Java.sql.SQLException: ResultSet closed

Question

I can’t complete the further process because when I run this code I close the ResultSet. I am adding a value after 15 rows of the sqlite database table, and I want to find the average value of 15 rows, and this should be a repository in ArrayList.

Here is the code: -

try {
    Class.forName("org.sqlite.JDBC");
    c = DriverManager.getConnection("jdbc:sqlite:test.db");
    c.setAutoCommit(false);
    System.out.println("Opened database successfully3");
    stmt = c.createStatement();
    rs = stmt
            .executeQuery("SELECT TIME,BID,ASK FROM '" + title + "' ;");
    System.out.println("Opened database successfully 20");
    while (rs.next()) {
        i++;
        System.out.println(i);
        if (i > 15) {
            System.out.println("i am in");
            List<String> stocklist = new ArrayList<String>();
            String main = rs.getString(1);
            System.out.println(rs.getString(1));
            String s[] = main.split(" ", 2);
            String date = s[0];
            String time = s[1];
            stocklist.add(date);
            stocklist.add(time);
            stocklist.add(df.format(rs.getFloat("BID")));
            stocklist.add(df.format(rs.getFloat("ASK")));
            rs1 = stmt
                    .executeQuery("SELECT ASK FROM '" + title + "' ;");
            int j = 1;
            while (rs1.next()) {
                if (j < i) {
                    System.out.println(rs1.getFloat("ASK"));
                    avg = avg + rs1.getFloat("ASK");
                }
                j++;
            }
            rs1.close();

            System.out.println("i am out");
            avg = avg / 15;
            changepercent = ((rs.getFloat("ASK") - avg) / avg) * 100;
            stocklist.add(df.format(changepercent));
            stocklist.add("ETE");
            stocklist.add("HUN");
            stocklist.add("ALU");
            stocklist.add("ETE");
            stocklist.add("HUN");
            stocklist.add("ALU");
            stocklist.add("ETE");
            stocklist.add("HUN");
            hntm.addRow(stocklist);
        }
    }
    rs.close();
    stmt.close();
    c.close();
} catch (Exception e) {
    System.err.println(e.getClass().getName() + ": " + e.getMessage());
    System.exit(0);
}

Answer 1

you should not reuse the expression. When you create a new request, you need to use the new Statement object. Replace rs1 = stmt.executeQuery("SELECT ASK FROM '" + title + "' ;");withrs1=c.createStatement().executeQuery("SELECT ASK FROM '" + title + "' ;");

Answer 2

This is not the answer to this question, but I also had problems with java.sql.SQLException: ResultSet closed.

In my case, the query result was empty, so ResultSet returned closed.

PreparedStatement preparedStatement = connection.prepareStatement(sql);
preparedStatement.setString(1, email);
ResultSet resultSet = preparedStatement.executeQuery();

// resultSet closed == didn't find anything
if(resultSet.isClosed())
    return false;