Java Enumeration(枚举)接口

枚举(The Enumeration)接口定义了一种从数据结构中取回连续元素的方式。

Java8中Enumeration接口的源码:

public interface Enumeration<E> {
/**
     * Tests if this enumeration contains more elements.
     *
     * @return  <code>true</code> if and only if this enumeration object
     *           contains at least one more element to provide;
     *          <code>false</code> otherwise.
     */
boolean hasMoreElements();//测试次枚举是否含有更多的元素

/**
     * Returns the next element of this enumeration if this enumeration
     * object has at least one more element to provide.
     *
     * @return     the next element of this enumeration.
     * @exception  NoSuchElementException  if no more elements exist.
     */
E nextElement();//如果此枚举对象还有下一个可提供元素,则返回下一个元素
}

实例:

  public static void main(String[] args) {
    Enumeration<String> enumeration;
    Vector<String> vc=new Vector<>();
    vc.add("name");
    vc.add("sex");
    vc.add("address");
    enumeration=vc.elements();
    while (enumeration.hasMoreElements()){
      System.out.println(enumeration.nextElement());
    }

输出结果:
name
sex
address

原文地址:https://www.cnblogs.com/pengcool/p/15516405.html