Method for SQL statement

Question

I have repeated resultset object execute statements and would like to put them in a method if possible.
The repeated part is:
Resultset rs = statement.executeQuery("select max(id) from TableMain");
rs.next();
Here is an example of what I am doing now:
Statement statement = connection.createStatement();
if((a == 0) && (b > 0))
    Resultset rs = statement.executeQuery("select max(id) from TableMain");
    rs.next();
    a = rs.getInt(1);
    //my insert sql is here to insert into another table the value of the max id....
else if((c > 0) && (d == 0))
    Resultset rs = statement.executeQuery("select max(id) from TableMain");
    rs.next();
    c = rs.getInt(1);
   //my insert sql is here to insert into another table the value of the max id....
else if((f == 0) && (g > 0))
    Resultset rs = statement.executeQuery("select max(id) from TableMain");
    rs.next();
    f = rs.getInt(1);
   ///my insert sql is here to insert into another table the value of the max id....
}I need help on my attempt below because I am not sure how to do it:
public ResultSet getMaxId()
         Resultset rs = statement.executeQuery("select max(id) from TableMain");
         rs.next();
         return rs;
}Call it like this:
else if((f == 0) && (g > 0))
    getMaxId();
    f = rs.getInt(1);
   ///my insert sql is here to insert into another table the value of the max id....

Answer 1

I don't see how it's repeated; all of those are mutually exclusive blocks, only one of them will run. The only thing you seem to be doing different is assigning the max id value to different variables.
Statement statement = connection.createStatement();
    Resultset rs = statement.executeQuery("select max(id) from TableMain");
    int tempValue = 0;
    if ( rs.next() )
        tempValue = rs.getInt(1);
if((a == 0) && (b > 0))
    a = tempValue;
else if((c > 0) && (d == 0))
    c = tempValue;
else if((f == 0) && (g > 0))
    f = tempValue;
   ///my insert sql is here to insert into another table the value of the max id....----------------------------------------------------------------
People on the forum help others voluntarily, it's not their job.
Help them help you.
Learn how to ask questions first: http://faq.javaranch.com/java/HowToAskQuestionsOnJavaRanch
(Yes I know it's on JavaRanch but I think it applies everywhere)
EDIT: I don't know if you're doing it already but you should also use try-catch blocks and also, make sure you close your ResultSet, Statement and Connection in a finally block.
And where you have parameters for the query, use PreparedStatement instead of building the query yourself.
Edited by: nogoodatcoding on Oct 12, 2007 7:43 AM