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copied!<p>Run java with the flag <strong>verbose:class</strong></p> <pre><code>java -verbose:class com.package.Foo </code></pre> <p>To append it to a file:</p> <pre><code>java -verbose:class com.package.Foo > classes-used.txt </code></pre> <p>etc. </p> <p>It also list the jar where those files are defined:</p> <p>For instance for this class</p> <pre><code>public class Test { public static void main( String [] args ) { } } </code></pre> <p>I've got ( among others ) </p> <pre> $ 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] </pre>

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