Enumeration是一个接口,主要提供了枚举集合对象中所有对象的功能。
建议使用Iterator接口,它提供了和Enumeration一样的功能,而且还有删除集合元素的方法。hasMoreElements()方法用来判断Enumeration接口中是否还有元素,返回一个boolean值。
建议使用Iterator接口,它提供了和Enumeration一样的功能,而且还有删除集合元素的方法。hasMoreElements()方法用来判断Enumeration接口中是否还有元素,返回一个boolean值。
搞java一定要有jdk文档的
Enumeration 是一个快要过时的接口
<------ 仁者见仁,智者见智------>
Interface Enumeration
All Known Subinterfaces:
NamingEnumeration public interface Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time. Successive calls to the nextElement method return successive elements of the series. For example, to print all elements of a vector v: for (Enumeration e = v.elements() ; e.hasMoreElements() ;) {
System.out.println(e.nextElement());
}
Methods are provided to enumerate through the elements of a vector, the keys of a hashtable, and the values in a hashtable. Enumerations are also used to specify the input streams to a SequenceInputStream. NOTE: The functionality of this interface is duplicated by the Iterator interface. In addition, Iterator adds an optional remove operation, and has shorter method names. New implementations should consider using Iterator in preference to Enumeration.
引用楼上的javadoc:
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NOTE: The functionality of this interface is duplicated by the Iterator interface. In addition, Iterator adds an optional remove operation, and has shorter method names. New implementations should consider using Iterator in preference to Enumeration.
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