set一边遍历一边删除
Set<String> set = new HashSet<String>();
set.add("a");
set.add("b");
set.add("c");
Set<String> setsSet = new HashSet<String>(set);
Iterator<String> iterator = setsSet.iterator();
while(iterator.hasNext()) {
String string = iterator.next();
set.remove(string);
}
System.out.println(set.size());
Processed:
0.019, SQL:
9
