在一个简单的摇摆应用程序中，我使用的是TrayIcon
trayMenu = new PopupMenu();
MenuItem closeMenuItem = new MenuItem("Exit");
closeMenuItem.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
closeApp();
}
});
trayMenu.add(closeMenuItem);
trayIcon = new TrayIcon(ImageIO.read(Window.class.getResource("/res/chat.png")), "Msg", trayMenu);
trayIcon.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() == 1) {
setState(JFrame.NORMAL);
setVisible(true);
toFront();
}
}
});
if (SystemTray.isSupported()) {
SystemTray.getSystemTray().add(trayIcon);
}
代码正常，创建托盘，设置图标，添加事件。但是当应用程序使用系统托盘执行时，CPU 使用率高达 50%。如果不使用系统托盘代码，则 CPU 使用率正常。如何解决这个问题？
编辑：这是代码，虽然它不是完整的源代码，但主要的两个 java 文件在这里：
package ui;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.SystemTray;
import java.awt.TrayIcon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTabbedPane;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import msg.HighlightInterface;
/**
*
* @author user
*/
public class Window extends JFrame implements HighlightInterface {
private HashMap<Integer, ChatPanel> tabMap;
private About aboutDialog;
private Window thisWindow;
private TrayIcon trayIcon;
private PopupMenu trayMenu;
@Override
public void messageReceived(String text) {
if (trayIcon != null && !isFocused()) {
trayIcon.displayMessage("Msg", text, TrayIcon.MessageType.INFO);
}
}
private class ServerDaemon extends Thread {
private ServerSocket serverSocket;
@Override
public void run() {
try {
serverSocket = new ServerSocket(7777);
System.out.println("Listening for connections : ");
while (true) {
Socket client;
while ((client = serverSocket.accept()) != null) {
ChatPanel chatPanel = new ChatPanel(client);
chatPanel.addHighlightListener(thisWindow);
tabPane.add(client.getInetAddress().toString(), chatPanel);
System.out.println(client.getRemoteSocketAddress() + " -> connected.");
}
}
} catch (Exception ex) {
ex.printStackTrace();
Dialogs.showErrorDialog("This application is already running or error while initialization.");
System.exit(-1);
}
}
}
private NewDialog newDialog;
/**
* Creates new form Window
*/
public Window() {
thisWindow = this;
initComponents();
setComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
tabPane = new JTabbedPane();
menuBar = new JMenuBar();
fileMenu = new JMenu();
newMenuItem = new JMenuItem();
closeMenuItem = new JMenuItem();
exitMenuItem = new JMenuItem();
helpMenu = new JMenu();
aboutMenuItem = new JMenuItem();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
getContentPane().add(tabPane, BorderLayout.CENTER);
fileMenu.setText("Msg");
newMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));
newMenuItem.setText("New");
newMenuItem.setToolTipText("New chat.");
newMenuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
newMenuItemActionPerformed(evt);
}
});
fileMenu.add(newMenuItem);
closeMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK));
closeMenuItem.setText("Close");
closeMenuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
closeMenuItemActionPerformed(evt);
}
});
fileMenu.add(closeMenuItem);
exitMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F4, InputEvent.ALT_MASK));
exitMenuItem.setText("Exit");
exitMenuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
exitMenuItemActionPerformed(evt);
}
});
fileMenu.add(exitMenuItem);
menuBar.add(fileMenu);
helpMenu.setText("Help");
aboutMenuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F1, 0));
aboutMenuItem.setText("About");
aboutMenuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
aboutMenuItemActionPerformed(evt);
}
});
helpMenu.add(aboutMenuItem);
menuBar.add(helpMenu);
setJMenuBar(menuBar);
pack();
}// </editor-fold>//GEN-END:initComponents
private void newMenuItemActionPerformed(ActionEvent evt) {//GEN-FIRST:event_newMenuItemActionPerformed
showNewDialog();
}//GEN-LAST:event_newMenuItemActionPerformed
private void closeMenuItemActionPerformed(ActionEvent evt) {//GEN-FIRST:event_closeMenuItemActionPerformed
closeWindow();
}//GEN-LAST:event_closeMenuItemActionPerformed
private void exitMenuItemActionPerformed(ActionEvent evt) {//GEN-FIRST:event_exitMenuItemActionPerformed
closeApp();
}//GEN-LAST:event_exitMenuItemActionPerformed
private void aboutMenuItemActionPerformed(ActionEvent evt) {//GEN-FIRST:event_aboutMenuItemActionPerformed
showAbout();
}//GEN-LAST:event_aboutMenuItemActionPerformed
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
final Window window = new Window();
window.new ServerDaemon().start();
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
window.setVisible(true);
}
});
} catch (Exception ex) {
ex.printStackTrace();
Dialogs.showErrorDialog(ex.getMessage());
}
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private JMenuItem aboutMenuItem;
private JMenuItem closeMenuItem;
private JMenuItem exitMenuItem;
private JMenu fileMenu;
private JMenu helpMenu;
private JMenuBar menuBar;
private JMenuItem newMenuItem;
private JTabbedPane tabPane;
// End of variables declaration//GEN-END:variables
private void setComponents() {
try {
trayMenu = new PopupMenu();
MenuItem closeMenuItem = new MenuItem("Exit");
closeMenuItem.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
closeApp();
}
});
trayMenu.add(closeMenuItem);
trayIcon = new TrayIcon(ImageIO.read(Window.class.getResource("/res/chat.png")), "Msg", trayMenu);
trayIcon.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON1 && e.getClickCount() == 1) {
setState(JFrame.NORMAL);
setVisible(true);
toFront();
}
}
});
if (SystemTray.isSupported()) {
SystemTray.getSystemTray().add(trayIcon);
}
newDialog = new NewDialog(this);
aboutDialog = new About(this);
tabMap = new HashMap<Integer, ChatPanel>();
addWindowListener(new WindowAdapter() {
@Override
public void windowIconified(WindowEvent e) {
setVisible(false);
}
});
setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
setTitle("Msg");
setSize(400, 380);
setLocationRelativeTo(null);
} catch (Exception ex) {
ex.printStackTrace();
}
}
private void showNewDialog() {
newDialog.setVisible(true);
}
public void connectToClient(String ip, String name) {
if (name.length() == 0) {
name = System.getProperty("user.name");
}
try {
Socket socket = new Socket(ip, 7777);
ChatPanel chatPanel = new ChatPanel(socket);
tabPane.add(ip, chatPanel);
tabMap.put(tabPane.indexOfComponent(chatPanel), chatPanel);
} catch (Exception ex) {
ex.printStackTrace();
Dialogs.showErrorDialog("Connection not established !, May be this application "
+ "is not running in other system or it may be a network error !");
}
}
private void closeWindow() {
if (tabPane.getTabCount() > 0) {
Component component = tabPane.getSelectedComponent();
if (component instanceof ChatPanel) {
((ChatPanel) component).closeConnection();
tabPane.remove(tabPane.getSelectedIndex());
}
}
}
private void showAbout() {
aboutDialog.setVisible(true);
}
private void closeApp() {
System.exit(0);
}
}
聊天面板.java
package ui;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.Socket;
import java.util.ArrayList;
import javax.swing.GroupLayout;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.LayoutStyle;
import msg.HighlightInterface;
/**
*
* @author user
*/
public class ChatPanel extends JPanel {
private static ArrayList<HighlightInterface> highlightListeners;
static{
highlightListeners=new ArrayList<HighlightInterface>();
}
public static void addHighlightListener(HighlightInterface h){
highlightListeners.add(h);
}
private class EnterListener extends KeyAdapter {
@Override
public void keyReleased(KeyEvent e) {
if (e.getKeyChar() == KeyEvent.VK_ENTER && msg.getText().length() > 0) {
sendMsg(msg.getText());
inbox.setText(inbox.getText() + "me : " + msg.getText());
msg.setText("");
}
}
}
private Socket socket;
private DataInputStream in;
private DataOutputStream out;
private boolean showError = true;
/**
* Creates new form ChatPanel
*/
public ChatPanel(Socket socket) {
this.socket = socket;
initComponents();
setComponents();
}
private void setComponents() {
try {
if (socket != null) {
in = new DataInputStream(socket.getInputStream());
out = new DataOutputStream(socket.getOutputStream());
new Thread() {
@Override
public void run() {
try {
String text = null;
while (true) {
while (in.available() > 0) {
text = in.readUTF();
if (text != null) {
text = socket.getInetAddress().toString() + " : " + text;
inbox.setText(inbox.getText() + text);
informToAll(text);
}
}
}
} catch (Exception ex) {
ex.printStackTrace();
if (showError) {
Dialogs.showErrorDialog(ex.getMessage());
}
}
}
}.start();
}
} catch (Exception ex) {
ex.printStackTrace();
Dialogs.showErrorDialog(ex.getMessage());
}
inbox.setEditable(false);
msg.addKeyListener(new EnterListener());
msg.requestFocus();
}
private void sendMsg(String text) {
try {
if (out != null) {
out.writeUTF(text);
}
} catch (Exception ex) {
ex.printStackTrace();
Dialogs.showErrorDialog("I can't send your message :(");
}
}
public void closeConnection() {
try {
if (socket != null) {
showError = false;
in.close();
out.close();
socket.close();
System.out.println("connection closed!");
}
} catch (Exception ex) {
ex.printStackTrace();
Dialogs.showErrorDialog(ex.getMessage());
}
}
private void informToAll(String text){
if(highlightListeners!=null){
for(HighlightInterface h :highlightListeners)
h.messageReceived(text);
}
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
jScrollPane1 = new JScrollPane();
inbox = new ChatPane();
jScrollPane2 = new JScrollPane();
msg = new ChatPane();
jScrollPane1.setViewportView(inbox);
jScrollPane2.setViewportView(msg);
GroupLayout layout = new GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, GroupLayout.DEFAULT_SIZE, 299, Short.MAX_VALUE)
.addComponent(jScrollPane2))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, GroupLayout.PREFERRED_SIZE, 191, GroupLayout.PREFERRED_SIZE)
.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane2, GroupLayout.DEFAULT_SIZE, 52, Short.MAX_VALUE)
.addContainerGap())
);
}// </editor-fold>//GEN-END:initComponents
// Variables declaration - do not modify//GEN-BEGIN:variables
public ChatPane inbox;
private JScrollPane jScrollPane1;
private JScrollPane jScrollPane2;
public ChatPane msg;
// End of variables declaration//GEN-END:variables
}
这是主要的两个文件。