问题
I have a legacy Java (8) project opened in Eclipse with Java 11 (or Java 10). Eclipse is now rightly complaining about inaccessible packages. E.g. com.apple.laf.AquaComboBoxUI.
When compiling from command line I can make those packages accessible explicitly by adding a parameter to javac:
--add-exports java.desktop/com.apple.laf=ALL-UNNAMED
Is there a way to do the same from inside the Eclipse IDE? I tried to add an accessible rule on the JDK library. But that seems to have no effect. Any ideas?
And yes, I know, we should migrate the project to use only official APIs. But that's a long, long way...
回答1:
I'm answering my own question, since I found a solution.
- In Eclipse settings navigate to: Java Build Path → Libraries → Modulepath → JRE System Library
- Expand it and double click on: Is modular (modifies encapsulation)
- Switch to Details tab
- Add a new export: E.g. java.desktop → com.apple.laf
回答2:
You need to setup problem severity. This falls under forbidden reference (access rules) under Java Compiler -> Errors/Warnings.
回答3:
As mentioned here you can add the parameters passed with javac in command line to Eclipse with these steps:
Click on
Run->Run Configurations.In the window that appeared under
Main tabBrowse the projectand theMain classfor which you want to pass the arguments.- Now click on the
Argumentstab. - In the text-box labeled
Program arguments:, type${string_prompt} - Click on
Apply and Close.
Now when you run your Java application a prompt will appear. You can add all your arguments separated with space here.
来源：https://stackoverflow.com/questions/52343704/how-to-make-an-internal-java-package-accessible-in-eclipse