Java.sql : Cannot retrieve records from Oracle 9i with JDK 1.5

Question

I think I'm doing everything right, but still the following code does not
return any rows. I have the classpath set correctly and ojdbc14.jar in
the path. I'm using jdk 1.5.     
What am I missing? Any help greatly appreciated. Thanks!
     Connection conn = null;
     String serverName = "MySvr";
     String portNumber = "1521";
     String sid = "mySID";
     String myURL = "jdbc:oracle:thin:@" + serverName + ":" + portNumber + ":" + sid;
     logger.writeLog("URL: " + myURL);
     String username = "scott";
     String password = "tiger";
     String query = "select 'test' from dual";
     DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
     conn = DriverManager.getConnection(myURL, username, password);
     Statement stmt = conn.createStatement();
     rs = stmt.executeQuery(query);
     logger.writeLog("Cur Row : " + rs.getRow());
-----> returns 0
     while (rs.next()) {
------> throws java.lang.NullPointerException
     }

Answer 1

I think I'm doing everything right, but still the following code does not
return any rows. JDBC didn't change from 1.4 to 1.5, so that's a red herring. It's you, not the JVM.
I have the classpath set correctly Really? A system CLASSPATH environment variable? I'd say that's wrong. Better to use the -classpath option on javac.exe when you compile and java.exe when you run.
and ojdbc14.jar in the path. You'd better mean CLASSPATH and not PATH. CLASSPATH is for the Java class loader; PATH is for the operating system. Don't get the two confused.
I'm using jdk 1.5.     Irrelevant here.
What am I missing? Any help greatly appreciated. Thanks!I think you're using ResultSet incorrectly, because it's never null.
Try this:
// I'd externalize this so you could change it on the fly.
String driver = "oracle.jdbc.driver.OracleDriver";
String url = "jdbc:oracle:thin:@MySvr:1521:mySID";
// I hope you're not using the default username and password for real
String username = "scott"; 
String password = "tiger";
logger.writeLog("URL: " + url);
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try
    Class.forName(driver);
    conn = DriverManager.getConnection(url, username, password);
    String sql = "select 1 from dual";
    stmt = conn.createStatement();
    rs   = stmt.executeQuery(sql);
    int value;
    while (rs.next())
        value = rs.getInt(1);
catch (SQLException e)
    e.printStackTrace();
finally
    // I'd put all these in a utility class
    try { if (rs != null) rs.close(); } catch (SQLException e) { logger.writeLog("could not close result set"); }
    try { if (stmt != null) stmt.close(); } catch (SQLException e) { logger.writeLog("could not close statement"); }
    try { if (conn != null) conn.close(); } catch (SQLException e) { logger.writeLog("could not close connection"); }
}Note: close your resources in a finally block. It's important, especially if you don't want to run out of Oracle cursors.
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