Hash:
HashSet set = new HashSet()
set.add("India")
set.add("USA")
set.add("China")
log.info "Set size is : " + set.size()
set.add("China")
log.info "Set size is : " + set.size()
Iterator iter = set.iterator();
log.info "If has next : " +iter.hasNext()
log.info iter.next()
while(iter.hasNext()){
log.info iter.next()
}
Result :
Tue Jun 16 15:02:49 CST 2015:INFO:Set size is : 3
Tue Jun 16 15:02:49 CST 2015:INFO:Set size is : 3
Tue Jun 16 15:02:49 CST 2015:INFO:If has next : true
Tue Jun 16 15:02:49 CST 2015:INFO:USA
Tue Jun 16 15:02:49 CST 2015:INFO:China
Tue Jun 16 15:02:49 CST 2015:INFO:India
Hashtable :
Hashtable table = new Hashtable()
table.put("name","Henry")
table.put("country","Russia")
table.put("telephone","13658988546")
table.put("email","henry.wasley@gmail.com")
log.info "Size of table is " + table.size()
log.info "Name is " + table.get("name")
log.info "Country is " + table.get("country")
Result :
Tue Jun 16 15:06:55 CST 2015:INFO:Size of table is 4
Tue Jun 16 15:06:55 CST 2015:INFO:Name is Henry
Tue Jun 16 15:06:55 CST 2015:INFO:Country is Russia
[Groovy] HashSet and Hashtable
原文：http://www.cnblogs.com/MasterMonkInTemple/p/4580857.html