Welcome to the Java Programming Forums


The professional, friendly Java community. 21,500 members and growing!


The Java Programming Forums are a community of Java programmers from all around the World. Our members have a wide range of skills and they all have one thing in common: A passion to learn and code Java. We invite beginner Java programmers right through to Java professionals to post here and share your knowledge. Become a part of the community, help others, expand your knowledge of Java and enjoy talking with like minded people. Registration is quick and best of all free. We look forward to meeting you.


>> REGISTER NOW TO START POSTING


Members have full access to the forums. Advertisements are removed for registered users.

Results 1 to 9 of 9

Thread: Problems updating an AbstractTableModel

  1. #1
    Junior Member
    Join Date
    Nov 2013
    Posts
    22
    Thanks
    8
    Thanked 0 Times in 0 Posts

    Default Problems updating an AbstractTableModel

    I'm building a database search for a CCG. I have the GUI built with ComboBoxes, TextFields and Buttons that queries a MySQL database when the user presses the search button. All of that is working and spitting the correct information back to the console. Now I'm trying to add a table to display the results to the GUI.

    I used an AbstractTableModel because two of my columns (one for now) are going to display ImageIcons. The table displays correctly with all the information when I start the program and the GUI initially appears. However, I can't get the table to update when I press the search button, which I currently have doing a different search than the initial search. I have the query spitting back the information to the console and it is grabbing the correct and different data from the query, but I can't get the table to update.

    I tried invoking the fireTableDataChanged() method as mentioned in the JavaDocs. I tried repainting, not creating the table initially, etc. None of it is working and I feel like there is a simple mistake or concept I am getting wrong.

    public class SSCCE extends JFrame {
     
            String imageString;
            ImageIcon setIcon;
     
            static String dbUsername = "...";
            static String dbPassword = "...";
            static String dbName = "...";
            static ResultSet rs;
     
            JButton buttonSearch = new JButton("Search");
            JPanel panel = new JPanel();
     
            Connection conn = null;
     
            List<SpiritData> sqlSearchResultsTable = new ArrayList<>();
     
    //---------------------------------------------------------------------------------------------------------
     
            public SSCCE() {
     
                    panel.setLayout(new MigLayout(
                            "debug 0, insets 15, gapy 5", 
                                "[80, right] 5 [105] 16 [80, right] 5 [105] 16"   +
                                "[80, right] 5 [60] 5 [60] 16"   +
                                "[80, right] 5 [60] 5 [60] 16"   +
                                "[80, right] 5 [105] 16 [80, right] 5 [105]",
                            "[align center]"));
     
                    try {
                            Class.forName("com.mysql.jdbc.Driver");
                            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/" + dbName, dbUsername, dbPassword);
                            Statement sqlState = conn.createStatement();
                            String selectStuff = "SELECT * FROM swdbtest.spiritdatabase2 WHERE ActivationCost = 8";
                            rs = sqlState.executeQuery(selectStuff);
     
                            while(rs.next()){
                                    String sqlType = rs.getString("Type");
                                    String sqlHomeland = rs.getString("Homeland");
                                    String sqlName = rs.getString("Name");
                                    String sqlReleaseSet = rs.getString("ReleaseSet");
     
                                    System.out.println(sqlName);
     
                                    setIcon = getImage(sqlReleaseSet + ".png");
     
                                    sqlSearchResultsTable.add(new SpiritData(sqlType, sqlHomeland, sqlName, setIcon));
     
                            } 
                    }
                    catch (SQLException ex) {
                            System.out.println("SQLException: " + ex.getMessage());
                            System.out.println("VendorError: " + ex.getErrorCode()); }
                    catch (ClassNotFoundException e) {
                         e.printStackTrace();
                    }
     
                    SpiritTableModel model = new SpiritTableModel(sqlSearchResultsTable);
                    JTable table = new JTable(model);
     
                    panel.add(buttonSearch, "wrap");
                        buttonSearch.addActionListener(new java.awt.event.ActionListener() {
                        public void actionPerformed(java.awt.event.ActionEvent evt) {
                            buttonSearchActionPerformed(evt);
                            //table.fireTableDataChanged();   //<---- doesn't work
                            }
                        });
     
                    panel.add(new JScrollPane(table), "growx, spanx");
     
                    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     
                    add(panel);
                    pack();
                    setLocationRelativeTo(null);
                    setVisible(true);
                }
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        private void buttonSearchActionPerformed(ActionEvent evt) {
                try {
                            Class.forName("com.mysql.jdbc.Driver");
                            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/" + dbName, dbUsername, dbPassword);
                            Statement sqlState = conn.createStatement();
                            String selectStuff = "SELECT * FROM swdbtest.spiritdatabase2 WHERE ActivationCost BETWEEN 9 AND 10";
                            rs = sqlState.executeQuery(selectStuff);
     
                            while(rs.next()){
                                    String sqlType = rs.getString("Type");
                                    String sqlHomeland = rs.getString("Homeland");
                                    String sqlName = rs.getString("Name");
                                    String sqlReleaseSet = rs.getString("ReleaseSet");
     
                                    System.out.println(sqlName);
     
                                    setIcon = getImage(sqlReleaseSet + ".png");
     
                                    sqlSearchResultsTable.add(new SpiritData(sqlType, sqlHomeland, sqlName, setIcon));
     
                                    //UPDATE TABLE ?????????????????
                                    //table.fireTableDataChanged();   //<---- doesn't work
                            } }
                    catch (SQLException ex) {
                            System.out.println("SQLException: " + ex.getMessage());
                            System.out.println("VendorError: " + ex.getErrorCode()); }
                    catch (ClassNotFoundException e) {
                         e.printStackTrace();
                    }
        }
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        private ImageIcon getImage(String path)
        {
            java.net.URL url = getClass().getResource(path);
            if (url != null)
                return (new ImageIcon(url));
            else
            {
                return null;
            }
        }
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        public class SpiritData {
     
            private String spiritType;
            private String spiritHomeland;
            private String spiritName;
            private ImageIcon spiritReleaseSet;
     
            public SpiritData(String spiritType, String spiritHomeland, String spiritName, ImageIcon spiritReleaseSet) {
                this.spiritType = spiritType;
                this.spiritHomeland = spiritHomeland;
                this.spiritName = spiritName;
                this.spiritReleaseSet = spiritReleaseSet;
            }
     
            public String getSpiritType() {
                return spiritType;
            }
            public String getSpiritHomeland() {
                return spiritHomeland;
            }
            public String getSpiritName() {
                return spiritName;
            }
            public ImageIcon getSpiritReleaseSet() {
                return spiritReleaseSet;
            }
     
        }
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        public class SpiritTableModel extends AbstractTableModel {
     
            private List<SpiritData> spiritTable;
     
            public SpiritTableModel(List<SpiritData> spTable) {
                this.spiritTable = new ArrayList<>(spTable);
            }
     
            @Override
            public int getRowCount() {
                return spiritTable.size();
            }
     
            @Override
            public int getColumnCount() {
                return 4;
            }
     
            @Override
            public String getColumnName(int column) {
                String name = "??";
                switch (column) {
                    case 0:
                        name = "Type";
                        break;
                    case 1:
                        name = "Homeland";
                        break;
                    case 2:
                        name = "Name";
                        break;
                    case 3:
                        name = "Set";
                        break;
                }
                return name;
            }
     
            @Override
            public Class<?> getColumnClass(int columnIndex) {
                Class type = String.class;
                if(columnIndex == 3) {
                    type = ImageIcon.class;
                }
                return type;
            }
     
            @Override
            public Object getValueAt(int rowIndex, int columnIndex) {
                SpiritData cellValue = spiritTable.get(rowIndex);
                Object value = null;
                switch (columnIndex) {
                    case 0:
                        value = cellValue.getSpiritType();
                        break;
                    case 1:
                        value = cellValue.getSpiritHomeland();
                        break;
                    case 2:
                        value = cellValue.getSpiritName();
                        break;
                    case 3:
                        value = cellValue.getSpiritReleaseSet();
                        break;
                }
                return value;
            }
     
        }        
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        public static void main(String[] args) {
            new SSCCE();
        }
    }


  2. #2
    Administrator copeg's Avatar
    Join Date
    Oct 2009
    Location
    US
    Posts
    5,355
    Thanks
    182
    Thanked 833 Times in 776 Posts
    Blog Entries
    5

    Default Re: Problems updating an AbstractTableModel

    SpiritTableModel model = new SpiritTableModel(sqlSearchResultsTable);//creates a new TableModel
    ...
     
    sqlSearchResultsTable.add(new SpiritData(sqlType, sqlHomeland, sqlName, setIcon));//adds data to the sqlSearchResultsTable List
     
    ...
     
            private List<SpiritData> spiritTable;
     
            public SpiritTableModel(List<SpiritData> spTable) {
                this.spiritTable = new ArrayList<>(spTable);//creates a copy of sqlSearchResultsTable
            }

    You should make sure the List that backs the TableModel actually contains what you want (via a debugger or println). Looks to me like your TableModel creates a new instance of a List for it's data, initially containing the data from the first query. Any later changes to sqlSearchResultsTable will not be reflected in spiritTable (and hence, the TableModel which is backed by that List).

  3. The Following User Says Thank You to copeg For This Useful Post:

    Psyclone625 (December 8th, 2013)

  4. #3
    Member andbin's Avatar
    Join Date
    Dec 2013
    Location
    Italy
    Posts
    443
    Thanks
    4
    Thanked 122 Times in 114 Posts

    Default Re: Problems updating an AbstractTableModel

    Quote Originally Posted by Psyclone625 View Post
    I used an AbstractTableModel because two of my columns (one for now) are going to display ImageIcons. The table displays correctly with all the information when I start the program and the GUI initially appears. However, I can't get the table to update when I press the search button, which I currently have doing a different search than the initial search. I have the query spitting back the information to the console and it is grabbing the correct and different data from the query, but I can't get the table to update.
    Your SpiritTableModel seems correct, at first sight. But the problem is that you are updating the original list sqlSearchResultsTable which is not the list contained in the table model.
    The SpiritTableModel constructor, creates a new ArrayList, "cloning" (in the simple sense of duplicating) the list from the received list. Thus a modification to the original list has no effect.


    If you want to add one SpiritData to your table model, define a method like:

    public void addSpiritData(SpiritData sd)

    in the SpiritTableModel. In this method: 1) add to the list and 2) invoke the fireTableRowsInserted(int firstRow, int lastRow) (you have to determine the index of the new row, but it's easy).


    If you want to replace totally the list in your table model, define a method like:

    public void setSpiritDataList(List<SpiritData> spTable)

    in the SpiritTableModel. In this method: 1) assign the new list (it's a good idea to "clone" like you have done in the constructor) and 2) invoke fireTableDataChanged()
    Andrea, www.andbin.net SCJP 5 (91%) SCWCD 5 (94%)

    Useful links for Java beginners My new project Java Examples on Google Code

  5. The Following User Says Thank You to andbin For This Useful Post:

    Psyclone625 (December 8th, 2013)

  6. #4
    Junior Member
    Join Date
    Nov 2013
    Posts
    22
    Thanks
    8
    Thanked 0 Times in 0 Posts

    Default Re: Problems updating an AbstractTableModel

    First of all, thank you for trying to help me and I apologize for not fully understanding everything. I think I understand what you're saying, but I am trying to track down where I am going wrong.

    I took the entire MySQL query try-catch out of the constructor. I only put it in there to test whether I was getting anything into the table and then to see if I could refresh it. I could see that I was initially building the objects, but wasn't able to update them.

    I took your advice and am using println to debug try to follow what is happening. I usually try to use println as much as I can to debug, but I forgot that I can use it to see the Objects address. I was only using it to look at variables. After removing the initial try-catch which was populating the table in the constructor, here's what I'm seeing when I walk through it.

    In the constructor...

    1) Creating new SpiritTableModel model (an AbstractTableModel) with data from the sqlSearchResultsTable (which is currently null/blank/empty).
    2) Create new JTable with model as the TableModel.
    3) Add Search button and table to the GUI (JFrame)

    Initially, I just have a button and an empty table. When the SEARCH button is pressed...

    4) sqlSearchResultsTable.clear(); to clear the ArrayList (I noticed that I wasn't doing this in my initial code and was just appending the old search results).
    5) Query MySQL and use the while(rs.next()) loop to grab each line of the result set and append an object of class.SpiritData to the sqlSearchResults ArrayList.
    6) ??? update model ???

    If all that is correct, I guess here's where I'm stuck...

    I don't understand the TableModels enough obviously. Here's what I think I'm supposed to do...

    After the resultset while-loop completes building the ArrayList, and prior to exiting the try-block, update model (a SpiritTableModel) without creating a new model object? If so, is there a built-in method for that?

    Is that correct? Or have I screwed up long before that? LOL

    By the way, here's the updated version of my code. Everything is pretty much the same, but I removed MySQL query try-catch out of the constructor and added the arraylist.clear() method to the beginning of my try-catch in the search button's actionevent.

    public class SSCCE1 extends JFrame {
     
            String imageString;
            ImageIcon setIcon;
     
            static String dbUsername = "root";
            static String dbPassword = "...";
            static String dbName = "swdbtest";
            static ResultSet rs;
     
            JButton buttonSearch = new JButton("Search");
            JPanel panel = new JPanel();
     
            Connection conn = null;
     
            List<SpiritData> sqlSearchResultsTable = new ArrayList<>();
     
    //---------------------------------------------------------------------------------------------------------
     
            public SSCCE1() {
     
                    panel.setLayout(new MigLayout(
                            "debug 0, insets 15, gapy 5", 
                                "[80, right] 5 [105] 16 [80, right] 5 [105] 16"   +
                                "[80, right] 5 [60] 5 [60] 16"   +
                                "[80, right] 5 [60] 5 [60] 16"   +
                                "[80, right] 5 [105] 16 [80, right] 5 [105]",
                            "[align center]"));
     
    System.out.println("sqlSearchResultsTable #1 = " + sqlSearchResultsTable);
                    SpiritTableModel model = new SpiritTableModel(sqlSearchResultsTable);
     
    System.out.println("Model #1:  " + model);
                    JTable table = new JTable(model);
     
     
     
                    panel.add(buttonSearch, "wrap");
                        buttonSearch.addActionListener(new java.awt.event.ActionListener() {
                        public void actionPerformed(java.awt.event.ActionEvent evt) {
                            buttonSearchActionPerformed(evt);
                            }
                        });
     
                    panel.add(new JScrollPane(table), "growx, spanx");
     
                    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     
                    add(panel);
                    pack();
                    setLocationRelativeTo(null);
                    setVisible(true);
                }
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        private void buttonSearchActionPerformed(ActionEvent evt) {
                try {
                            Class.forName("com.mysql.jdbc.Driver");
                            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/" + dbName, dbUsername, dbPassword);
                            Statement sqlState = conn.createStatement();
                            String selectStuff = "SELECT * FROM swdbtest.spiritdatabase2 WHERE ActivationCost BETWEEN 9 AND 10";
                            rs = sqlState.executeQuery(selectStuff);
     
                            sqlSearchResultsTable.clear();
     
                            while(rs.next()){
                                    String sqlType = rs.getString("Type");
                                    String sqlHomeland = rs.getString("Homeland");
                                    String sqlName = rs.getString("Name");
                                    String sqlReleaseSet = rs.getString("ReleaseSet");
     
                                    setIcon = getImage(sqlReleaseSet + ".png");
     
    System.out.println("sqlSearchResultsTable #2 = " + sqlSearchResultsTable);
                                    sqlSearchResultsTable.add(new SpiritData(sqlType, sqlHomeland, sqlName, setIcon));
    System.out.println("sqlSearchResultsTable #3 = " + sqlSearchResultsTable);
     
                            } 
     
                            // UPDATE MODEL
     
     
                    }
                    catch (SQLException ex) {
                            System.out.println("SQLException: " + ex.getMessage());
                            System.out.println("VendorError: " + ex.getErrorCode()); }
                    catch (ClassNotFoundException e) {
                         e.printStackTrace();
                    }
        }
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        private ImageIcon getImage(String path)
        {
            java.net.URL url = getClass().getResource(path);
            if (url != null)
                return (new ImageIcon(url));
            else
            {
                return null;
            }
        }
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        public class SpiritData {
     
            private String spiritType;
            private String spiritHomeland;
            private String spiritName;
            private ImageIcon spiritReleaseSet;
     
            public SpiritData(String spiritType, String spiritHomeland, String spiritName, ImageIcon spiritReleaseSet) {
                this.spiritType = spiritType;
                this.spiritHomeland = spiritHomeland;
                this.spiritName = spiritName;
                this.spiritReleaseSet = spiritReleaseSet;
            }
     
            public String getSpiritType() {
                return spiritType;
            }
            public String getSpiritHomeland() {
                return spiritHomeland;
            }
            public String getSpiritName() {
                return spiritName;
            }
            public ImageIcon getSpiritReleaseSet() {
                return spiritReleaseSet;
            }
     
        }
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        public class SpiritTableModel extends AbstractTableModel {
     
            private List<SpiritData> spiritTable;
     
            public SpiritTableModel(List<SpiritData> spTable) {
                this.spiritTable = new ArrayList<>(spTable);
            }
     
            @Override
            public int getRowCount() {
                return spiritTable.size();
            }
     
            @Override
            public int getColumnCount() {
                return 4;
            }
     
            @Override
            public String getColumnName(int column) {
                String name = "??";
                switch (column) {
                    case 0:
                        name = "Type";
                        break;
                    case 1:
                        name = "Homeland";
                        break;
                    case 2:
                        name = "Name";
                        break;
                    case 3:
                        name = "Set";
                        break;
                }
                return name;
            }
     
            @Override
            public Class<?> getColumnClass(int columnIndex) {
                Class type = String.class;
                if(columnIndex == 3) {
                    type = ImageIcon.class;
                }
                return type;
            }
     
            @Override
            public Object getValueAt(int rowIndex, int columnIndex) {
                SpiritData cellValue = spiritTable.get(rowIndex);
                Object value = null;
                switch (columnIndex) {
                    case 0:
                        value = cellValue.getSpiritType();
                        break;
                    case 1:
                        value = cellValue.getSpiritHomeland();
                        break;
                    case 2:
                        value = cellValue.getSpiritName();
                        break;
                    case 3:
                        value = cellValue.getSpiritReleaseSet();
                        break;
                }
                return value;
            }
     
        }        
     
    // --------------------------------------------------------------------------------------------------------------------    
     
        public static void main(String[] args) {
            new SSCCE1();
        }
    }


    --- Update ---

    Hey andbin, thanks for the reply. I just saw it. Every time a user presses the search button, I want to replace totally the list in my table model. I will never be appending the current table.

  7. #5
    Member andbin's Avatar
    Join Date
    Dec 2013
    Location
    Italy
    Posts
    443
    Thanks
    4
    Thanked 122 Times in 114 Posts

    Default Re: Problems updating an AbstractTableModel

    Quote Originally Posted by Psyclone625 View Post
    If all that is correct, I guess here's where I'm stuck...

    I don't understand the TableModels enough obviously. Here's what I think I'm supposed to do...

    After the resultset while-loop completes building the ArrayList, and prior to exiting the try-block, update model (a SpiritTableModel) without creating a new model object? If so, is there a built-in method for that?
    First, you should not create a new table model instance every time, it would be a waste of time and resources. Just manipulate the datas in your current table model instance.

    And when you say "is there a built-in method for that?", well, these methods are up to you. It's you that can create an expanded API for your table model.
    When you extend AbstractTableModel you have to redefine some methods (getRowCount(), getColumnCount(), etc...) but these methods are primarily for JTable. You are free (and you should, in your case) to add any other method to manipulate the datas in the table model.

    You can add methods like addSpiritData(SpiritData), removeSpiritDataAt(int index), removeAllSpiritData(), setSpiritDataList(List<SpiritData>), etc...

    These "extra" methods are not for JTable, nor for the contract of TableModel. They are for you to use in the rest of your application! The important thing in these extra methods is that you have to correctly update the internal data structure and then invoke the minimal/right fireXXX method to notify at least the JTable (or any other registered listener) about these modifications.
    Andrea, www.andbin.net SCJP 5 (91%) SCWCD 5 (94%)

    Useful links for Java beginners My new project Java Examples on Google Code

  8. #6
    Junior Member
    Join Date
    Nov 2013
    Posts
    22
    Thanks
    8
    Thanked 0 Times in 0 Posts

    Default Re: Problems updating an AbstractTableModel

    Thanks andbin. I'm about to go to bed right now, but I'll try that tomorrow.

    This is just about the end of my project. Once I get the table working, I'm going to add in a render of the row colors based on the data in column 1. I've already got that to work in another program, so hopefully it won't be too much of a problem. After that, it's ready to go up on the web, which should be another fun obstacle to tackle.

    Thanks again for your help, it is much appreciated. Buona notte

  9. #7
    Junior Member
    Join Date
    Nov 2013
    Posts
    22
    Thanks
    8
    Thanked 0 Times in 0 Posts

    Default Re: Problems updating an AbstractTableModel

    Thanks for all your help guys. It seems to be working correctly finally. It took me a couple days of headaches and a lot of reading and debugging, but I finally got it working.

    I'm not sure if it's 100% correct though as I'm creating a new AbstractTableModel every time. Is this ok? or is it going to create problems down the road?

    My table is not allowed to be edited and the only possible change allowed is to perform a new database search which re-displays the entire table. Rows and columns will never be added or deleted from the current table.

    After someone presses the search button, the program queries MySQL and
    model = new SpiritTableModel(sqlSearchResultsTable);
    table.setModel(model);
    model.fireTableDataChanged();
    setTableProperties();
    table.updateUI();

    I'm not sure if that is enough information, but that's the only real changes I made I think. Here's that entire section of code where the query takes place.

    public void searchSpiritDatabase(String search) {
            try {
                    tableSize = 0;
     
                    Class.forName("com.mysql.jdbc.Driver");
                    connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/" + dbName, dbUsername, dbPassword);
                    statement = connection.createStatement();
     
                    sqlSearchResultsTable.clear();
     
                    resultset = statement.executeQuery(search);
     
                    while(resultset.next())
                        {
                            tableSize++;
                            String sqlType = resultset.getString("Type");
                            String sqlHomeland = resultset.getString("Homeland");
                            String sqlName = resultset.getString("Name");
                            String sqlReleaseSet = resultset.getString("ReleaseSet");
     
                            setIcon = getImage(sqlReleaseSet + ".png");
     
                            sqlSearchResultsTable.add(new SpiritData(sqlType, sqlHomeland, sqlName, setIcon));
                    } 
     
                    if(tableSize == 0) {
                        errorDisplay.setText("The search didn't find any results matching your parameters.  Please try again."); }
                    else if(tableSize == 1){
                        errorDisplay.setText("The search found 1 matching your parameters."); }
                    else {
                        errorDisplay.setText("The search found " + tableSize + " results matching your parameters.");
                    }
     
                    model = new SpiritTableModel(sqlSearchResultsTable);
                    table.setModel(model);
                    model.fireTableDataChanged();
                    setTableProperties();
                    table.updateUI();
            }
            catch (SQLException ex) {
                    System.out.println("SQLException: " + ex.getMessage());
                    System.out.println("VendorError: " + ex.getErrorCode()); }
            catch (ClassNotFoundException e) {
                 e.printStackTrace();
            }
    }

  10. #8
    Member andbin's Avatar
    Join Date
    Dec 2013
    Location
    Italy
    Posts
    443
    Thanks
    4
    Thanked 122 Times in 114 Posts

    Default Re: Problems updating an AbstractTableModel

    Quote Originally Posted by Psyclone625 View Post
    model = new SpiritTableModel(sqlSearchResultsTable);
    table.setModel(model);
    This is not bad but creates a new table model on every query. I repeat, it's not wrong by itself.

    Quote Originally Posted by Psyclone625 View Post
    model.fireTableDataChanged();
    This is not necessary, it's useless.

    Quote Originally Posted by Psyclone625 View Post
    setTableProperties();
    I don't known what it do .... it's yours. But for me it's ok.

    Quote Originally Posted by Psyclone625 View Post
    table.updateUI();
    In general, updateUI() in Swing components has to do with Look&Feels. A normal/typical programmer should never use updateUI() .


    Basing on my preceding answers, have you understood that you can add any method you want in your table model to manipulate the datas?
    Andrea, www.andbin.net SCJP 5 (91%) SCWCD 5 (94%)

    Useful links for Java beginners My new project Java Examples on Google Code

  11. #9
    Junior Member
    Join Date
    Nov 2013
    Posts
    22
    Thanks
    8
    Thanked 0 Times in 0 Posts

    Default Re: Problems updating an AbstractTableModel

    You were correct, I didn't need the model.fireTableDataChanged() method which I realized as soon as you said it, it was just old code from my attempt to change the data in the model. Also, my code doesn't require "table.updateUI()" which I didn't realize until I removed it.

    Quote Originally Posted by andbin View Post
    I don't known what it do .... it's yours. But for me it's ok.
    This calls a method of my own where I set the font, row height, individual column widths, column selection allowed, row sorter, column alignment, and eventually other rendering (such as merged cells in certain rows and varying background colors depending on which group a record belongs to.

    Quote Originally Posted by andbin View Post
    Basing on my preceding answers, have you understood that you can add any method you want in your table model to manipulate the datas?
    Yes, actually I did understand what you were saying, but was stuck. I knew I wasn't supposed to create a new model.

    After spending about 16 hours of reading, researching and coding without success, I traced everything back to editing the model and realized the main part I was stuck on was editing and updating the model. That's how I ended up with the following in my code...

    model = new SpiritTableModel(sqlSearchResultsTable);
    table.setModel(model);

    Prior to that, I wasn't creating a NEW model and never used updateUI. I know this isn't the best way, but I was mainly doing this as a way of debugging and to verify that updating the model was actually my problem. This, of course, confirmed it for me.

    After I got something working, I went back and parsed out a lot of the code that I realized wasn't needed and about 50 lines of prinln's. Part of the code I parsed out was the method setValueAt() because when I was creating a new model, it wasn't needed anymore. I can't remember exactly what errors I

    This is why I re-posted again asking how much of a problem that was going to be because I knew that I was going to be creating a new model object every time and resources would be wasted. But I'm not sure how much resources. This is close to being the end of my project except for some rendering and getting the program on a web page. If it ends up being that each model object takes up something small like 1 KB or 1 MB of memory, then my thinking was that someone would have to do hundreds or thousands of searches before it became a resource issue. I'm not even sure if my understanding of resources and creating multiple objects for the same variable/model is correct.

    I'd actually prefer to do this the correct way, but am just completely lost on how to edit the model. Almost every example and document I found online deals with DefaultTableModel or the solution offered to people using AbstractTableModels is to just use DefaultTableModel, which I can't really do since I'm using my own class with Strings and ImageIcons.

    I'm clearly not understanding how to use the AbstratModel API to repopulate the model. I never need to edit a row or cell at a time, but I just can't figure out how to edit the model. Every time I try, I get errors.

Similar Threads

  1. XML and AbstractTableModel
    By Sofaskurk in forum What's Wrong With My Code?
    Replies: 2
    Last Post: December 2nd, 2013, 10:57 AM
  2. AbstractTableModel - Adding rows
    By Drakey in forum AWT / Java Swing
    Replies: 1
    Last Post: April 15th, 2013, 09:33 AM
  3. AbstractTableModel
    By beruska in forum AWT / Java Swing
    Replies: 1
    Last Post: October 25th, 2011, 01:33 PM
  4. Custom Table using AbstractTableModel
    By dumb_terminal in forum AWT / Java Swing
    Replies: 11
    Last Post: November 16th, 2010, 10:02 AM
  5. Difference between Arraylist and Vector in abstractTableModel ?
    By riddhik84 in forum Collections and Generics
    Replies: 2
    Last Post: November 7th, 2009, 04:22 PM