数组遍历Iterator

Set<String> set =new HashSet<String>;

set.add("LiLei");

set.add("xiaoming");

set.add("xiaohong");

1)

Iterator<String> it  = set.iterator();

while(it.hasNext()){

System.out.println(set)

}

2)

Iterator<String> it  = set.iterator();

for(Object element :set){

sout(element)

}

3)

Iterator<String> it  = set.iterator();

for(i=0;i<set.Size();i++){

sout(set.get(i))

}

4)

for(Iterator<String> it  = set.iterator();it.hasNext();){

}