摘要： Stringa="Aa";Stringb="BB";System.out.println(a.hashCode());System.out.println(b.hashCode());Hashtable<String,String>map=newHashtable<String,String>();map.put(a,"test");map.put(a,"test");System.out.println(map.size());System.out.println(map.get(a)); 阅读全文