Test2.java

import java.io.FileReader;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.HashMap;
import java.util.Scanner;

class User {
    private String name;
    private String email;
    private String phone;
    private int age;

    public User(String name,
                String email,
                String phone,
                int age) {
        this.name = name;
        this.email = email;
        this.phone = phone;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public String getEmail() {
        return email;
    }

    public String getPhone() {
        return phone;
    }

    public int getAge() {
        return age;
    }

    public String toString() {
        return String.format("%s|%s|%s|%d",
                        getName(),
                        getEmail(),
                        getPhone(),
                        getAge());
    }
}

public class Test2 {
    public static User createUser(String line) {
        String [] parts = line.split(" ");
        int age = Integer.valueOf(parts[3]);
        User user = new User(parts[0], parts[1], parts[2], age);
        return user;
    }

    public static void main(String...args) {
        String path = args[0];
        Map<String, User> map = new HashMap<>();

        try {
            FileReader fileReader = new FileReader(path);
            BufferedReader br = new BufferedReader(fileReader);
            
            String line = null;
            while ((line = br.readLine()) != null) {
                User user = createUser(line);
                map.put(user.getName(), user);
                System.out.println(user);
            }
            fileReader.close();
        } catch (FileNotFoundException e) {

        } catch (IOException e) {

        }

        Scanner sc = new Scanner(System.in);
        String name = sc.nextLine();
        User u1 = map.get(name);
        System.out.println(u1);

        for (Map.Entry<String, User> entry : map.entrySet()) {
            System.out.println("K : " + entry.getKey());
            System.out.println("V : " + entry.getValue());        
        }
    }
}