Categories: Java; Tagged with: HashMap • Java • map; @ January 26th, 2010 10:43
// 2. 遍历map中所有的元素
Iterator>> iter = mapSheet.entrySet().iterator();
while(iter.hasNext()) {
Entry> entry = iter.next();
int sheetIndex = entry.getKey(); // Key
List listReportItems = entry.getValue(); // Value
}
Categories: Java; Tagged with: ArrayList • Java • map; @ January 28th, 2009 18:18某Map中散乱的存放着如下信息:
abce.com (1), cde.com (1), abc.com (3), def.com (1), abd.com (2), sfaf.com (1), bcd.com (2)
为了进行排寻 使用ArrayList的sort进行排序.
通过new ArrayList(collection) 将Map中的Value引用到新建立的ArrayList中,
//--以下为排序
ArrayList alDomains = new ArrayList();
alDomains = new ArrayList(domains.values());
System.out.println(alDomains);
Collections.sort(alDomains, null);
System.out.println(alDomains);
打印:
[abce.com (1), cde.com (1), abc.com (3), def.com (1), abd.com (2), sfaf.com (1), bcd.com (2)] – 排序前
[abc.com (3), abce.com (1), abd.com (2), bcd.com (2), cde.com (1), def.com (1), sfaf.com (1)] – 排序后