问题
When trying to register an MBean in JMX Console I'm getting the following error message:
The package javax.management is accessible from more than one module: <unnamed>, java.management
I'm using Eclipse and I have no module-info.java file in my project structure.
The error disappear when I comment my dependency for Java EE API, but the javax.management package is not part of the JAR.
回答1:
I experienced similar issue when updating from java 8 to java 11. Steps below helped me,
- Right click Eclipse project > Properties > Java Build Path
- In Libraries tab, remove all the external jar files under Modulepath and add them under Classpath (you can just select all the jars and drag them under Classpath)
- Click Apply and Close
Note: JRE System Library will remain under Modulepath.
Eclipse version: 2019-09
回答2:
Are you using Java-1.8? Because it is default package no need to add dependency for that.
回答3:
I was using java11, after switching back to java 8 helped me to resolve these issues in java build path.
来源：https://stackoverflow.com/questions/55902512/package-accessible-from-more-than-one-module-unnamed