); menu1 = new JMenu(); menuItem2 = new JMenuItem(); menuItem3 = new JMenuItem(); menuItem4 = new JMenuItem(); menu3 = new JMenu(); menu6 = new JMenu(); menuItem5 = new JMenuItem(); menuItem6 = new JMenuItem(); menuItem10 = new JMenuItem(); menu4 = new JMenu(); menuItem7 = new JMenuItem(); menuItem8 = new JMenuItem(); menuItem9 = new JMenuItem(); //======== this ======== setTitle("Library Time Manager 1.0"); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setResizable(false); LoginPanel contentPane = new LoginPanel(); contentPane.setVisible(true); setContentPane(contentPane); { // compute preferred size Dimension preferredSize = new Dimension(); for(int i = 0; i < contentPane.getComponentCount(); i++) { Rectangle bounds = contentPane.getComponent(i).getBounds(); preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width); preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height); } Insets insets = contentPane.getInsets(); preferredSize.width += insets.right; preferredSize.height += insets.bottom; contentPane.setMinimumSize(preferredSize); contentPane.setPreferredSize(preferredSize); } setLocationRelativeTo(getOwner()); //---- buttonGroup1 ---- ButtonGroup buttonGroup1 = new ButtonGroup(); buttonGroup1.add(radioButtonMenuItem1); buttonGroup1.add(radioButtonMenuItem2); // JFormDesigner - End of component initialization //GEN-END:initComponents } // JFormDesigner - Variables declaration - DO NOT MODIFY //GEN-BEGIN:variables private JMenuBar menuBar1; private JMenu menu5; private JRadioButtonMenuItem radioButtonMenuItem1; private JRadioButtonMenuItem radioButtonMenuItem2; private JMenuItem menuItem1; private JMenu menu2; private JMenu menu1; private JMenuItem menuItem2; private JMenuItem menuItem3; private JMenuItem menuItem4; private JMenu menu3; private JMenu menu6; private JMenuItem menuItem5; private JMenuItem menuItem6; private JMenuItem menuItem10; private JMenu menu4; private JMenuItem menuItem7; private JMenuItem menuItem8; private JMenuItem menuItem9; // JFormDesigner - End of variables declaration //GEN-END:variables }


LoginPanel.java

import javax.swing.*; /** * @author Swapnil Sonawane */ public class LoginPanel extends JPanel { public LoginPanel() { initComponents(); } private void initComponents() { // JFormDesigner - Component initialization - DO NOT MODIFY //GEN-BEGIN:initComponents // Generated using JFormDesigner Evaluation license - Swapnil Sonawane label1 = new JLabel(); label2 = new JLabel(); passwordField1 = new JPasswordField(); button1 = new JButton(); button2 = new JButton(); //======== this ======== //---- label1 ---- label1.setText("Enter the password to proceed . ."); label1.setHorizontalAlignment(SwingConstants.CENTER); //---- label2 ---- label2.setText("Password:"); //---- button1 ---- button1.setText("Enter"); //---- button2 ---- button2.setText("Quit"); GroupLayout layout = new GroupLayout(this); setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup() .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup() .addGroup(layout.createSequentialGroup() .addGap(93, 93, 93) .addComponent(label1, GroupLayout.PREFERRED_SIZE, 212, GroupLayout.PREFERRED_SIZE)) .addGroup(layout.createSequentialGroup() .addGap(117, 117, 117) .addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING, false) .addGroup(layout.createSequentialGroup() .addComponent(button1) .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(button2)) .addGroup(layout.createSequentialGroup() .addComponent(label2, GroupLayout.PREFERRED_SIZE, 78, GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addComponent(passwordField1, GroupLayout.PREFERRED_SIZE, 67, GroupLayout.PREFERRED_SIZE))))) .addContainerGap(95, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup() .addGroup(layout.createSequentialGroup() .addGap(35, 35, 35) .addComponent(label1) .addGap(55, 55, 55) .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE) .addComponent(label2) .addComponent(passwordField1, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)) .addGap(63, 63, 63) .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE) .addComponent(button1) .addComponent(button2)) .addContainerGap(90, Short.MAX_VALUE)) ); // JFormDesigner - End of component initialization //GEN-END:initComponents } private JLabel label1; private JLabel label2; private JPasswordField passwordField1; private JButton button1; private JButton button2; // JFormDesigner - End of variables declaration //GEN-END:variables }


But I do not get the JPanel inside the JFrame. I can only see the JFrame. I am confused a lot.


EDIT 1: LoginPanel.java and MainFrame.java updated and irrelavent code removed. I got the JPanel inside the JFrame. How can I position it to the center? What if I want to change the content pane? Would simply creating an instance of some other JPanel like LoginPanel and passing it to setContentPane do?

[ October 09, 2008: Message edited by: Swapnil Sonawane ]
[ October 09, 2008: Message edited by: Swapnil Sonawane ]

Congratulations Priya

Vishal, Please modify your name according to Javaranch naming policy.
[ June 28, 2008: Message edited by: Swapnil Sonawane ]

Please modify your name according to Javaranch naming policy.

Please post it somewhere else. This forum is for SCJP certification.