我有一个java表，我动态更新行。这是我创建的一个例子。它逐行模仿我的实际程序，用于创建表格和添加滚动窗格。我的实际节目是巨大的，对不起，我无法分享。
import java.awt.*;
import java.awt.event.*;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
class SimpleTableExample extends JFrame
{
private JPanel topPanel;
private JTable table;
private JScrollPane scrollPane;
private DefaultTableModel model = null;
private JPanel pMainMenu = null;
public SimpleTableExample()
{
pMainMenu = new JPanel();
BorderLayout thisLayout = new BorderLayout();
pMainMenu.setLayout(thisLayout);
{
JPanel pButtons = new JPanel();
pMainMenu.add(pButtons, BorderLayout.NORTH);
GridBagLayout pButtonsLayout = new GridBagLayout();
pButtonsLayout.columnWidths = new int[]{7, 7, 7};
pButtonsLayout.rowHeights = new int[]{25};
pButtonsLayout.columnWeights = new double[]{0.1, 0.1, 0.1};
pButtonsLayout.rowWeights = new double[]{0.1};
{
JButton btNew = new JButton();
pButtons.add(btNew, new GridBagConstraints(2, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER, GridBagConstraints.NONE,
new Insets(0, 5, 0, 0), 0, 0));
btNew.setText("<html><center>Run</center><center>Configuration</center></html>");
btNew.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
btRunConfiguration(evt);
}
});
}
}
topPanel = new JPanel();
topPanel.setLayout( new BorderLayout() );
{
model = new DefaultTableModel();
table = new JTable(model);
scrollPane = new JScrollPane( table );
topPanel.add( scrollPane, BorderLayout.CENTER );
model.addColumn(" ");
model.addColumn(" ");
model.addColumn(" ");
}
getContentPane().add(pMainMenu);
getContentPane().repaint();
pack();
setSize(520, 130);
setLocationRelativeTo(null);
setVisible(true);
}
private void btRunConfiguration(ActionEvent evt) {
getContentPane().removeAll();
getContentPane().add( topPanel );
getContentPane().repaint();
setTitle("Simple Table Application");
setSize(300, 100);
setBackground(Color.gray);
pack();
setVisible(true);
String columnNames[] = { "Column 1", "Column 2", "Column 3" };
for(int i=0;i<300;i++)
{
try {
Thread.sleep(1000);
} catch(InterruptedException ie) {
// ignore!
ie.printStackTrace();
}
model.addRow(new Object[]{i,i,i});
/**************This message dialog box show row updated to refresh table for viewing***********/
//Must schedule the close before the dialog becomes visible
JFrame closeDialog = new JFrame();
final JDialog dialog = new JDialog(closeDialog, "Updated", true);
ScheduledExecutorService s = Executors.newSingleThreadScheduledExecutor();
s.schedule(new Runnable() {
public void run() {
dialog.setVisible(false); //should be invoked on the EDT
dialog.dispose();
}
}, 500, TimeUnit.MILLISECONDS);
dialog.setVisible(true); // if modal, application will pause here
//System.out.println("Dialog closed");
/**************This message dialog box show row updated to refresh table for viewing***********/
}
}
public static void main( String args[] )
{
// Create an instance of the test application
SimpleTableExample mainFrame = new SimpleTableExample();
mainFrame.setVisible( true );
}
}
滚动窗格无效。你能帮忙吗？感谢
***************************新守则****************** *********************
import java.awt.*;
import java.awt.event.*;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
class SimpleTableExample extends JFrame
{
private JPanel topPanel;
private JTable table;
private JScrollPane scrollPane;
private DefaultTableModel model = null;
private JPanel pMainMenu = null;
public SimpleTableExample()
{
pMainMenu = new JPanel();
BorderLayout thisLayout = new BorderLayout();
pMainMenu.setLayout(thisLayout);
{
JPanel pButtons = new JPanel();
pMainMenu.add(pButtons, BorderLayout.NORTH);
GridBagLayout pButtonsLayout = new GridBagLayout();
pButtonsLayout.columnWidths = new int[]{7, 7, 7};
pButtonsLayout.rowHeights = new int[]{25};
pButtonsLayout.columnWeights = new double[]{0.1, 0.1, 0.1};
pButtonsLayout.rowWeights = new double[]{0.1};
{
JButton btNew = new JButton();
pButtons.add(btNew, new GridBagConstraints(2, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER, GridBagConstraints.NONE,
new Insets(0, 5, 0, 0), 0, 0));
btNew.setText("<html><center>Run</center><center>Configuration</center></html>");
btNew.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
btRunConfiguration(evt);
}
});
}
}
topPanel = new JPanel();
topPanel.setLayout( new BorderLayout() );
{
model = new DefaultTableModel();
table = new JTable(model);
scrollPane = new JScrollPane( table );
topPanel.add( scrollPane, BorderLayout.CENTER );
model.addColumn(" ");
model.addColumn(" ");
model.addColumn(" ");
}
getContentPane().add(pMainMenu);
getContentPane().repaint();
pack();
setSize(520, 130);
setLocationRelativeTo(null);
setVisible(true);
}
private void btRunConfiguration(ActionEvent evt) {
getContentPane().removeAll();
getContentPane().add( topPanel );
getContentPane().repaint();
setTitle("Simple Table Application");
setSize(300, 100);
setBackground(Color.gray);
pack();
setVisible(true);
String columnNames[] = { "Column 1", "Column 2", "Column 3" };
for(int i=0;i<300;i++) {
try {
Thread.sleep(1000);
} catch(InterruptedException ie) {
// ignore!
ie.printStackTrace();
}
new MyWorker(model).execute();
/**************This message dialog box show row updated to refresh table for viewing***********/
//Must schedule the close before the dialog becomes visible
JFrame closeDialog = new JFrame();
final JDialog dialog = new JDialog(closeDialog, "Updated", true);
ActionListener timerAction = new ActionListener()
{
@Override
public void actionPerformed(ActionEvent ae)
{
dialog.setVisible(false); //should be invoked on the EDT
dialog.dispose();
}
};
Timer timer = new Timer(500, timerAction);
timer.start();
dialog.setVisible(true); // if modal, application will pause here
//System.out.println("Dialog closed");
/**************This message dialog box show row updated to refresh table for viewing***********/
}
}
class MyWorker extends SwingWorker<Void, Void> {
DefaultTableModel model;
MyWorker(DefaultTableModel model){
this.model=model;
}
@Override
public Void doInBackground() {
model.addRow(new Object[]{1,1,1});
return null;
}
@Override
protected void done() {
}
}
public static void main( String args[] )
{
// Create an instance of the test application
SimpleTableExample mainFrame = new SimpleTableExample();
mainFrame.setVisible( true );
}}
*************************************新代码2计时器问题***** **************
import java.awt.*;
import java.awt.event.*;
import java.io.IOException;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
class SimpleTableExample extends JFrame
{
private JPanel topPanel;
private JTable table;
private JScrollPane scrollPane;
private DefaultTableModel model = null;
private JPanel pMainMenu = null;
private Timer timer = null;
public SimpleTableExample()
{
pMainMenu = new JPanel();
BorderLayout thisLayout = new BorderLayout();
pMainMenu.setLayout(thisLayout);
{
JPanel pButtons = new JPanel();
pMainMenu.add(pButtons, BorderLayout.NORTH);
GridBagLayout pButtonsLayout = new GridBagLayout();
pButtonsLayout.columnWidths = new int[]{7, 7, 7};
pButtonsLayout.rowHeights = new int[]{25};
pButtonsLayout.columnWeights = new double[]{0.1, 0.1, 0.1};
pButtonsLayout.rowWeights = new double[]{0.1};
{
JButton btNew = new JButton();
pButtons.add(btNew, new GridBagConstraints(2, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER, GridBagConstraints.NONE,
new Insets(0, 5, 0, 0), 0, 0));
btNew.setText("<html><center>Run</center><center>Configuration</center></html>");
btNew.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
btRunConfiguration(evt);
}
});
}
}
topPanel = new JPanel();
topPanel.setLayout( new BorderLayout() );
{
model = new DefaultTableModel();
table = new JTable(model);
scrollPane = new JScrollPane( table );
topPanel.add( scrollPane, BorderLayout.CENTER );
model.addColumn(" ");
model.addColumn(" ");
model.addColumn(" ");
}
getContentPane().add(pMainMenu);
getContentPane().repaint();
pack();
setSize(520, 130);
setLocationRelativeTo(null);
setVisible(true);
String columnNames[] = { "Column 1", "Column 2", "Column 3" };
//new MyWorker().execute();
}
private void btRunConfiguration(ActionEvent evt) {
getContentPane().removeAll();
getContentPane().add( topPanel );
getContentPane().repaint();
setTitle("Simple Table Application");
setSize(300, 100);
setBackground(Color.gray);
pack();
showOnScreen(1,this);
setVisible(true);
new MyWorker().execute();
}
class MyWorker extends SwingWorker<Void, Void> {
@Override
public Void doInBackground() {
ActionListener taskPerformer = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < 300; i++) {
try {
Runtime rt = Runtime.getRuntime();
String url = "http://stackoverflow.com";
rt.exec("rundll32 url.dll,FileProtocolHandler " + url);
Thread.sleep(1000);
} catch (InterruptedException ie) {
// ignore!
ie.printStackTrace();
} catch (IOException le) {
le.printStackTrace();
}
model.addRow(new Object[]{i, i, i});
/**************This message dialog box show row updated to refresh table for viewing***********/
//Must schedule the close before the dialog becomes visible
JFrame closeDialog = new JFrame();
final JDialog dialog = new JDialog(closeDialog, "Updated", true);
ScheduledExecutorService s = Executors.newSingleThreadScheduledExecutor();
s.schedule(new Runnable() {
public void run() {
dialog.setVisible(false); //should be invoked on the EDT
dialog.dispose();
}
}, 500, TimeUnit.MILLISECONDS);
dialog.setVisible(true); // if modal, application will pause here
//System.out.println("Dialog closed");
/**************This message dialog box show row updated to refresh table for viewing***********/
}
}
};
timer = new Timer(20, taskPerformer);
timer.start();
return null;
}
@Override
protected void done() {
}
}
public static void main( String args[] )
{
// Create an instance of the test application
SimpleTableExample mainFrame = new SimpleTableExample();
mainFrame.setVisible( true );
}
public void showOnScreen( int screen, JFrame frame ) {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gd = ge.getScreenDevices();
if( screen > 0 && screen < 2 ) {
int x = frame.getWidth()/2;
int y = frame.getHeight()/2;
frame.setLocation((gd[screen].getDefaultConfiguration().getBounds().width * 3/2) - x, (gd[screen].getDefaultConfiguration().getBounds().height *1/2) - y);
// JFrame dummy = new JFrame(gd[screen].getDefaultConfiguration());
// setLocationRelativeTo(dummy);
// dummy.dispose();
} else if( gd.length > 0 ) {
frame.setLocationRelativeTo(null);
} else {
throw new RuntimeException( "No Screens Found" );
}
}
}
答案 0 :(得分：1)
Always use swing threads when interacting with swing components.Try the below solution it works
import java.awt.*;
import java.awt.event.*;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
class SimpleTableExample extends JFrame
{
private JPanel topPanel;
private JTable table;
private JScrollPane scrollPane;
private DefaultTableModel model = null;
private JPanel pMainMenu = null;
public SimpleTableExample()
{
pMainMenu = new JPanel();
BorderLayout thisLayout = new BorderLayout();
pMainMenu.setLayout(thisLayout);
{
JPanel pButtons = new JPanel();
pMainMenu.add(pButtons, BorderLayout.NORTH);
GridBagLayout pButtonsLayout = new GridBagLayout();
pButtonsLayout.columnWidths = new int[]{7, 7, 7};
pButtonsLayout.rowHeights = new int[]{25};
pButtonsLayout.columnWeights = new double[]{0.1, 0.1, 0.1};
pButtonsLayout.rowWeights = new double[]{0.1};
{
JButton btNew = new JButton();
pButtons.add(btNew, new GridBagConstraints(2, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER, GridBagConstraints.NONE,
new Insets(0, 5, 0, 0), 0, 0));
btNew.setText("<html><center>Run</center><center>Configuration</center></html>");
btNew.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
btRunConfiguration(evt);
}
});
}
}
topPanel = new JPanel();
topPanel.setLayout( new BorderLayout() );
{
model = new DefaultTableModel();
table = new JTable(model);
scrollPane = new JScrollPane( table );
topPanel.add( scrollPane, BorderLayout.CENTER );
model.addColumn(" ");
model.addColumn(" ");
model.addColumn(" ");
}
getContentPane().add(pMainMenu);
getContentPane().repaint();
pack();
setSize(520, 130);
setLocationRelativeTo(null);
setVisible(true);
}
private void btRunConfiguration(ActionEvent evt) {
getContentPane().removeAll();
getContentPane().add( topPanel );
getContentPane().repaint();
setTitle("Simple Table Application");
setSize(300, 100);
setBackground(Color.gray);
pack();
setVisible(true);
String columnNames[] = { "Column 1", "Column 2", "Column 3" };
new MyWorker(model).execute();
}
class MyWorker extends SwingWorker<Void, Void> {
DefaultTableModel model;
MyWorker(DefaultTableModel model){
this.model=model;
}
@Override
public Void doInBackground() {
for(int i=0;i<300;i++)
{
try {
Thread.sleep(1000);
} catch(InterruptedException ie) {
// ignore!
ie.printStackTrace();
}
model.addRow(new Object[]{i,i,i});
/**************This message dialog box show row updated to refresh table for viewing***********/
//Must schedule the close before the dialog becomes visible
JFrame closeDialog = new JFrame();
final JDialog dialog = new JDialog(closeDialog, "Updated", true);
ActionListener timerAction = new ActionListener()
{
@Override
public void actionPerformed(ActionEvent ae)
{
dialog.setVisible(false); //should be invoked on the EDT
dialog.dispose();
}
};
Timer timer = new Timer(500, timerAction);
timer.start();
dialog.setVisible(true); // if modal, application will pause here
//System.out.println("Dialog closed");
/**************This message dialog box show row updated to refresh table for viewing***********/
}
return null;
}
@Override
protected void done() {
}
}
public static void main( String args[] )
{
// Create an instance of the test application
SimpleTableExample mainFrame = new SimpleTableExample();
mainFrame.setVisible( true );
}}
UPDATE According to your problem that you updated with your design.You just have to make sure the loop needs to run through a Swing Thread.For example if you have this method of update table
private void updateTable(){
for(int i=0;i<300;i++)
{
try {
Thread.sleep(1000);
} catch(InterruptedException ie) {
// ignore!
ie.printStackTrace();
}
model.addRow(new Object[]{i,i,i});
/**************This message dialog box show row updated to refresh table for viewing***********/
//Must schedule the close before the dialog becomes visible
JFrame closeDialog = new JFrame();
final JDialog dialog = new JDialog(closeDialog, "Updated", true);
ScheduledExecutorService s = Executors.newSingleThreadScheduledExecutor();
s.schedule(new Runnable() {
public void run() {
dialog.setVisible(false); //should be invoked on the EDT
dialog.dispose();
}
}, 500, TimeUnit.MILLISECONDS);
dialog.setVisible(true); // if modal, application will pause here
//System.out.println("Dialog closed");
/**************This message dialog box show row updated to refresh table for viewing***********/
}}
Make sure you call it from SwingWorker
private void btRunConfiguration(ActionEvent evt) {
getContentPane().removeAll();
getContentPane().add( topPanel );
getContentPane().repaint();
setTitle("Simple Table Application");
setSize(300, 100);
setBackground(Color.gray);
pack();
setVisible(true);
new MyWorker().execute();
}
class MyWorker extends SwingWorker<Void, Void> {
@Override
public Void doInBackground() {
updateTable();
return null;
}
@Override
protected void done() {
} }
According to update 2
private void btRunConfiguration(ActionEvent evt) {
getContentPane().removeAll();
getContentPane().add( topPanel );
getContentPane().repaint();
setTitle("Simple Table Application");
setSize(300, 100);
setBackground(Color.gray);
pack();
showOnScreen(1,this);
setVisible(true);
final AtomicBoolean flag = new AtomicBoolean(false);
ActionListener taskPerformer = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(!flag.get()){
flag.set(true);
new MyWorker(flag).execute();
//flag.set(false);
}
}
};
Timer timer = new Timer(20, taskPerformer);
timer.setRepeats(true);
timer.start();
}
class MyWorker extends SwingWorker<Void, Void> {
AtomicBoolean flag;
MyWorker(AtomicBoolean flag){
this.flag=flag;
}
@Override
public Void doInBackground() {
for (int i = 0; i < 300; i++) {
try {
Runtime rt = Runtime.getRuntime();
String url = "http://stackoverflow.com";
rt.exec("rundll32 url.dll,FileProtocolHandler " + url);
Thread.sleep(1000);
} catch (InterruptedException ie) {
// ignore!
ie.printStackTrace();
} catch (Exception le) {
le.printStackTrace();
}
model.addRow(new Object[]{i, i, i});
/**************This message dialog box show row updated to refresh table for viewing***********/
//Must schedule the close before the dialog becomes visible
JFrame closeDialog = new JFrame();
final JDialog dialog = new JDialog(closeDialog, "Updated", true);
ScheduledExecutorService s = Executors.newSingleThreadScheduledExecutor();
s.schedule(new Runnable() {
public void run() {
dialog.setVisible(false); //should be invoked on the EDT
dialog.dispose();
}
}, 500, TimeUnit.MILLISECONDS);
dialog.setVisible(true); // if modal, application will pause here
//System.out.println("Dialog closed");
/**************This message dialog box show row updated to refresh table for viewing***********/
}
return null;
}
@Override
protected void done() {
flag.set(false);
}
}