CATA

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package ander;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;

/**
 *
 * @author student
 */
public class johan {
    Connection conn;
   // JDBC driver name and database URL
   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
   static final String DB_URL = "jdbc:mysql://dbstud.cunbm.utcluj.ro:23306/sicall-andercaucornel";

   //  Database credentials
   static final String USER = "sicall-andercaucornel";
   static final String PASS = "Garcea";

   ArrayList<Student> studenti;

    public johan() {
        this.p();

    }

   public void p() {
   Statement stmt = null;
   try{
      //STEP 2: Register JDBC driver
      Class.forName("com.mysql.jdbc.Driver");

      //STEP 3: Open a connection
      System.out.println("Connecting to database...");
      conn = DriverManager.getConnection(DB_URL,USER,PASS);

      //STEP 4: Execute a query
      System.out.println("Creating statement...");
      stmt = conn.createStatement();
      String sql;
      sql = "SELECT id, nume, CNP,sex,medie FROM studenti";
      ResultSet rs = stmt.executeQuery(sql);

      studenti = new ArrayList<Student>();
      //STEP 5: Extract data from result set
      while(rs.next()){
         //Retrieve by column name
         int id  = rs.getInt("id");
         String nume = rs.getString("nume");
         String CNP = rs.getString("CNP");
         Double medie = rs.getDouble("medie");

         Student s = new Student(id, nume, CNP, medie);
         studenti.add(s);
         //Display values
         System.out.print("ID: " + id);
         System.out.print(", Nume : " + nume);
         System.out.print(", CNP : " + CNP);
         System.out.println(", Medie : " + medie);
      }
      //STEP 6: Clean-up environment
      rs.close();
      stmt.close();
      conn.close();
   }catch(SQLException se){
      //Handle errors for JDBC
      se.printStackTrace();
   }catch(Exception e){
      //Handle errors for Class.forName
      e.printStackTrace();
   }finally{
      //finally block used to close resources
      try{
         if(stmt!=null)
            stmt.close();
      }catch(SQLException se2){
      }// nothing we can do
      try{
         if(conn!=null)
            conn.close();
      }catch(SQLException se){
         se.printStackTrace();
      }//end finally try
   }//end try
   System.out.println("Goodbye!");
//end main

}
   public ArrayList<Student> getStudenti() {
       return this.studenti;
   }

}