使用ArrayList代理进行Map的排序

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

HashSet – 覆盖equals, hashCode <-> AWT中使用文件选择器 Use FileDialog in AWT