小编vic*_*VSK的帖子

我在我的 Swing 应用程序中使用 Java 中的 File() 创建了一个文件。我怎样才能让它隐藏在我的目录中。我听说一些属性发生了变化，但在我的初学者看来不清楚。请帮忙。提前致谢。

隐藏完成感谢您的帮助。但是对隐藏文件的读写有问题。请帮忙。隐藏文件是否可以像普通文件一样在写/读中处理？

谁能帮我为什么我的Java swing应用程序出现错误？

ImageIcon(getClass().getResource()

如下图所示加载图像。提前致谢。

显示错误的代码：

jButton9.setIcon(new javax.swing.ImageIcon(getClass().getResource("/images/folder63.png"))); 

错误说明：

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(Unknown Source)
at frame.foundation.initComponents(foundation.java:282)
at frame.foundation.<init>(foundation.java:21)
at frame.foundation$127.run(foundation.java:3453)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$400(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)

PS：我还在项目中添加了“ images”文件夹作为源文件夹

资料夹结构：

myprojectName  
         |  
         |___src  
         |     |  
         |     |___frame //(is my package)  
         |            |  
         | …