Java example source code file (bug7055065.java)

This example Java source code file (bug7055065.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, callable, event, exception, gui, integer, jframe, jpanel, jscrollpane, jtable, object, override, point, rectangle, robot, string, suntoolkit, swing, table, tablerowsorter

The bug7055065.java Java example source code

/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * Portions Copyright (c) 2012 IBM Corporation
 */

/* @test 1.1 2012/04/19
 * @bug 7055065
 * @summary NullPointerException when sorting JTable with empty cell
 * @author Jonathan Lu
 * @library ../../regtesthelpers/
 * @build Util
 * @run main bug7055065
 */

import java.awt.Dimension;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
import sun.awt.SunToolkit;
import java.util.concurrent.Callable;

public class bug7055065 {

    private static JTable table;

    public static void main(String[] args) throws Exception {
        SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
        Robot robot = new Robot();

        SwingUtilities.invokeAndWait(new Runnable() {

            public void run() {
                createAndShowUI();
            }
        });

        toolkit.realSync();
        clickCell(robot, 1, 1);
        Util.hitKeys(robot, KeyEvent.VK_BACK_SPACE, KeyEvent.VK_BACK_SPACE,
                KeyEvent.VK_BACK_SPACE);

        toolkit.realSync();
        clickColumnHeader(robot, 1);

        toolkit.realSync();
        clickColumnHeader(robot, 1);
    }

    private static void clickCell(Robot robot, final int row, final int column)
        throws Exception {
        Point point = Util.invokeOnEDT(new Callable<Point>() {
            @Override
            public Point call() throws Exception {
                Rectangle rect = table.getCellRect(row, column, false);
                Point point = new Point(rect.x + rect.width / 2, rect.y
                    + rect.height / 2);
                SwingUtilities.convertPointToScreen(point, table);
                return point;
            }
        });

        robot.mouseMove(point.x, point.y);
        robot.mousePress(InputEvent.BUTTON1_MASK);
        robot.mouseRelease(InputEvent.BUTTON1_MASK);
    }

    private static void clickColumnHeader(Robot robot, final int column)
        throws Exception {
        Point point = Util.invokeOnEDT(new Callable<Point>() {
            @Override
            public Point call() throws Exception {
                Rectangle rect = table.getCellRect(0, column, false);
                int headerHeight = table.getTableHeader().getHeight();
                Point point = new Point(rect.x + rect.width / 2, rect.y
                    - headerHeight / 2);
                SwingUtilities.convertPointToScreen(point, table);
                return point;
            }
        });

        robot.mouseMove(point.x, point.y);
        robot.mousePress(InputEvent.BUTTON1_MASK);
        robot.mouseRelease(InputEvent.BUTTON1_MASK);
    }

    private static void createAndShowUI() {
        JFrame frame = new JFrame("SimpleTableDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel newContentPane = new JPanel();
        newContentPane.setOpaque(true);
        frame.setContentPane(newContentPane);

        final String[] columnNames = { "String", "Number" };
        final Object[][] data = { { "aaaa", new Integer(1) },
            { "bbbb", new Integer(3) }, { "cccc", new Integer(2) },
            { "dddd", new Integer(4) }, { "eeee", new Integer(5) } };
        table = new JTable(data, columnNames);

        table.setPreferredScrollableViewportSize(new Dimension(500, 400));
        table.setFillsViewportHeight(true);

        TableModel dataModel = new AbstractTableModel() {

            public int getColumnCount() {
                return columnNames.length;
            }

            public int getRowCount() {
                return data.length;
            }

            public Object getValueAt(int row, int col) {
                return data[row][col];
            }

            public String getColumnName(int column) {
                return columnNames[column];
            }

            public Class<?> getColumnClass(int c) {
                return getValueAt(0, c).getClass();
            }

            public boolean isCellEditable(int row, int col) {
                return col != 5;
            }

            public void setValueAt(Object aValue, int row, int column) {
                data[row][column] = aValue;
            }
        };
        table.setModel(dataModel);
        TableRowSorter<TableModel> sorter = new TableRowSorter(
                dataModel);
        table.setRowSorter(sorter);

        JScrollPane scrollPane = new JScrollPane(table);
        newContentPane.add(scrollPane);

        frame.pack();
        frame.setLocation(0, 0);
        frame.setVisible(true);
    }
}