How can I get a complete list of all classes loaded in the JVM, including those from specific packages and their descendants?

Obtain a Comprehensive List of Classes Loaded in the JVM

Question:

Finding a method to retrieve a complete list of all classes loaded into the JVM, irrespective of their prior load status, is a common requirement. This list should include classes belonging to a specific package and their descendants.

Answer:

While there may not be a direct programmatic solution, there exists a convenient alternative:

Utilizing "-verbose:class" Command-Line Option:

By executing the following command:

java -verbose:class ....

The JVM will provide a verbose readout of all classes being loaded, along with the locations from which they are retrieved. Here's an example of such output:

[Opened /usr/java/j2sdk1.4.1/jre/lib/rt.jar]
[Opened /usr/java/j2sdk1.4.1/jre/lib/sunrsasign.jar]
[Opened /usr/java/j2sdk1.4.1/jre/lib/jsse.jar]
[Opened /usr/java/j2sdk1.4.1/jre/lib/jce.jar]
[Opened /usr/java/j2sdk1.4.1/jre/lib/charsets.jar]
[Loaded java.lang.Object from /usr/java/j2sdk1.4.1/jre/lib/rt.jar]
[Loaded java.io.Serializable from /usr/java/j2sdk1.4.1/jre/lib/rt.jar]
[Loaded java.lang.Comparable from /usr/java/j2sdk1.4.1/jre/lib/rt.jar]
[Loaded java.lang.CharSequence from /usr/java/j2sdk1.4.1/jre/lib/rt.jar]
[Loaded java.lang.String from /usr/java/j2sdk1.4.1/jre/lib/rt.jar]

This output clearly shows the loading process and the source locations of the classes.

For more detailed information, refer to: [JVM -verbose Argument Documentation](https://docs.oracle.com/javase/7/docs/technotes/tools/windows/java.html#verbose).

The above is the detailed content of How can I get a complete list of all classes loaded in the JVM, including those from specific packages and their descendants?. For more information, please follow other related articles on the PHP Chinese website!