regarding row reading from Mysql ..

i am trying to read rows from mysql database.like

............
.........
while(rs.next){

x=rs.getstring("columnname");

}

my question is when a row is readed some action is to be perfromed.but in this case control goes to next row before completion of task.

how to handle it ,please help me if anyone aware of it.

Thanks ,
krishna umareddy.