exception. invalid cursor state

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please help me I have exception (invalid cursor state) what should I do ??

public void billnumber(){
       try{
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     Connection cn = DriverManager.getConnection("Jdbc:Odbc:ds_comboPractice");
    Statement stmt = cn.createStatement();
    rs = stmt.executeQuery("select max(Bill_Number) from combopractice");
    int a = rs.getInt(1);
    txt4.setText(String.valueOf(a));
        }
        catch (Exception ex){JOptionPane.showMessageDialog(this, ex.getMessage());
        
        }
    }

Posted 23-Dec-13 7:54am

Member 10484162

Updated 23-Dec-13 7:57am

Richard C Bishop

v2

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Sergey Alexandrovich Kryukov 23-Dec-13 14:02pm

In what line?
—SA

Member 10484162 23-Dec-13 14:26pm

after run this program. I got this error, champion please help me.

Sergey Alexandrovich Kryukov 23-Dec-13 15:48pm

You need to run it under the debugger and provide comprehensive exception information information, importantly, the line in code.
I am not familiar with the Java SQL binding you are using, but the one who is would need a good issue report from you. But you can just read the documentation.
—SA

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Xiao Ling · Answer 1 · 2013-12-23T15:43:00

Solution 1

Have you created the database correctly? also, you have to put username and password to the url. Here is a solution http://stackoverflow.com/questions/17663167/jdbc-driver-connection-problems-sun-jdbc-odbc-jdbcodbcdriver[^]

Posted 23-Dec-13 15:43pm

Xiao Ling

Shubhashish_Mandal · Answer 2 · 2013-12-23T19:53:00

Solution 2

Problem is here :

Java

int a = rs.getInt(1);

It should be like :

Java

while(rs.next()){
   int a = rs.getInt(1);
}

After getting the resultSet, you have to move the result set pointer(cursor) to the first row to point the first record.

Posted 23-Dec-13 19:53pm

Shubhashish_Mandal