Java tutorial
/* From http://java.sun.com/docs/books/tutorial/index.html */ /* * Copyright (c) 2006 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: * * -Redistribution of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * -Redistribution 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, Inc. or the names of contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * This software is provided "AS IS," without a warranty of any kind. ALL * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. * * You acknowledge that this software is not designed, licensed or intended * for use in the design, construction, operation or maintenance of any * nuclear facility. */ /* * 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(); } }); } }