DefaultTableModel更改时JTable上的setModel

Question

TableModelListener为侦听TableModel中更改的对象定义接口。

TableModelListener

package net.bounceme.dur.nntp;

import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.util.logging.Logger;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;

public class News {

    private static final Logger LOG = Logger.getLogger(News.class.getName());
    static JFrame frame = new JFrame();
    static JTextPane text = new JTextPane();
    static JSlider slider = new JSlider();
    static MessagesController messagesController = new MessagesController();
    static DefaultTableModel defaultTableModel = new DefaultTableModel();
    static JTable table = new JTable();

    private static void createAndShowGUI() {
        defaultTableModel = messagesController.getDefaultTableModel();
        table.setModel(defaultTableModel);
        table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {

            public void valueChanged(ListSelectionEvent evt) {
                java.awt.EventQueue.invokeLater(new Runnable() {

                    public void run() {
                        int row = table.convertRowIndexToModel(table.getSelectedRow());
                        row = Math.abs(row);  //how can this be negative?
                        LOG.fine("row " + row);
                        MessageBean messageBean = messagesController.getMessageBean(row);
                        text.setText(messageBean.getContent());
                        text.setContentType("text/html");
                    }
                });
            }
        });

        slider.setMinimum(1);
        slider.setMaximum(messagesController.getMax());
        slider.setValue(messagesController.getMax());
        slider.addChangeListener(new javax.swing.event.ChangeListener() {

            public void stateChanged(javax.swing.event.ChangeEvent evt) {
                java.awt.EventQueue.invokeLater(new Runnable() {

                    public void run() {
                        int index = slider.getValue();
                        LOG.fine("slider " + index);
                        messagesController.setIndex(index);
                        defaultTableModel = messagesController.getDefaultTableModel();
                        table.setModel(defaultTableModel);
                        table.getSelectionModel().setSelectionInterval(1, 1);
                    }
                });
            }
        });
        table.getSelectionModel().setSelectionInterval(1, 1);
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(3, 1));
        panel.add(table);
        panel.add(text);
        panel.add(slider);
        frame.add(panel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        frame.pack();
        frame.setVisible(true);
        frame.setSize(screenSize);
    }

    public static void main(String args[]) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {

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

Answer 1

如果基础对象已经更新，为什么必须在JTable上显式调用setmodel()？

你不应该。

JTable更新自身的更好方法是什么？

还不清楚为什么在ListSelectionListener和ChangeListener中使用Invokelater()。这些方法应该已经在事件分派线程上运行。如果没有，则需要同步对任何共享数据的访问。