Name: gm110360 Date: 11/16/2001


java version "1.4.0-beta3"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta3-b84)
Java HotSpot(TM) Client VM (build 1.4.0-beta3-b84, mixed mode)


When I create a JTable enclosed in a JScrollPane that contains more than about
2200 rows, painting is corrupted when scrolling around rows past about 2000.

Here's a modified version of SimpleTableDemo.java that displays the bug:

import javax.swing.JTable;
import javax.swing.JScrollPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import java.awt.*;
import java.awt.event.*;

public class SimpleTableDemo extends JFrame {
    public SimpleTableDemo() {
        super("SimpleTableDemo");
        Object[][] data = {
            {"Mary", "Campione",
             "Snowboarding", new Integer(5), new Boolean(false)},
            {"Alison", "Huml",
             "Rowing", new Integer(3), new Boolean(true)},
            {"Kathy", "Walrath",
             "Chasing toddlers", new Integer(2), new Boolean(false)},
            {"Mark", "Andrews",
             "Speed reading", new Integer(20), new Boolean(true)},
            {"Angela", "Lih",
             "Teaching high school", new Integer(4), new Boolean(false)}
        };
        Object [][] data2 = new Object [2200][data[0].length];
        for (int i = 0; i < data2.length; i++) {
          data2[i] = (Object [])data[i%data.length].clone();
          data2[i][3] = new Integer(i+1);
        }
        String[] columnNames = {"First Name",
                                "Last Name",
                                "Sport",
                                "# of Years",
                                "Vegetarian"};
        final JTable table = new JTable(data2, columnNames);
        table.setPreferredScrollableViewportSize(new Dimension(500, 400));
        JScrollPane scrollPane = new JScrollPane(table);
        getContentPane().add(scrollPane, BorderLayout.CENTER);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }

    public static void main(String[] args) {
        SimpleTableDemo frame = new SimpleTableDemo();
        frame.pack();
        frame.setVisible(true);
    }
}


Run this program -- painting corruption appears from row 2145 downwards.

Running under jdk1.3 produces no painting problems, so this is a regression.

Release Regression From : merlin-beta2
The above release value was the last known release where this
bug was knwon to work. Since then there has been a regression.

(Review ID: 135774)
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