/* * SimpleTableSelectionDemo.java is a 1.4 application that requires no other files. */import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTable;import javax.swing.JComponent;import javax.swing.ListSelectionModel;import javax.swing.event.ListSelectionEvent;import javax.swing.event.ListSelectionListener;import java.awt.Dimension;import java.awt.GridLayout;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;/**  * SimpleTableSelectionDemo is just like SimpleTableDemo,  * except that it detects selections, printing information * about the current selection to standard output. */public class SimpleTableSelectionDemo extends JPanel {    private boolean DEBUG = false;    private boolean ALLOW_COLUMN_SELECTION = false;    private boolean ALLOW_ROW_SELECTION = true;    public SimpleTableSelectionDemo() {        super(new GridLayout(1,0));        final String[] columnNames = {"First Name",                                      "Last Name",                                      "Sport",                                      "# of Years",                                      "Vegetarian"};        final Object[][] data = {            {"Mary", "Campione",             "Snowboarding", new Integer(5), new Boolean(false)},            {"Alison", "Huml",             "Rowing", new Integer(3), new Boolean(true)},            {"Kathy", "Walrath",             "Knitting", new Integer(2), new Boolean(false)},            {"Sharon", "Zakhour",             "Speed reading", new Integer(20), new Boolean(true)},            {"Philip", "Milne",             "Pool", new Integer(10), new Boolean(false)}        };        final JTable table = new JTable(data, columnNames);        table.setPreferredScrollableViewportSize(new Dimension(500, 70));        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);        if (ALLOW_ROW_SELECTION) { // true by default            ListSelectionModel rowSM = table.getSelectionModel();            rowSM.addListSelectionListener(new ListSelectionListener() {                public void valueChanged(ListSelectionEvent e) {                    //Ignore extra messages.                    if (e.getValueIsAdjusting()) return;                    ListSelectionModel lsm = (ListSelectionModel)e.getSource();                    if (lsm.isSelectionEmpty()) {                        System.out.println("No rows are selected.");                    } else {                        int selectedRow = lsm.getMinSelectionIndex();                        System.out.println("Row " + selectedRow                                           + " is now selected.");                    }                }            });        } else {            table.setRowSelectionAllowed(false);        }        if (ALLOW_COLUMN_SELECTION) { // false by default            if (ALLOW_ROW_SELECTION) {                //We allow both row and column selection, which                //implies that we *really* want to allow individual                //cell selection.                table.setCellSelectionEnabled(true);            }            table.setColumnSelectionAllowed(true);            ListSelectionModel colSM =                table.getColumnModel().getSelectionModel();            colSM.addListSelectionListener(new ListSelectionListener() {                public void valueChanged(ListSelectionEvent e) {                    //Ignore extra messages.                    if (e.getValueIsAdjusting()) return;                    ListSelectionModel lsm = (ListSelectionModel)e.getSource();                    if (lsm.isSelectionEmpty()) {                        System.out.println("No columns are selected.");                    } else {                        int selectedCol = lsm.getMinSelectionIndex();                        System.out.println("Column " + selectedCol                                           + " is now selected.");                    }                }            });        }        if (DEBUG) {            table.addMouseListener(new MouseAdapter() {                public void mouseClicked(MouseEvent e) {                    printDebugData(table);                }            });        }        //Create the scroll pane and add the table to it.        JScrollPane scrollPane = new JScrollPane(table);        //Add the scroll pane to this panel.        add(scrollPane);    }    private void printDebugData(JTable table) {        int numRows = table.getRowCount();        int numCols = table.getColumnCount();        javax.swing.table.TableModel model = table.getModel();        System.out.println("Value of data: ");        for (int i=0; i < numRows; i++) {            System.out.print("    row " + i + ":");            for (int j=0; j < numCols; j++) {                System.out.print("  " + model.getValueAt(i, j));            }            System.out.println();        }        System.out.println("--------------------------");    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Make sure we have nice window decorations.        JFrame.setDefaultLookAndFeelDecorated(true);        //Create and set up the window.        JFrame frame = new JFrame("SimpleTableSelectionDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        SimpleTableSelectionDemo newContentPane = new SimpleTableSelectionDemo();        newContentPane.setOpaque(true); //content panes must be opaque        frame.setContentPane(newContentPane);        //Display the window.        frame.pack();        frame.setVisible(true);    }    public static void main(String[] args) {        //Schedule a job for the event-dispatching thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                createAndShowGUI();            }        });    }}