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分享如何按顺序输出Hashtable中的值
<%
java.util.Hashtable ht = new java.util.Hashtable();
ht.put("a", "A");
ht.put("b", "B");
ht.put("c", "C");
java.util.Enumeration em = ht.keys();
while (em.hasMoreElements()) {
Object o = em.nextElement();
out.println(ht.get(o));
}
%>
输出结果是“B A C”，要怎么样才能输出“A B C”，就是按添加的先后顺序输出
java.util.Hashtable ht = new java.util.Hashtable();
ht.put("a", "A");
ht.put("b", "B");
ht.put("c", "C");
java.util.Enumeration em = ht.keys();
while (em.hasMoreElements()) {
Object o = em.nextElement();
out.println(ht.get(o));
}
%>
输出结果是“B A C”，要怎么样才能输出“A B C”，就是按添加的先后顺序输出
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Tasia 2004-10-23
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要有序的话就用List
redhatcn 2004-10-23
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谢谢！
nicememory 2004-10-22
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public static void main(String[] args)
{
Map map =Collections.synchronizedMap(new LinkedHashMap());
map.put("a", "A");
map.put("b", "B");
map.put("c", "C");
Set set = map.keySet();
Iterator it = set.iterator();
while (it.hasNext()) {
Object o = it.next();
System.out.println(map.get(o));
}
}
{
Map map =Collections.synchronizedMap(new LinkedHashMap());
map.put("a", "A");
map.put("b", "B");
map.put("c", "C");
Set set = map.keySet();
Iterator it = set.iterator();
while (it.hasNext()) {
Object o = it.next();
System.out.println(map.get(o));
}
}
