HashMap Stuff

package com;

public class Supplier {
int supp_number;   
String supp_name;

public Supplier(int supp_number, String supp_name) {   
    this.supp_number = supp_number;   
    this.supp_name = supp_name;   
} 

}
-------------------------
package com;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
//import java.sql.SQLException;
import java.sql.Statement;
//import java.util.ArrayList;
import java.util.HashMap;
//import java.util.List;
import java.util.Map;

public class hashMapEx {
    public static void main(String[] argv) {

        System.out.println("-------- Oracle JDBC Connection Testing ------");

        try {

            Class.forName("oracle.jdbc.driver.OracleDriver");

        } catch (ClassNotFoundException e) {

            System.out.println("Where is your Oracle JDBC Driver?");
            e.printStackTrace();
            return;

        }

        System.out.println("Oracle JDBC Driver Registered!");

        Connection connection = null;

        try {
            connection = DriverManager.getConnection("jdbc:oracle:thin:@Lalama-Acer:1521:xe", "test_user", "test_user");

        } catch (SQLException e) {
            System.out.println("Connection Failed! Check output console");
            e.printStackTrace();
            return;

        }

        if (connection != null) {
            System.out.println("You made it, take control your database now!");
        } else {
            System.out.println("Failed to make connection!");
        }
       
        try {
String query = "select supp_number, supp_name from test_supplier";
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery(query);
//ResultSetMetaData rsmd = rs.getMetaData();

/*
List columns = new ArrayList(rsmd.getColumnCount());
for(int i = 1; i <= rsmd.getColumnCount(); i++){
columns.add(rsmd.getColumnName(i));
}
*/

int seq = 1;
Map hmap=new HashMap(); 
while(rs.next()){
Supplier supp = new Supplier(Integer.parseInt(rs.getString("supp_number")), rs.getString("supp_name"));
hmap.put(seq, supp);
seq++;

}

//System.out.println(data);
rs.close();
stmt.close();
connection.close();

for(Map.Entry entry:hmap.entrySet()){    
int keycol=entry.getKey();
Supplier subObj=entry.getValue();
System.out.println(" Details: "+keycol+" Supplier Number: "+ subObj.supp_number+" Supplier Name: "+subObj.supp_name); 
}
       
        } catch (Exception e) {
            System.out.println("Issue in mapping to HashMap");
            e.printStackTrace();
            return;
       
        }
       
    }
}