启动Java Applet时控制台报缺失清单属性错误求解决方案

Hey there, let's sort out this error you're encountering when launching your Java Applet. That Missing Application-Name manifest attribute warning is easy to resolve with a few simple steps:

Step 1: Create/Edit the MANIFEST.MF file #

You need to add the required Application-Name attribute to your ORBIClient.jar's manifest. If you don't already have a custom MANIFEST.MF, create a new text file with this content:

Manifest-Version: 1.0
Application-Name: ORBI Client Applet

Note: You can replace "ORBI Client Applet" with any name that makes sense for your application.

If you already have a MANIFEST.MF for the jar, just append the Application-Name line to it (make sure it's in the main section of the manifest).

Step 2: Re-package the ORBIClient.jar #

Use the jar command to re-build your jar with the updated manifest. For example:

jar cfm ORBIClient.jar MANIFEST.MF path/to/your/class/files path/to/resources

If you're using an IDE like Eclipse or IntelliJ, you can configure your project's build settings to use this custom MANIFEST.MF file, then rebuild the jar directly from the IDE.

Step 3: Update the jar on your server #

Replace the old ORBIClient.jar at http://localhost:7001/config_files/ with your newly packaged jar. Restart your Applet and check the console— the missing attribute warning should be gone.

A quick note on the other logs #

The lines about handleLaunchJVM() and RemoteJVMLauncher.setCallBack are just debug-level logs from the Applet's JVM launch process. They don't indicate an error on their own, and fixing the manifest issue should resolve the primary warning you're seeing.

内容的提问来源于stack exchange，提问作者Nandini Ramagiri