Print a specific cell from a string array

I’ve created a class that includes people data named "Datiutente" and an object based on that class named "du". Every person has a name and a surname (with the set/get methods).

I want to create a system that can provide the user information on a specific person based on the position which they are stored in the array.

I tried using a variable named vd to ask the user which person wanted to visualize based on the position that a person gained in the array (inserted in the for cycle), but when I try to print with vd it just prints "Name: null". Same if I change "vd" to "1". It always prints "Null".

Yes, I tested this when I already inserted some data.

do {
    System.out.println("what do you want to do?");
    System.out.println("1 - check for a person");
    System.out.println("2 - Add person");
//    System.out.println("3 - Delete person");
    int choice = Integer.parseInt(keyb.readLine());
    Datiutente du[] = new Datiutente[10];
    
    if (choice == 2){
        System.out.println("How many people?");
        int hm = Integer.parseInt(keyb.readLine());
        
        for (int i=0;i<hm;i++){
            du[i] = new Datiutente();
            System.out.println("insert name:");
            du[i].setName(keyb.readLine());
            System.out.println("insert surname");
            du[i].setSurname(keyb.readLine());
        }  
    }
    
    if (choice == 1){
        System.out.println("which person are you searching?");
        int vd = Integer.parseInt(keyb.readLine());
        System.out.println("position: " + vd);
        System.out.println("Name: "+  du[vd]);
        System.out.println("Surname: " + du[vd]);
    }

there’s the full code:

package appartamento;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Appartamento {

    public static void main(String[] args) throws IOException {
        InputStreamReader input = new InputStreamReader(System.in);
        BufferedReader keyb = new BufferedReader(input);
        boolean attiva = true;
        
        do {
        System.out.println("what do you want to do?");
        System.out.println("1 - check for a person");
        System.out.println("2 - Add person");
    //    System.out.println("3 - Delete person");
        int choice = Integer.parseInt(keyb.readLine());
        Datiutente du[] = new Datiutente[10];
        
        if (choice == 2){
            System.out.println("How many people?");
            int hm = Integer.parseInt(keyb.readLine());
            
            for (int i=0;i<hm;i++){
                du[i] = new Datiutente();
                System.out.println("insert name:");
                du[i].setName(keyb.readLine());
                System.out.println("insert surname");
                du[i].setSurname(keyb.readLine());
                        }  
        }
        
        if (choice == 1){
            System.out.println("which person are you searching?");
            int vd = Integer.parseInt(keyb.readLine());
            System.out.println("position: " + i);
            System.out.println("Name: "+  du[i]);
            System.out.println("Surname: " + du[i]);
            
        }
        
        
        
        
    } while (attiva = true); 
    
    }
}

and there’s the class "Datiutente":

package appartamento;

public class Datiutente {
    private String name;
    private String surname;
    private String codfis;
    
    public void setName(String name){
        this.name = name;
    }
    
    public String getName(){
        return name;
    }
    
    public void setSurname(String surname){
        this.surname = surname;
    }
    
    public String getSurname(){
        return surname;
    }
    
    
}

>Solution :

In every iteration you define the Datiutente du[] = new Datiutente[10];, so du is reset to {null,...,null} and the data saved in the previous iteration are replaced;
Try to define the array before the loop statement.