java -cp可以报告在可执行类中导入的每个包中找到的jar或类文件吗？
[英]Can `java -cp` report the jar or class file which it finds for each package imported in an executable class?
问题描述
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？
1 个解决方案
解决方案1
1 2019-04-12 12:09:54
No ... and partly yes. 
不...部分是。
No because "importing" is a compile time concept only. 不可以，因为“导入”只是一个编译时概念。 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. 不需要为了使用它而import一个类，并且import语句实际上并不意味着该类已被实际使用。 Also, you don't import a package: you import classes from a package, or static members from a class. 另外，您不导入包：您从包中导入类，或者从类中导入静态成员。
Partly yes because the java -verbose:class option will log each class that gets loaded by the JVM. 部分原因是因为java -verbose:class选项将记录JVM加载的每个类。
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. 并且，如果您想静态查找给定类直接引用的所有其他类，则可以通过分析类.class文件来获取。
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