Question

I created a program to set an imageIcon in jtable fixed column, i created a jtable and getting a database records, then set a first column as fixed column. i set an image icon in fixed column. when i am compiling this program, i am getting only a path of the imageicon not getting an image. I fixed an imageIcon in project package folder.

    This is the code i used

public void Frm_FlxD_Database() {
           try{
                TmpRow=0;
                TmpMainPrj.PRJ_DB_CONNECTION_ASSGN();
                TmpFlxMdl =(DefaultTableModel)FlxD.getModel();
                TmpFlxDRow = 0;

                TmpFlxSt=TmpGPrjVarDec.GContn.createStatement();
                TmpFlxDRs=TmpFlxSt.executeQuery("SELECT * from activitymaster");
                PRJ_FLX_DEFTL_ASSGN(FlxD, "BEGIN");
                TmpFlxDRs.first();
                do {
                    FlxD.setValueAt(TmpFlxDRs.getString("ACTVTYDESC"), TmpRow,1);
                    FlxD.setValueAt(TmpFlxDRs.getString("ACTVTYCODE"), TmpRow,2);
                    FlxD.setValueAt(TmpFlxDRs.getString("DISPSTATUS"), TmpRow,3);
                    FlxD.setValueAt(TmpFlxDRs.getString("ACTVTYID"), TmpRow,4);
                    TmpFlxMdl.addRow(new Object[]{""});
                    TmpRow = TmpRow + 1;
                }while(TmpFlxDRs.next());

                FRM_FLXD_PTR_DATA_ASSGN(TmpFlxDRow);
           }
           catch(Exception e){
                System.out.println(e);
           }
    }
private void FRM_FLXD_PTR_DATA_ASSGN(int PFlxRow) {
           TmpFlxDRow = PRJ_FLX_PTR_ASSGN(FlxD, PFlxRow, TmpFlxDRow);
   }

    private int PRJ_FLX_PTR_ASSGN(JTable PFlx, int PCurRow, int PPrvRow) {
            ImageIcon TmpIcon;

            System.out.println(PCurRow);
            System.out.println(PPrvRow);

            if (PCurRow != PPrvRow){
                TmpIcon = new ImageIcon(getClass().getResource("Blank.gif"));
                PFlx.setValueAt(TmpIcon,PPrvRow,0);
                System.out.println(TmpIcon);
            }
            TmpIcon = new ImageIcon(getClass().getResource("Pointer.gif"));
            PFlx.setValueAt(TmpIcon,PCurRow,0);
            System.out.println(TmpIcon);               
            return(PCurRow);
    }

Answer 1

JTable knows Icon/ImageIcon, simple example

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.*;
import javax.swing.table.*;

public class TableIcon extends JFrame implements Runnable {

    private static final long serialVersionUID = 1L;
    private JTable table;
    private JLabel myLabel = new JLabel("waiting");
    private int pHeight = 40;
    private boolean runProcess = true;
    private int count = 0;

    public TableIcon() {
        ImageIcon errorIcon = (ImageIcon) UIManager.getIcon("OptionPane.errorIcon");
        ImageIcon infoIcon = (ImageIcon) UIManager.getIcon("OptionPane.informationIcon");
        ImageIcon warnIcon = (ImageIcon) UIManager.getIcon("OptionPane.warningIcon");
        String[] columnNames = {"Picture", "Description"};
        Object[][] data = {{errorIcon, "About"}, {infoIcon, "Add"}, {warnIcon, "Copy"},};
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        table = new JTable(model) {

            private static final long serialVersionUID = 1L;
            //  Returning the Class of each column will allow different
            //  renderers to be used based on Class

            @Override
            public Class getColumnClass(int column) {
                return getValueAt(0, column).getClass();
            }
        };
        table.setRowHeight(pHeight);
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane, BorderLayout.CENTER);
        myLabel.setPreferredSize(new Dimension(200, pHeight));
        myLabel.setHorizontalAlignment(SwingConstants.CENTER);
        add(myLabel, BorderLayout.SOUTH);
        EventQueue.invokeLater(new Runnable() {

            public void run() {
            }
        });
        new Thread(this).start();
    }

    public void run() {
        while (runProcess) {
            try {
                Thread.sleep(750);
            } catch (Exception e) {
                e.printStackTrace();
            }
            SwingUtilities.invokeLater(new Runnable() {

                @Override
                public void run() {
                    ImageIcon myIcon = (ImageIcon) table.getModel().getValueAt(count, 0);
                    String lbl = "JTable Row at :  " + count;
                    myLabel.setIcon(myIcon);
                    myLabel.setText(lbl);
                    count++;
                    if (count > 2) {
                        count = 0;
                    }
                }
            });
        }
    }

    public static void main(String[] args) {
        TableIcon frame = new TableIcon();
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.setLocation(150, 150);
        frame.pack();
        frame.setVisible(true);
    }
}