我只是想知道是否需要在下面的 A 点检查 null。那时它会为空吗?或者它只会是空的/非空的?
提前谢谢您的帮助!
List myList = new ArrayList();
PreparedStatement ps = null;
ResultSet rs = null;
String sql ="SELECT * FROM XXXXX";
ps = getDBConnection.prepareStatement(sql);
rs = ps.executeQuery();
while (rs.next()) {
//Add the row to myList using myList.add...
}
if (myList != null){ //POINT A
//Implement some logic
}
..