Filtering a JTable in a Java program

Question

I have a little problem about filtering a JTable.

Updating, Adding and Filtering stocks are working fine. When I add stocks, of course it will display on the table. Same with filtering, when I search any letter or word it will display or not depending if the searched product is available.

The problem is like this, when I tried to delete a specific product, it won't delete and an error will be shown as stated below. The error is about the changing of cell colors.

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
at java.util.Vector.elementAt(Vector.java:474)
at javax.swing.table.DefaultTableModel.getValueAt(DefaultTableModel.java:648)
at javax.swing.JTable.getValueAt(JTable.java:2719)
at javax.swing.JTable.prepareRenderer(JTable.java:5720)
at VapeShop.Inventory$1.prepareRenderer(Inventory.java:55)
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2114)
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:2016)
at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1812)
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161)
at javax.swing.JComponent.paintComponent(JComponent.java:777)
at javax.swing.JComponent.paint(JComponent.java:1053)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5217)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1532)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1455)
at javax.swing.RepaintManager.paint(RepaintManager.java:1252)
at javax.swing.JComponent._paintImmediately(JComponent.java:5165)
at javax.swing.JComponent.paintImmediately(JComponent.java:4976)
at javax.swing.RepaintManager$3.run(RepaintManager.java:811)
at javax.swing.RepaintManager$3.run(RepaintManager.java:794)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:794)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:769)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:718)
at javax.swing.RepaintManager.access$1100(RepaintManager.java:62)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1680)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
at java.awt.EventQueue.access$400(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:697)
at java.awt.EventQueue$3.run(EventQueue.java:691)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

I tried removing the code about changing the cell colors but there still an error without stating what line it was. So I don't know what to do about it.

The error code is shown below:

Inventory.java:55 is the "Component c = super.prepareRenderer(r, data, columns);"

itemTable = new JTable(model){
        public boolean isCellEditable(int data, int columns){
            return false;                                       //Cell Uneditable
        }  
        public Component prepareRenderer(TableCellRenderer r, int data, int columns){   //Changing of Cell Colors
            Component c = super.prepareRenderer(r, data, columns);
            if(data % 2 == 0)
                c.setBackground(Color.WHITE);
            else
                c.setBackground(Color.LIGHT_GRAY);

            if(isCellSelected(data, columns))
                c.setBackground(Color.GREEN);

            return c;
        }

    };

This is the code of filtering my table:

else if(btnSource==btnSearch){
            String getSearch = txtSearch.getText();
            if(rowCount==0){
                JOptionPane.showMessageDialog(null,"Inventory is Empty.","Note!",JOptionPane.ERROR_MESSAGE);
            }
            else{
                sorter.setRowFilter (RowFilter.regexFilter (getSearch));
                sorter.setSortKeys (null);
            }
        }

That's just my problem. I'm not sure if the problem is about filtering or deleting my table because if I remove the code about filtering, the program works fine but when I put it back again, error will be prompted.

Here is the full code:

package VapeShop;

import static VapeShop.Style.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.table.*;

public class Inventory extends JFrame{

    static JPanel inventoryview;
    JLabel bg, lblInventory;
    JTextField txtInventory, txtSearch;
    static JTable itemTable;
    JButton btnSearch, btnAdd, btnBuy, btnDelete, 
            btnUpdate, btnLogout;
    JScrollPane scrollPane;
    final TableRowSorter sorter;
    static Object[][] data = new Object[0][6];
    static String[] columns = new String[6];

    public Inventory(){
        bg = new JLabel(new ImageIcon("C:\\Users\\DPdieciocho\\Documents\\NetBeansProjects\\Database 2\\src\\Images\\bg.png"));
        add(bg);

        inventoryview = new JPanel();
        inventoryview.setLayout(null);
        inventoryview.setOpaque(true);
        inventoryview.setBorder(border);
        inventoryview.setBackground(Color.DARK_GRAY);
        inventoryview.setBounds(128, 85, 750, 400);
        bg.add(inventoryview);

        lblInventory = new JLabel("Inventory");
        lblInventory.setFont(font5);
        lblInventory.setForeground(Color.white);
        lblInventory.setBounds(270, -2, 250, 45);
        inventoryview.add(lblInventory);

        txtInventory = new JTextField();
        txtInventory.setBounds(-1, -1, 750, 50);
        txtInventory.setEditable(false);
        txtInventory.setOpaque(false);
        txtInventory.setBorder(border);
        inventoryview.add(txtInventory);

        columns = new String[] {"No. of Stock", "Product Code", "Item", "Category", "Type", "Class", "Price (PHP)"};
        DefaultTableModel model = new DefaultTableModel (data, columns);

        itemTable = new JTable(model){
            public boolean isCellEditable(int data, int columns){
                return false;                                       //Cell Uneditable
            }  
            public Component prepareRenderer(TableCellRenderer r, int data, int columns){   //Changing of Cell Colors
                Component c = super.prepareRenderer(r, data, columns);
                if(data % 2 == 0)
                    c.setBackground(Color.WHITE);
                else
                    c.setBackground(Color.LIGHT_GRAY);

                if(isCellSelected(data, columns))
                    c.setBackground(Color.GREEN);

                return c;
            }

        };


      sorter = new TableRowSorter (model);
      itemTable.setRowSorter (sorter);


        itemTable.getTableHeader().setReorderingAllowed(false);             //Undraggable Columns
        itemTable.setSelectionMode (ListSelectionModel.SINGLE_SELECTION);   //Selecting a Single Row Only
        scrollPane = new JScrollPane(itemTable);
        scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        scrollPane.setBounds(2, 80, 747, 320);
        inventoryview.add(scrollPane);

        buttons();

        String e_smoke = "Images/smoke.png";
        java.net.URL imgURL = getClass().getClassLoader().getResource(e_smoke);
        ImageIcon smoke = new ImageIcon(imgURL);

        JLabel lblImage = new JLabel(smoke);
        lblImage.setBounds(0, 0, 1280, 500);
        bg.add(lblImage);

        ActionListener listener = new ButtonListener();
        btnBuy.addActionListener(listener);
        btnUpdate.addActionListener(listener);
        btnSearch.addActionListener(listener);
        btnAdd.addActionListener(listener);
        btnDelete.addActionListener(listener);
        btnLogout.addActionListener(listener);

    }

    public void buttons(){
        String search = "Images/search.png";
        java.net.URL imgURL = getClass().getClassLoader().getResource(search);
        ImageIcon searchthis = new ImageIcon(imgURL);

        txtSearch = new JTextField();
        txtSearch.setFont(font6);
        txtSearch.setBorder(border1);
        txtSearch.setHorizontalAlignment(JTextField.CENTER);
        txtSearch.setForeground(Color.BLACK);
        txtSearch.setBounds(485, 55, 175, 20);
        inventoryview.add(txtSearch);

        btnSearch = new JButton(searchthis){
          public JToolTip createToolTip() {
            JToolTip tip = super.createToolTip();
            tip.setForeground(Color.BLACK);
            tip.setBackground(Color.WHITE);
            tip.setFont(font4);
            return tip;
          }
        };
        btnSearch.setBounds(665, 53, 22, 22);
        btnSearch.setFocusable(false);
        btnSearch.setBackground(Color.gray);
        btnSearch.setBorderPainted(false);
        btnSearch.setToolTipText("Search Item");
        btnSearch.setCursor(new Cursor(Cursor.HAND_CURSOR));
        btnSearch.setOpaque(false);
        inventoryview.add(btnSearch);

        String add = "Images/add.png";
        java.net.URL imgURL1 = getClass().getClassLoader().getResource(add);
        ImageIcon addthis = new ImageIcon(imgURL1);

        btnAdd = new JButton(addthis){
          public JToolTip createToolTip() {
            JToolTip tip = super.createToolTip();
            tip.setForeground(Color.BLACK);
            tip.setBackground(Color.WHITE);
            tip.setFont(font4);
            return tip;
          }
        };
        btnAdd.setBounds(693, 53, 22, 22);
        btnAdd.setFocusable(false);
        btnAdd.setBackground(Color.gray);
        btnAdd.setBorderPainted(false);
        btnAdd.setToolTipText("Add new Item");
        btnAdd.setCursor(new Cursor(Cursor.HAND_CURSOR));
        btnAdd.setOpaque(false);
        inventoryview.add(btnAdd);

        String delete = "Images/delete.png";
        java.net.URL imgURL3 = getClass().getClassLoader().getResource(delete);
        ImageIcon deletethis = new ImageIcon(imgURL3);

        btnDelete = new JButton(deletethis){
          public JToolTip createToolTip() {
            JToolTip tip = super.createToolTip();
            tip.setForeground(Color.BLACK);
            tip.setBackground(Color.WHITE);
            tip.setFont(font4);
            return tip;
          }
        };
        btnDelete.setBounds(720, 53, 22, 22);
        btnDelete.setFocusable(false);
        btnDelete.setBackground(Color.gray);
        btnDelete.setBorderPainted(false);
        btnDelete.setToolTipText("Delete Item");
        btnDelete.setCursor(new Cursor(Cursor.HAND_CURSOR));
        btnDelete.setOpaque(false);
        inventoryview.add(btnDelete);

        String buy = "Images/buy.png";
        java.net.URL imgURL2 = getClass().getClassLoader().getResource(buy);
        ImageIcon buythis = new ImageIcon(imgURL2);

        btnBuy = new JButton(buythis){
          public JToolTip createToolTip() {
            JToolTip tip = super.createToolTip();
            tip.setForeground(Color.BLACK);
            tip.setBackground(Color.WHITE);
            tip.setFont(font4);
            return tip;
          }
        };
        btnBuy.setBounds(10, 53, 22, 22);
        btnBuy.setFocusable(false);
        btnBuy.setBackground(Color.gray);
        btnBuy.setBorderPainted(false);
        btnBuy.setToolTipText("Buy new Item");
        btnBuy.setCursor(new Cursor(Cursor.HAND_CURSOR));
        btnBuy.setOpaque(false);
        inventoryview.add(btnBuy);

        String update = "Images/update.png";
        java.net.URL imgURL4 = getClass().getClassLoader().getResource(update);
        ImageIcon updatethis = new ImageIcon(imgURL4);

        btnUpdate = new JButton(updatethis){
          public JToolTip createToolTip() {
            JToolTip tip = super.createToolTip();
            tip.setForeground(Color.BLACK);
            tip.setBackground(Color.WHITE);
            tip.setFont(font4);
            return tip;
          }
        };
        btnUpdate.setBounds(38, 53, 22, 22);
        btnUpdate.setFocusable(false);
        btnUpdate.setBackground(Color.gray);
        btnUpdate.setBorderPainted(false);
        btnUpdate.setToolTipText("Update Quantity");
        btnUpdate.setCursor(new Cursor(Cursor.HAND_CURSOR));
        btnUpdate.setOpaque(false);
        inventoryview.add(btnUpdate);

        String out = "Images/logout.png";
        java.net.URL imgURL5 = getClass().getClassLoader().getResource(out);
        ImageIcon logout = new ImageIcon(imgURL5);

        btnLogout = new JButton(logout){
          public JToolTip createToolTip() {
            JToolTip tip = super.createToolTip();
            tip.setForeground(Color.BLACK);
            tip.setBackground(Color.WHITE);
            tip.setFont(font4);
            return tip;
          }
        };
        btnLogout.setBounds(965, 500, 18, 22);
        btnLogout.setBackground(Color.gray);
        btnLogout.setBorderPainted(false);
        btnLogout.setToolTipText("Log out");
        btnLogout.setCursor(new Cursor(Cursor.HAND_CURSOR));
        btnLogout.setOpaque(false);
        bg.add(btnLogout);
    }

    private class ButtonListener implements ActionListener{
        public void actionPerformed(ActionEvent e){
            Object btnSource = e.getSource();     
            int rowCount = itemTable.getRowCount();
            int rowCheck = itemTable.getSelectedRow();   

            if(btnSource==btnBuy){
                dispose();
                new BuyItem().run();
            }

            else if(btnSource==btnUpdate){
                if(rowCount==0){
                    JOptionPane.showMessageDialog(null,"Inventory is Empty.","Note!",JOptionPane.ERROR_MESSAGE);
                }
                else if(rowCheck<0){
                    JOptionPane.showMessageDialog(null,"Select the item to be updated.","Note!",JOptionPane.ERROR_MESSAGE);
                }
                else{
                    new UpdateItem().run();
                }
            }

            else if(btnSource==btnSearch){
                String getSearch = txtSearch.getText();
                if(rowCount==0){
                    JOptionPane.showMessageDialog(null,"Inventory is Empty.","Note!",JOptionPane.ERROR_MESSAGE);
                }
                else{
                    sorter.setRowFilter (RowFilter.regexFilter (getSearch));
                    sorter.setSortKeys (null);
                }
            }


            else if(btnSource==btnAdd){            
                dispose();
                new AddItem().run();
            }

            else if(btnSource==btnDelete){

                if(rowCount==0){
                    JOptionPane.showMessageDialog(null,"Inventory is Empty.","Note!",JOptionPane.ERROR_MESSAGE);
                }
                else if(rowCheck<0){
                    JOptionPane.showMessageDialog(null,"Select the item to be deleted.","Note!",JOptionPane.ERROR_MESSAGE);
                }
                else{
                    Object[][] temp = new Object[data.length-1][7];
                    for(int i=0; i<rowCheck; i++){
                        temp[i][0] = data[i][0];
                        temp[i][1] = data[i][1];
                        temp[i][2] = data[i][2];
                        temp[i][3] = data[i][3];
                        temp[i][4] = data[i][4];
                        temp[i][5] = data[i][5];
                        temp[i][6] = data[i][6];
                    }
                    for(int i=rowCheck+1; i<data.length; i++){
                        temp[i-1][0] = data[i][0];
                        temp[i-1][1] = data[i][1];
                        temp[i-1][2] = data[i][2];
                        temp[i-1][3] = data[i][3];
                        temp[i-1][4] = data[i][4];
                        temp[i-1][5] = data[i][5];
                        temp[i-1][6] = data[i][6];
                    }
                    data=temp;
                    itemTable.setModel(new DefaultTableModel(data, columns));
                }
            }

            else if(btnSource==btnLogout){
                int selected = JOptionPane.showConfirmDialog(null,"Are you sure you want to Sign out?","Confirm Sign Out",JOptionPane.YES_NO_OPTION);
                if(selected == JOptionPane.YES_OPTION){
                    dispose();
                    new Admin().run();
                }
                else if(selected ==JOptionPane.NO_OPTION){
                }
            }
        }
    }

    public void run(){
        setSize(1000, 562);
        setResizable(false);
        setLocationRelativeTo(null);
        setVisible(true);
        setDefaultCloseOperation (EXIT_ON_CLOSE);
    }

    public static void main(String[] args){
        new Inventory().run();
    }
}

I don't know how to fix this because this is my first time in using JTable.

Answer 1

Your delete method seems way too complicated. All you need to do use is use the removeRow(..) method of the DefaultTableModel.

The code would be something like:

//int index = table.getSelectedIndex(); 
int index = table.getSelectedRow(); 
DefaultTableModel model = (DefaultTableModel)table.getModel();
model.removeRow( table.convertRowIndexToModel( index );

If this doesn't help than post a proper SSCCE based on the tutorial example, not your current code.