在java eclipse中找不到资源

我尝试从docs.oracle.com运行示例程序

TrayIconDemo.java

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

package misc;  
/*
 * TrayIconDemo.java
 */

import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import javax.swing.*;

public class TrayIconDemo {
    public static void main(String[] args) {
        /* Use an appropriate Look and Feel */
        try {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
            //UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
        } catch (UnsupportedLookAndFeelException ex) {
            ex.printStackTrace();
        } catch (IllegalAccessException ex) {
            ex.printStackTrace();
        } catch (InstantiationException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        /* Turn off metal's use of bold fonts */
        UIManager.put("swing.boldMetal", Boolean.FALSE);
        //Schedule a job for the event-dispatching thread:
        //adding TrayIcon.
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }

    private static void createAndShowGUI() {
        //Check the SystemTray support
        if (!SystemTray.isSupported()) {
            System.out.println("SystemTray is not supported");
            return;
        }
        final PopupMenu popup = new PopupMenu();
        final TrayIcon trayIcon =
                new TrayIcon(createImage("images/bulb.gif", "tray icon"));
        final SystemTray tray = SystemTray.getSystemTray();

        // Create a popup menu components
        MenuItem aboutItem = new MenuItem("About");
        CheckboxMenuItem cb1 = new CheckboxMenuItem("Set auto size");
        CheckboxMenuItem cb2 = new CheckboxMenuItem("Set tooltip");
        Menu displayMenu = new Menu("Display");
        MenuItem errorItem = new MenuItem("Error");
        MenuItem warningItem = new MenuItem("Warning");
        MenuItem infoItem = new MenuItem("Info");
        MenuItem noneItem = new MenuItem("None");
        MenuItem exitItem = new MenuItem("Exit");

        //Add components to popup menu
        popup.add(aboutItem);
        popup.addSeparator();
        popup.add(cb1);
        popup.add(cb2);
        popup.addSeparator();
        popup.add(displayMenu);
        displayMenu.add(errorItem);
        displayMenu.add(warningItem);
        displayMenu.add(infoItem);
        displayMenu.add(noneItem);
        popup.add(exitItem);

        trayIcon.setPopupMenu(popup);

        try {
            tray.add(trayIcon);
        } catch (AWTException e) {
            System.out.println("TrayIcon could not be added.");
            return;
        }

        trayIcon.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null,
                        "This dialog box is run from System Tray");
            }
        });

        aboutItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null,
                        "This dialog box is run from the About menu item");
            }
        });

        cb1.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                int cb1Id = e.getStateChange();
                if (cb1Id == ItemEvent.SELECTED){
                    trayIcon.setImageAutoSize(true);
                } else {
                    trayIcon.setImageAutoSize(false);
                }
            }
        });

        cb2.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                int cb2Id = e.getStateChange();
                if (cb2Id == ItemEvent.SELECTED){
                    trayIcon.setToolTip("Sun TrayIcon");
                } else {
                    trayIcon.setToolTip(null);
                }
            }
        });

        ActionListener listener = new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                MenuItem item = (MenuItem)e.getSource();
                //TrayIcon.MessageType type = null;
                System.out.println(item.getLabel());
                if ("Error".equals(item.getLabel())) {
                    //type = TrayIcon.MessageType.ERROR;
                    trayIcon.displayMessage("Sun TrayIcon Demo",
                            "This is an error message", TrayIcon.MessageType.ERROR);

                } else if ("Warning".equals(item.getLabel())) {
                    //type = TrayIcon.MessageType.WARNING;
                    trayIcon.displayMessage("Sun TrayIcon Demo",
                            "This is a warning message", TrayIcon.MessageType.WARNING);

                } else if ("Info".equals(item.getLabel())) {
                    //type = TrayIcon.MessageType.INFO;
                    trayIcon.displayMessage("Sun TrayIcon Demo",
                            "This is an info message", TrayIcon.MessageType.INFO);

                } else if ("None".equals(item.getLabel())) {
                    //type = TrayIcon.MessageType.NONE;
                    trayIcon.displayMessage("Sun TrayIcon Demo",
                            "This is an ordinary message", TrayIcon.MessageType.NONE);
                }
            }
        };

        errorItem.addActionListener(listener);
        warningItem.addActionListener(listener);
        infoItem.addActionListener(listener);
        noneItem.addActionListener(listener);

        exitItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                tray.remove(trayIcon);
                System.exit(0);
            }
        });
    }

    //Obtain the image URL
    protected static Image createImage(String path, String description) {
        URL imageURL = TrayIconDemo.class.getResource(path);

        if (imageURL == null) {
            System.err.println("Resource not found: " + path);
            return null;
        } else {
            return (new ImageIcon(imageURL, description)).getImage();
        }
    }
}

这个程序需要bulb.gif文件，这里是bulb.gif的链接。我已经创建了包含bull.gif的图像文件夹。但为什么每次我运行程序时它都会说

    Resource not found: images/bulb.gif
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: creating TrayIcon with null Image
    at java.awt.TrayIcon.<init>(Unknown Source)
    at TrayIconDemo.createAndShowGUI(TrayIconDemo.java:76)
    at TrayIconDemo.access$0(TrayIconDemo.java:68)
    at TrayIconDemo$1.run(TrayIconDemo.java:63)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$200(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

这里是我的项目结构

解决方案是 1.将.java文件放入默认包/不带任何包 2.然后您应该在src文件夹中创建images文件夹，并将bull.gif放在其中，这样您就可以通过键入images/bull.gif来访问它

---

多亏了jitesh

错误行希望图像位于相对于eclipse运行此程序的文件夹的images文件夹中

final TrayIcon trayIcon =
        new TrayIcon(createImage("images/bulb.gif", "tray icon"));

检查eclipse在何处创建类。您可以通过查看项目属性来了解这一点。 在该目录中创建images文件夹并复制图像文件

另一个解决方案（虽然不是很好）是将函数调用更改为：-

    final TrayIcon trayIcon =
        new TrayIcon(createImage("C:\\Users\\azura\\workspace_intermediate_java_third\\azura\\images\\bulb.gif", "tray icon"));

---

请尝试在参数中给出gif文件的绝对路径。@KaustubhMallik/azura/images/bull.gif您是说这个吗？或者这个C:\Users\azura\workspace\u intermediate\u java\u third\azura\images\bull.gif？我是指第二个C:\Users\azura\workspace\u intermediate\u java\u third\azura\images\bull.gif。它应该可以工作。@KaustubhMallik我不能直接把C:\Users\azura\workspace\u intermediate\u java\u third\azura\images\bull.gif放在上面，它说的是无效的转义序列，所以我编辑成这样的C:\\Users\\azura\\workspace\u intermediate\u java\u third\\azura\\images\\bull.gif，但它仍然显示找不到的资源：C:\Users\azura\workspace\u intermediate\u java\u third\azura\images\bull.gif我创建另一个类来检查我的路径，静态路径path=Paths.get（“C:\\Users\\azura\\workspace\u intermediate\u java\u third\\azura\\images\\bull.gif”）；如果（path！=null）{System.out.println（“路径存在”）；System.out.println（path.toString（））；System.out.println（path.getFileName（））}它显示的路径存在C:\Users\azura\workspace\u intermediate\u java\u third\azura\images\bull.gif bull.gif这很奇怪。你能试试我在回答中提到的第一个解决方案吗？在eclipse将类文件放入的目录中创建图像文件夹并将gif文件复制到那里吗？哇，谢谢！，我的错误是我在src文件夹外创建了images文件夹^^

    final TrayIcon trayIcon =
        new TrayIcon(createImage("C:\\Users\\azura\\workspace_intermediate_java_third\\azura\\images\\bulb.gif", "tray icon"));