//To run the program , complile javac programname an 
// To run java <programname> sample
//Modified the driver from legacy to Universal
//by changing the Class.forName("COM.ibm.db2.jdbc.app.DB2Driver");
//to 
// Class.forName("com.ibm.db2.jcc.DB2Driver");


import java.sql.*; 
 
public class EzJava 
{
  public static void main(String[] args) 
  {
    String urlPrefix = "jdbc:db2:";
    String url;
    String s;
    Connection con;
    Statement stmt;
    ResultSet rs;
    
    System.out.println ("**** Enter class EzJava");
    
    // Check that first argument is a location name (DB2 UDB for z/OS(TM))
    // or database name (DB2 UDB for Linux, UNIX(R) and Windows(R))
    if (args.length==0)
    {
  System.err.println ("Invalid value. First argument must specify a " + "location or database name.");
      System.exit(1);
    }
    url = urlPrefix + args[0];	
 
    try 
    { 
      // Load the DB2 Universal JDBC Driver
//      Class.forName("COM.ibm.db2.jdbc.app.DB2Driver");

        Class.forName("com.ibm.db2.jcc.DB2Driver");
      System.out.println("**** Loaded the JDBC driver");
 
      // Create the connection using DB2 Universal JDBC Driver type 4connectivity
      con = DriverManager.getConnection(url);
      System.out.println("**** Created a JDBC connection to the data source");
 
      // Create the Statement
      stmt = con.createStatement(); 
      System.out.println("**** Created JDBC Statement object");
 
      // Execute a query and generate a ResultSet instance
      rs = stmt.executeQuery("SELECT EMPNO FROM DB2LEDU.EMPLOYEE"); 
      System.out.println("**** Created JDBC ResultSet object");
 
      // Print all of the employee numbers to standard output device
      while (rs.next()) {
        s = rs.getString(1);
        System.out.println("Employee number = " + s);
      }
      System.out.println("**** Fetched all rows from JDBC ResultSet");
 

      // Close the ResultSet
      rs.close();
      System.out.println("**** Closed JDBC ResultSet");
      
      // Close the Statement
      stmt.close();
      System.out.println("**** Closed JDBC Statement");
 
      // Connection must be on a unit-of-work boundary to allow close
      con.commit();
      System.out.println ( "**** Transaction committed" );
      
      // Close the connection
      con.close(); 
      System.out.println("**** Disconnected from data source");
 
      System.out.println("**** JDBC Exit from class EzJava - no errors");
 
    }
    
    catch (ClassNotFoundException e)
    {
      System.err.println("Could not load JDBC driver");
      System.out.println("Exception: " + e);
      e.printStackTrace();
    }
 
    catch(SQLException ex)
    {
      System.err.println("SQLException information");
      while(ex!=null) {
        System.err.println ("Error msg: " + ex.getMessage());
        System.err.println ("SQLSTATE: " + ex.getSQLState());
        System.err.println ("Error code: " + ex.getErrorCode());
        ex.printStackTrace();
        ex = ex.getNextException(); // For drivers that support chained exceptions
      }
    }
  }  // End main
}    // End EzJava