Restituzione Array

[Nio74]

Ho riscritto tutto cosi:

Modello:

ublic  class Busta implements Serializable{

        private static final long serialVersionUID = -6812221116817885840L;


        
    String Nbusta, Nome;




    public  Busta(String codice, String nome) {
        this.Nbusta = codice;
        this.Nome = nome;
    }




    public String getNbusta() {
        return Nbusta;
    }


    public void setNbusta(String nbusta) {
        this.Nbusta = nbusta;
    }


    public String getNome() {
        return Nome;
    }


    public void setNome(String nome) {
        this.Nome = nome;
    }




   
}

Server:

public class Server {

    static ArrayList<Busta> prova;
    


    public static void main(String srgs[]) {


        int count = 0;
        
        initList();


        //hard code to use port 8080
        try (ServerSocket serverSocket = new ServerSocket(6789)) {
            
            System.out.println("I'm waiting here: " + serverSocket.getLocalPort());
            
            while (true) {
                
                try {
                    Socket socket = serverSocket.accept();
                            
                    count++;
                    System.out.println("#" + count + " from "
                            + socket.getInetAddress() + ":" 
                            + socket.getPort());
                    
                    HostThread myHostThread = new HostThread(socket, count);
                    myHostThread.start();
                    
                } catch (IOException ex) {
                    System.out.println(ex.toString());
                }
            }
        } catch (IOException ex) {
            System.out.println(ex.toString());
        }
    }
    
    private static class HostThread extends Thread{
        
        private Socket hostThreadSocket;
        int cnt;
        
        HostThread(Socket socket, int c){
            hostThreadSocket = socket;
            cnt = c;
        }


        @Override
        public void run() {
            
            OutputStream outputStream;
            try {
                outputStream = hostThreadSocket.getOutputStream();
                try (ObjectOutputStream objectOutputStream = 
                    new ObjectOutputStream(outputStream)) {
                        objectOutputStream.writeObject(prova);
                }
            } catch (IOException ex) {
                System.out.println(ex.toString());
            }finally{
                try {
                    hostThreadSocket.close();
                } catch (IOException ex) {
                    System.out.println(ex.toString());
                }
            }


        }
    }
    
    private static void initList(){
        
       
      
         
        try
        {
            prova = new ArrayList<Busta>();
            String DATABASE_URL = "jdbc:ucanaccess:///OneDrive//Programmazione//Android//dati.mdb;password=gmpa;memory=false";
            
            Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
            Connection conn = DriverManager.getConnection(DATABASE_URL);
            System.out.println(conn);
            Statement s = conn.createStatement();
           
            ResultSet rs = s.executeQuery("SELECT * FROM [tabripa]");
            while (rs.next()) {
                
                
                prova.add( new Busta(rs.getString("Nbusta").toString(),rs.getString("Nome").toString()));
                //prova.add(new Busta("Nome","cognome"));
                
       
            }
            
           


            s.close();
            conn.close();
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }
        
        
    }

Client:

public class Server {

    static ArrayList<Busta> prova;
    


    public static void main(String srgs[]) {


        int count = 0;
        
        initList();


        //hard code to use port 8080
        try (ServerSocket serverSocket = new ServerSocket(6789)) {
            
            System.out.println("I'm waiting here: " + serverSocket.getLocalPort());
            
            while (true) {
                
                try {
                    Socket socket = serverSocket.accept();
                            
                    count++;
                    System.out.println("#" + count + " from "
                            + socket.getInetAddress() + ":" 
                            + socket.getPort());
                    
                    HostThread myHostThread = new HostThread(socket, count);
                    myHostThread.start();
                    
                } catch (IOException ex) {
                    System.out.println(ex.toString());
                }
            }
        } catch (IOException ex) {
            System.out.println(ex.toString());
        }
    }
    
    private static class HostThread extends Thread{
        
        private Socket hostThreadSocket;
        int cnt;
        
        HostThread(Socket socket, int c){
            hostThreadSocket = socket;
            cnt = c;
        }


        @Override
        public void run() {
            
            OutputStream outputStream;
            try {
                outputStream = hostThreadSocket.getOutputStream();
                try (ObjectOutputStream objectOutputStream = 
                    new ObjectOutputStream(outputStream)) {
                        objectOutputStream.writeObject(prova);
                }
            } catch (IOException ex) {
                System.out.println(ex.toString());
            }finally{
                try {
                    hostThreadSocket.close();
                } catch (IOException ex) {
                    System.out.println(ex.toString());
                }
            }


        }
    }
    
    private static void initList(){
        
       
      
         
        try
        {
            prova = new ArrayList<Busta>();
            String DATABASE_URL = "jdbc:ucanaccess:///OneDrive//Programmazione//Android//dati.mdb;password=gmpa;memory=false";
            
            Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
            Connection conn = DriverManager.getConnection(DATABASE_URL);
            System.out.println(conn);
            Statement s = conn.createStatement();
           
            ResultSet rs = s.executeQuery("SELECT * FROM [tabripa]");
            while (rs.next()) {
                
                
                prova.add( new Busta(rs.getString("Nbusta").toString(),rs.getString("Nome").toString()));
                //prova.add(new Busta("Nome","cognome"));
                
       
            }
            
           


            s.close();
            conn.close();
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }
        
        
    }

Funziona solo che invece di restituirmi i dati in formato string me li restituisce con il segnaposto in memoria:

provaserverclient3.Busta@448139f0provaserverclient3.Busta@7ba4f24f
provaserverclient3.Busta@7699a589
provaserverclient3.Busta@4dd8dc3
provaserverclient3.Busta@568db2f2
provaserverclient3.Busta@5fd0d5ae
provaserverclient3.Busta@16b98e56
provaserverclient3.Busta@27d6c5e0
provaserverclient3.Busta@15aeb7ab
provaserverclient3.Busta@6acbcfc0
provaserverclient3.Busta@3feba861
provaserverclient3.Busta@6f496d9f
provaserverclient3.Busta@10f87f48
provaserverclient3.Busta@2f4d3709
provaserverclient3.Busta@1d81eb93
provaserverclient3.Busta@34a245ab
provaserverclient3.Busta@6e8cf4c6
provaserverclient3.Busta@34c45dca
BUILD SUCCESSFUL (total time: 0 seconds)

[Ansharja]

Funziona solo che invece di restituirmi i dati in formato string me li restituisce con il segnaposto in memoria:

Questo puoi facilmente risolverlo ridefinendo il metodo toString() nella classe Busta, dove restituirai una stringa per te significativa (di solito si ritorna qualcosa come una concatenazione di nome campo : valore campo, poi scegli tu come separarli e se aggiungere altro (come il nome della classe)).