通過(guò)Iterator遍歷set集合元素 遍歷不出來(lái)
public?void?testIterator(){
Set<Course>?set?=?new?HashSet<Course>();
Iterator<Course>?it?=?set.iterator();
System.out.println("通過(guò)Iterator遍歷");
while(it.hasNext()){
// System.out.println(it.hasNext());
// System.out.println(".....");
System.out.println(it.next());
}
}
2015-09-30
set里面沒(méi)有內(nèi)容