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POResult set usage when expected one int value only
 

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  1. POResult set usage when expected one int value only
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    <p>I know it is basics and probably really simple, but I'm struggling with the following situation where i want to query the database for a specific int(id in my case), but somehow i can't acces the returned data from the data set. </p> <p>I have tested the query in db managment system and it works. I get no errors/ stacks but the result of my method is always -1.(Which means it fails :( because no int has been parsed)</p> <p>code:</p> <pre><code>public int UserFactoryEngine(String n, String p){ // query for user data, validate and return Connection conn = null; try { Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance(); } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) { System.out.println("Failure intialization of the driver! "); e.printStackTrace(); } String connectionUrl = "jdbc:sqlserver://localhost:1433;" + "databaseName=BugsSurveillance;user=sa;password=1234;integratedSecurity=true;"; try { conn = DriverManager.getConnection(connectionUrl); } catch (SQLException e) { System.out.println("Failure intialization of the connection! "); e.printStackTrace(); } System.out.println("Connected... "); String sqlquery; PreparedStatement preparedStatement; ResultSet rs; try { preparedStatement = conn.prepareStatement("SELECT id FROM Users WHERE name = ? AND pass = ? ", ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); preparedStatement.setString(1, n); preparedStatement.setString(2, p); rs = preparedStatement.executeQuery(); while (rs.next()){ System.out.println(rs.getInt(1)); } } catch (SQLException e) { System.out.println("Prepared statement failure!"); e.printStackTrace(); } return -1; } </code></pre>
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    1. This table or related slice is empty.
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    1. USBogdan M.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. COYour method is always returning -1. What is the output of `System.out.println(rs.getInt(1))?`
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      1. POResult set usage when expected one int value only
      1. USOsvaldo Costa
    2. COnada, no print no nothing... :( it is like nothing is returned and i suppose the sys out wont print anything, not even new line :s
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      1. POResult set usage when expected one int value only
      1. USBogdan M.
    3. COIt means that your program doesn't enter in the `while()` loop. Do you have records in your table?
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      1. POResult set usage when expected one int value only
      1. USOsvaldo Costa
 

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