Eclipse-jar创建失败“Class files on classpath not found or not accessible for…”?

内容来源于 Stack Overflow,并遵循CC BY-SA 3.0许可协议进行翻译与使用

  • 回答 (2)
  • 关注 (0)
  • 查看 (365)

我在Eclipse中有一个项目,它上面有一个红十字会,不会导出到一个可运行的JAR中。我不记得自从我在笔记本电脑上重新安装Windows之后,我是否看过它,但我知道我没有修改任何代码。在任何类中都没有错误,但是我得到的错误指向以下类,它处理MacOSX上的菜单项:

import java.lang.reflect.*;

public class osxhandler implements InvocationHandler {

      protected Object targetObject;
        protected Method targetMethod;
        protected String proxySignature;

        static Object macOSXApplication;

        // Pass this method an Object and Method equipped to perform application shutdown logic
        // The method passed should return a boolean stating whether or not the quit should occur
        public static void setQuitHandler(Object target, Method quitHandler) {
            setHandler(new HOsx("handleQuit", target, quitHandler));
        }


    public static void setAboutHandler(Object target, Method aboutHandler) {
        boolean enableAboutMenu = (target != null && aboutHandler != null);
        if (enableAboutMenu) {
            setHandler(new HOsx("handleAbout", target, aboutHandler));
        }
        // If we're setting a handler, enable the About menu item by calling
        // com.apple.eawt.Application reflectively
        try {
            Method enableAboutMethod = macOSXApplication.getClass().getDeclaredMethod("setEnabledAboutMenu", new Class[] { boolean.class });
            enableAboutMethod.invoke(macOSXApplication, new Object[] { Boolean.valueOf(enableAboutMenu) });
        } catch (Exception ex) {
            System.err.println("MacOSHandler could not access the About Menu");
            ex.printStackTrace();
        }
    }

       public static void setPreferencesHandler(Object target, Method prefsHandler) {
            boolean enablePrefsMenu = (target != null && prefsHandler != null);
            if (enablePrefsMenu) {
                setHandler(new HOsx("handlePreferences", target, prefsHandler));
            }
            // If we're setting a handler, enable the Preferences menu item by calling
            // com.apple.eawt.Application reflectively
            try {
                Method enablePrefsMethod = macOSXApplication.getClass().getDeclaredMethod("setEnabledPreferencesMenu", new Class[] { boolean.class });
                enablePrefsMethod.invoke(macOSXApplication, new Object[] { Boolean.valueOf(enablePrefsMenu) });
            } catch (Exception ex) {
                System.err.println("MacOSHandler could not access the About Menu");
                ex.printStackTrace();
            }
        }

        // Pass this method an Object and a Method equipped to handle document events from the Finder
        // Documents are registered with the Finder via the CFBundleDocumentTypes dictionary in the 
        // application bundle's Info.plist
        public static void setFileHandler(Object target, Method fileHandler) {
            setHandler(new HOsx("handleOpenFile", target, fileHandler) {
                // Override MacOSHandler.callTarget to send information on the
                // file to be opened
                public boolean callTarget(Object appleEvent) {
                    if (appleEvent != null) {
                        try {
                            Method getFilenameMethod = appleEvent.getClass().getDeclaredMethod("getFilename", (Class[])null);
                            String filename = (String) getFilenameMethod.invoke(appleEvent, (Object[])null);
                            this.targetMethod.invoke(this.targetObject, new Object[] { filename });
                        } catch (Exception ex) {

                        }
                    }
                    return true;
                }
            });
        }

        // setHandler creates a Proxy object from the passed MacOSHandler and adds it as an ApplicationListener
        @SuppressWarnings({ "unchecked", "rawtypes" })
        public static void setHandler(HOsx adapter) {
            try {
                Class applicationClass = Class.forName("com.apple.eawt.Application");
                if (macOSXApplication == null) {
                    macOSXApplication = applicationClass.getConstructor((Class[])null).newInstance((Object[])null);
                }
                Class applicationListenerClass = Class.forName("com.apple.eawt.ApplicationListener");
                Method addListenerMethod = applicationClass.getDeclaredMethod("addApplicationListener", new Class[] { applicationListenerClass });
                // Create a proxy object around this handler that can be reflectively added as an Apple ApplicationListener
                Object MacOSHandlerProxy = Proxy.newProxyInstance(HOsx.class.getClassLoader(), new Class[] { applicationListenerClass }, adapter);
                addListenerMethod.invoke(macOSXApplication, new Object[] { MacOSHandlerProxy });
            } catch (ClassNotFoundException cnfe) {
                System.err.println("This version of Mac OS X does not support the Apple EAWT.  ApplicationEvent handling has been disabled (" + cnfe + ")");
            } catch (Exception ex) {  // Likely a NoSuchMethodException or an IllegalAccessException loading/invoking eawt.Application methods
                System.err.println("Mac OS X Adapter could not talk to EAWT:");
                ex.printStackTrace();
            }
        }

        // Each MacOSHandler has the name of the EAWT method it intends to listen for (handleAbout, for example),
        // the Object that will ultimately perform the task, and the Method to be called on that Object
        protected HOsx(String proxySignature, Object target, Method handler) {
            this.proxySignature = proxySignature;
            this.targetObject = target;
            this.targetMethod = handler;
        }

        // Override this method to perform any operations on the event 
        // that comes with the various callbacks
        // See setFileHandler above for an example
        public boolean callTarget(Object appleEvent) throws InvocationTargetException, IllegalAccessException {
            Object result = targetMethod.invoke(targetObject, (Object[])null);
            if (result == null) {
                return true;
            }
            return Boolean.valueOf(result.toString()).booleanValue();
        }

        // InvocationHandler implementation
        // This is the entry point for our proxy object; it is called every time an ApplicationListener method is invoked
        public Object invoke (Object proxy, Method method, Object[] args) throws Throwable {
            if (isCorrectMethod(method, args)) {
                boolean handled = callTarget(args[0]);
                setApplicationEventHandled(args[0], handled);
            }
            // All of the ApplicationListener methods are void; return null regardless of what happens
            return null;
        }

        // Compare the method that was called to the intended method when the MacOSHandler instance was created
        // (e.g. handleAbout, handleQuit, handleOpenFile, etc.)
        protected boolean isCorrectMethod(Method method, Object[] args) {
            return (targetMethod != null && proxySignature.equals(method.getName()) && args.length == 1);
        }

        // It is important to mark the ApplicationEvent as handled and cancel the default behavior
        // This method checks for a boolean result from the proxy method and sets the event accordingly
        protected void setApplicationEventHandled(Object event, boolean handled) {
            if (event != null) {
                try {
                    Method setHandledMethod = event.getClass().getDeclaredMethod("setHandled", new Class[] { boolean.class });
                    // If the target method returns a boolean, use that as a hint
                    setHandledMethod.invoke(event, new Object[] { Boolean.valueOf(handled) });
                } catch (Exception ex) {
                    System.err.println("MacOSHandler was unable to handle an ApplicationEvent: " + event);
                    ex.printStackTrace();
                }
            }
        }    
}

对于为什么我不能导出/编译有什么想法吗?我以前从没遇到过这个问题

提问于
用户回答回答于

只需在项目上进行clean and/or rebuild即可。

你可以在ProjectEclipse菜单。

热门问答

腾讯云 COS 怎么才能外链调用 m3u8 到别的网站播放?

滑稽园扛把子

Swoole · PHP开发工程师 (已认证)

As a PHP Developer
推荐
设置公有读私有写:当访问对象时,COS 读取到对象的权限为公有读,此时无论存储桶为何种权限,对象都可以被直接下载 设置步骤 登录 对象存储控制台,选择左侧菜单栏【存储桶列表】,进入存储桶列表页面。单击需要修改对象权限的对应存储桶,进入存储桶。 📷 找到需要设置权限的对象(如 e...... 展开详请

Ubuntu搭建的WordPress如何修改php.ini?

滑稽园扛把子

Swoole · PHP开发工程师 (已认证)

As a PHP Developer
推荐
php新手很多不知道怎么查配置文件在哪,这里提供一个很简单的方法 使用 php -i 命令可以打印php的详细信息,可以把这堆东西输出一下 php -i > outputphp.txt,结合 grep 查找命令 php -i| grep php.ini 打印结果如下 Config...... 展开详请

归档存储采用的存储介质是什么, 安全可靠吗?

滑稽园扛把子

Swoole · PHP开发工程师 (已认证)

As a PHP Developer
推荐
归档存储主要是针对海量、重要且访问频率极低的非结构化数据进行长期的归档保存和备份管理。 在数据安全层面,归档存储提供数据锁定机制,防止数据被修改和删除,保障数据安全。 技术架构: image.png 与对象存储的差异 归档存储 CAS 是一项离线存储服务,不同于在线的对象存储 ...... 展开详请

在按官网手册排错后依然提示1004错误?

看你的代码好像是短信相关的代码,1004错误代表请求包解析失败,通常情况下是由于没有遵守 API 接口说明规范导致的。 建议您通过以下方式定位解决: 首先,要确认发送的请求是否是标准的 json 格式; 第二,检查是否有将单引号当做双引号使用(json 标准应该是双引号); 第...... 展开详请

redis数据库应该怎样连接???

滑稽园扛把子

Swoole · PHP开发工程师 (已认证)

As a PHP Developer
推荐
实例初始化完成后,连接腾讯云Redis时,需要输入设置的密码。主从版和集群版的连接示例如下 主从版连接示例 主从版支持2种格式 • 格式1,“实例id:密码”的格式类型,例如您的实例id是crs-bkuza6i3,设置的密码是abcd1234,则连接命令如下 redis-cli ...... 展开详请

如何使用holer实现从外网访问本地WEB应用?

Dingda

Dingda · 站长 (已认证)

多一些不为什么的坚持
推荐
解压holer软件 获取holer access key信息: 在holer官网上申请专属的holer access key或者使用开源社区上公开的access key信息。 启动holer服务: Windows系统平台: 打开CMD窗口进入可执行程序所在的目录下,执行命令:...... 展开详请

所属标签

扫码关注云+社区