Oracle EBS Java Applet报错：找不到类 oracle/apps/fnd/formsClient/FormsLauncher.class

Oracle EBS Home Page可以打开，但是无法打开EBS的Form，查看Java控制台，有错误报出。

载入：找不到类 oracle/apps/fnd/formsClient/FormsLauncher.class。
java.lang.ClassNotFoundException: oracle.apps.fnd.formsClient.FormsLauncher.class
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)

问题原因

问题的原因是因为在hosts文件中，EBS的URL对应了两个IP，一个是原来旧的IP地址，一个是新的IP地址。从hosts中删除旧的IP后，问题解决。

当然不是所有的找不到类 oracle/apps/fnd/formsClient/FormsLauncher.class错误都是因为hosts问题引起的。如果遇到这个错误，也可以尝试看看下边几个Notes是不是可以解决你的问题。

FormsLauncher.class Not Found Error When Attempting to Access Forms in Applications [ID 291698.1]
Load: Class Oracle/Apps/Fnd/Formsclient/Formslauncher.Class Not Found. [ID 373736.1]
Formslauncher.Class Not Found When Failing Over Using DNS Round Robin Load Balancing [ID 604040.1]
Deploying Sun JRE (Native Plug-in) for Windows Clients in Oracle E-Business Suite 11i [ID 290807.1]
Deploying Sun JRE (Native Plug-in) for Windows Clients in Oracle E-Business Suite Release 12 [ID 393931.1]
Can't Launch Forms in E-Business when accessed via VPN: Formslauncher Notinited [ID 471120.1]