how to find whether a result set is null or not

hi guys...i am new to jsp...does any one know how to detect whether a result set in null or not....here i was writing a small prog on jsp..and in that prog i hve to check for a value which is there in the database or not..i hve executed the query using

rs=statement.executeQuery("SELECT * from user_accounts WHERE id='"+record_id+"'");

here record_id id the primery key

and i hve written a statement

try
{
rs.next();
}catch(SQLException e)
{
flag=true;
}

and sometimes it doest works that is it doesnt detects if the result set is null

is the any other way to the same procedure

Use this sentence previously to rs.next():


if (rs!=null)
{
while(rs.next())
{
//Do whatever
}
}

Answer provided by http://www.consultoriajava.com