简单的问题(0分)

怎么从下面的语句中取得字段sum1的值
String sql2=new String();
sql2="select sum(sfje) as [sum1] from rs_ygzxx where bmbh='"+bmbh2+"'";
ResultSet rs1=flh.executeQuery(sql2);
Double sss=rs1;

看看行不行：
Double sss;
if (rs1.next()) sss = rs1.getDouble("sum1");