Can `java -cp` report the jar or class file which it finds for each package imported in an executable class?

Question

当使用java -cp path1:path2:path3 SomeClass执行一个类时，是否可以让java报告它为在该类中导入的每个包找到的jar或类文件名和路径名？

Answer 1

No ... and partly yes.

No because "importing" is a compile time concept only. There is no need to import a class in order to use it, and an import statement doesn't actually mean that the class is actually used. Also, you don't import a package: you import classes from a package, or static members from a class.

Partly yes because the java -verbose:class option will log each class that gets loaded by the JVM.

And if you want to statically find all of the other classes that are directly referenced by a given class it is possible to get this by analyzing the classes .class file.