A sense of humor keen enough to show a man his own absurdities will keep him from the commission of all sins, or nearly all, save those that are worth committing.
java.lang.reflect contains the reflection package, the classes you can use to examine a type in detail. You can write a complete type browser using these classes, or you can write an application that interprets code that a user writes, turning that code into actual uses of classes, creation of objects, invocations of methods, and so on. Almost all the types mentioned in this discussion on reflection are contained in the package
java.lang.reflect, except for the classes
Package, which are part of the package
java.lang, and ...