为了更好地组织类，Java提供了包机制，用于区别类名的命名空间。 包的作用 1 把功能相似或相关的类或接口组织在同一个包中，方便类的查找和使用。 2 如同文件夹一样，包也采用了树形目录的存储方式。同一个包中的类名字是不同的，不同的包中的类的名字 ...

The Javadoc documentation for the Package class states: Package objects contain version information about the implementation and specification of a Java package. This versioning information is ...

As an alternative to rewriting the same code, many software development environments provide a library tool that organizes frequently used code. Once developers finish debugging some reusable code, ...

There are only half a dozen classes you really need to master to become competent in the world of functional programming. The java.util.function package contains well over 40 different components, but ...