Connecting to postgres database in java code

To connect you java program with postgres driver, add the postgres library jar (postgresql-jdbc3-8.2.jar or any current jar file) file in the libraries. Then the following code can be modified for your particular database and table.

package javaapplication1;
import java.sql.*;
 * @author shankar
public class Main {

     * @param args the command line arguments
    public static void main(String[] args) {
        // TODO code application logic here
          System.out.println("-------- PostgreSQL JDBC Connection Testing ------------");

      try {
            Connection connection = null;

             connection = DriverManager.getConnection("jdbc:postgresql://","postgres", "postgres");
       if (connection != null)
                  Statement s=connection.createStatement();
                  String query="select ad_alert_id from ad_alert";
                  ResultSet rs=s.executeQuery(query);
                      System.out.print(" "+rs.getString(1));

              System.out.println("Connection Failed!");
          catch(Exception e){


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