Searching data from arraylist

I am a newbie of c++. Now I am doing a project need to read a customer list from a csv file and then search if there is a username like "Ali" and printout all the data about Ali. How can I search "Ali" and printout all the data about Ali like CustomerNo , Name , PhoneNo and Status? And if there is multiple data with "Ali" , how can I printout all of them either? Here is my code:

import java.io.IOException;  import java.nio.file.Files;  import java.nio.file.Paths;  import java.util.ArrayList;  import java.util.List;  import java.util.Scanner;  import java.util.Iterator;    public class LoadCustomer {      public static void main(String[] args) throws IOException{          System.out.println ("Load customer from file");          ArrayList<Customer> customers = readCustomerFromFile();                System.out.println (customers);          System.out.println ();              private static ArrayList<Customer> readCustomerFromFile() throws IOException{          ArrayList<Customer> customers = new ArrayList<>();          List<String> lines = Files.readAllLines(Paths.get("customer.csv"));          for (int i = 1 ; i < lines.size() ; i++){              String[] items = lines.get(i).split(",");              int customerNo = Integer.parseInt(items[0]);              int phoneNo = Integer.parseInt(items[2]);              customers.add (new Customer(customerNo,items[1],phoneNo,items[3]));          }          return customers;      }  }  

Here is my Customer class:(added getName getter)

public class Customer {  private int customerNo;  private String name;  private int phoneNo;  private String status;  public Customer () {}  public Customer (int customerNo, String name, int phoneNo, String status){      this.customerNo = customerNo;      this.name = name;      this.phoneNo = phoneNo;      this.status = status;  }  public String getName(){      return name;  }    public String toString(){      return customerNo + " " + name + " " + phoneNo + " " + status;  }  public String toCSVString(){      return customerNo + "," + name + "," + phoneNo + "," + status;  }  }  

And here is my data:

 CustomerNo            Name       PhoneNo     Status      1                  Ali        12345        Normal      2                  Siti       23456        Normal      3                  Rone       78910        Normal      4                  Jean       56789        Normal      5                  Roby       28573        Normal      6                  Ali        78532        Normal  

Thank you very much for your attention. Edited : Here is my code for this program:

import java.io.IOException;  import java.nio.file.Files;  import java.nio.file.Paths;  import java.util.List;  import java.util.stream.Collectors;      public class FindCustomer {      public static void main(String[] args) throws IOException{          System.out.println ("Load customer from file");          java.util.Map<String, List<Customer>> customers =          Files.lines(Paths.get("customer.csv"))                  .map(line -> line.split(","))                  .map(field -> new Customer(                          Integer.parseInt(field[0]), field[1],                          Integer.parseInt(field[2]), field[3]))                  .collect(Collectors                          .groupingBy(Customer::getName));          System.out.println (customers);      }  

}

https://stackoverflow.com/questions/65582373/searching-data-from-arraylist January 06, 2021 at 12:03AM