Java tutorial
/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of Sun Microsystems nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * SimpleTableSelectionDemo.java requires no other files. */ import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.ListSelectionModel; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; /** * SimpleTableSelectionDemo is just like SimpleTableDemo, except that it detects * selections, printing information about the current selection to standard * output. */ public class Main extends JPanel { private boolean DEBUG = false; private boolean ALLOW_COLUMN_SELECTION = false; private boolean ALLOW_ROW_SELECTION = true; public Main() { 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.setFillsViewportHeight(true); 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() { // Create and set up the window. JFrame frame = new JFrame("SimpleTableSelectionDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Create and set up the content pane. Main newContentPane = new Main(); 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(); } }); } }