Eclipse如何记住Java文件中方法的折叠/展开状态？

Absolutely, you can get Eclipse to remember your personalized folding/unfolding settings for each Java file—no need to reset everything every time you launch the IDE. Here's exactly what to do:

Step 1: Enable Folding State Persistence #

1. Open Eclipse's preferences:
   • On Windows/Linux: Go to Window > Preferences
   • On Mac: Go to Eclipse > Settings
2. Navigate to the path Java > Editor > Folding
3. Scroll down to the Initial folding state section
4. Check the box labeled Restore folding state from previous session
5. Click Apply and Close to save the change

This is the key setting that tells Eclipse to save your exact folding choices (which methods are folded, which are expanded) for each file when you close the IDE, and reload them next time you start it.

Troubleshooting If It Doesn't Work #

If you still find your folding states resetting after enabling the above option, try these fixes:

• Quit Eclipse properly: Avoid force-closing the IDE (like ending the process via task manager). Eclipse needs time to write the folding state data to your workspace's .metadata folder on normal exit.
• Clear workspace history cache:
  1. Close Eclipse completely
  2. Navigate to your workspace folder, then go to .metadata/.plugins/org.eclipse.core.resources/.history
  3. Delete all files in this .history directory (this won't touch your actual code files, just cached resource data)
  4. Restart Eclipse, set your desired folding states for your files, then quit normally. The states should now persist.
• Check for conflicting plugins: Some code formatting or auto-organizing plugins might override folding states. If you've recently installed a new plugin, try disabling it temporarily to see if that fixes the issue.

内容的提问来源于stack exchange，提问作者Annabelle