java - 获取运行 Java 应用程序时使用的所有类的列表？

Question

获取运行 Java 应用程序时使用的所有类的列表的最简单方法是什么？

假设 com.package.Foo.main 是通过运行调用的:

java com.package.Foo

运行程序后，我想要一个在运行程序时使用的所有类的列表:

cat classes-used.txt
com.package.Foo
com.package.FooHelper
com.otherpackage.SomeClass
java.lang.String
java.util.List
java.util.ArrayList

在此上下文中，如果类已在程序执行期间由类加载器加载，并且如果存在此类静态 block ，则该类的静态 block 将被运行，则该类被定义为正在使用。

Answer 1

使用标志 verbose:class 运行 java

java -verbose:class com.package.Foo

将其附加到文件中:

java -verbose:class com.package.Foo > classes-used.txt

等

它还列出了定义这些文件的 jar:

比如这个类

public class Test {
     public static void main( String [] args ) {
     }
}

我有(除其他外)

$ java -verbose:class Test 
[Opened /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/classes.jar]
[Opened /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/ui.jar]
[Opened /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/laf.jar]
[Opened /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/jsse.jar]
[Opened /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/jce.jar]
[Opened /System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Classes/charsets.jar]
[Loaded java.lang.Object from shared objects file]
[Loaded java.io.Serializable from shared objects file]
[Loaded java.lang.Comparable from shared objects file]
[Loaded java.lang.CharSequence from shared objects file]
[Loaded java.lang.String from shared objects file]
[Loaded java.lang.reflect.GenericDeclaration from shared objects file]
[Loaded java.lang.reflect.Type from shared objects file]
[Loaded java.lang.reflect.AnnotatedElement from shared objects file]
[Loaded java.lang.Class from shared objects file]
[Loaded java.lang.Cloneable from shared objects file]
[Loaded java.lang.ClassLoader from shared objects file]
[Loaded java.lang.System from shared objects file]