什么时候以及为什么使用枚举是有用的？
When and why is it useful to use Enumeration?
什么时候使用 Java class Enumeration 以及为什么使用它有用？
Enumeration is largely obsolete. Per the Javadoc, it is an interface that generates a series of elements, one at a time. Successive calls to the nextElement method return successive elements of the series. It is the predecessor to Iterator 其中（根据 Javadoc）
Iterator takes the place of Enumeration in the Java Collections Framework.
什么时候使用 Java class Enumeration 以及为什么使用它有用？
Enumeration is largely obsolete. Per the Javadoc, it is an interface that generates a series of elements, one at a time. Successive calls to the nextElement method return successive elements of the series. It is the predecessor to Iterator 其中（根据 Javadoc）
Iteratortakes the place ofEnumerationin the Java Collections Framework.