JTable selection listener

java, jtable, jtextarea, swing

Solution

In my code I have a table where I set single selection mode; in my case, listener described in How to Write a List Selection Listener (with a for loop from getMinSelectionIndex to getMaxSelectionIndex) is not useful because releasing mouse button I'm sure I have just one row selected.

So I've solved as follows:

....

int iSelectedIndex =-1;

....

JTable jtable = new JTable(tableModel); // tableModel defined elsewhere
jtable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

ListSelectionModel selectionModel = jtable.getSelectionModel();

selectionModel.addListSelectionListener(new ListSelectionListener() {
    public void valueChanged(ListSelectionEvent e) {
        handleSelectionEvent(e);
    }
});

....

protected void handleSelectionEvent(ListSelectionEvent e) {
    if (e.getValueIsAdjusting())
        return;

    // e.getSource() returns an object like this
    // javax.swing.DefaultListSelectionModel 1052752867 ={11}
    // where 11 is the index of selected element when mouse button is released

    String strSource= e.getSource().toString();
    int start = strSource.indexOf("{")+1,
        stop  = strSource.length()-1;
    iSelectedIndex = Integer.parseInt(strSource.substring(start, stop));
}

I think this solution, that does not require a for loop between start and stop to check which element is selectes, is more suitable when table is in single selection mode

Problem

I have a code which displays Table in applets & consists of two columns:- - image icon - description Here's my code: ``` import javax.swing.table.*; public class TableIcon extends JFrame { public TableIcon() { ImageIcon aboutIcon = new ImageIcon("about16.gif"); ImageIcon addIcon = new ImageIcon("add16.gif"); ImageIcon copyIcon = new ImageIcon("copy16.gif"); String[] columnNames = {"Picture", "Description"}; Object[][] data = { {aboutIcon, "About"}, {addIcon, "Add"}, {copyIcon, "Copy"}, }; DefaultTableModel model = new DefaultTableModel(data, columnNames); JTable table = new JTable( model ) { // Returning the Class of each column will allow different // renderers to be used based on Class public Class getColumnClass(int column) { return getValueAt(0, column).getClass(); } }; table.setPreferredScrollableViewportSize(table.getPreferredSize()); JScrollPane scrollPane = new JScrollPane( table ); getContentPane().add( scrollPane ); } public static void main(String[] args) { TableIcon frame = new TableIcon(); frame.setDefaultCloseOperation( EXIT_ON_CLOSE ); frame.pack(); frame.setVisible(true); } } ``` Now what i want to know is how can I implement selection listener or mouse listener event on my table , such that it should select a particular image from my table and display on text area or text field(my table contains path of image file)? Can I add text field on table & table on frame? Please feel free to ask queries if required.

Original source