log.properties :-

oracle.jdbc.driver.level=INFO
oracle.jdbc.driver.handlers=java.util.logging.ConsoleHandler
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter

Test.java:-

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import oracle.jdbc.OracleConnection;
import oracle.jdbc.pool.OracleDataSource;

public class Test
{
public static void main(String[] args)
{
String url = “jdbc:oracle:thin:@//test:1521/orcl”;
String user = “scott”;
String password = “tiger”;

try
{
OracleDataSource ods = new OracleDataSource();
ods.setURL(url);
ods.setUser(user);
ods.setPassword(password);

OracleConnection conn = (OracleConnection) ods.getConnection();
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(“select * from session_roles”);

while (rs.next())
{
System.out.println(rs.getString(“role”));
System.out.println(rs.getString(“invalidcolumn”));
}
rs.close();
stmt.close();

}
catch (SQLException se) { throw new RuntimeException(se); }
}
}

Output :-

RESOURCE
15/05/2009 10:03:22 oracle.jdbc.driver.PhysicalConnection setAutoCommit
INFO: PhysicalConnection.setAutoCommit(autoCommit=true)
15/05/2009 10:03:22 oracle.jdbc.driver.PhysicalConnection setAutoCommit
INFO: PhysicalConnection.setAutoCommit(autoCommit): return
15/05/2009 10:03:22 oracle.jdbc.driver.PhysicalConnection getDefaultFixedString
INFO: PhysicalConnection.getDefaultFixedString() returning false
15/05/2009 10:03:22 oracle.jdbc.driver.OracleStatement executeQuery
INFO: OracleStatement.executeQuery(sql) needToPrepareDefineBuffer = true
15/05/2009 10:03:23 oracle.jdbc.driver.T4CStatement allocateTmpByteArray
SEVERE: oracle.jdbc.driver.T4CStatement.allocateTmpByteArray : Re-allocate byte array of size : 120
15/05/2009 10:03:23 oracle.jdbc.driver.OracleResultSetImpl findColumn
INFO: OracleResultSetImpl.findColumn(columnName=role)
15/05/2009 10:03:23 oracle.jdbc.driver.OracleResultSetImpl getString
INFO: OracleResultSetImpl.getString(columnIndex=1)
15/05/2009 10:03:23 oracle.jdbc.driver.OracleResultSetImpl findColumn
INFO: OracleResultSetImpl.findColumn(columnName=invalidcolumn)
15/05/2009 10:03:23 oracle.jdbc.driver.DatabaseError findMessage
WARNING: DatabaseError.findMessage(errNum, obj): returned Invalid column name