Iterator it = map.entrySet().iterator();while(it.hasNext()){Entry item = it.next();
map.remove(item.getKey());}
这种方法会出现错误
正确的删除办法是
Iterator it = map.entrySet().iterator();
while (it.hasNext())
{
Entry item = it.next();
it.remove();
}
Iterator it = map.entrySet().iterator();while(it.hasNext()){Entry item = it.next();
map.remove(item.getKey());}
这种方法会出现错误
正确的删除办法是
Iterator it = map.entrySet().iterator();
while (it.hasNext())
{
Entry item = it.next();
it.remove();
}