2020-04-10 08:58:06

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package KiemtraJava;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;


/**
 *
 * @author Administrator
 */
public class Main {

    public static void main(String[] args) {
        Map<String, Customer> customerHashMap = new HashMap<>();
        Scanner input = new Scanner(System.in);
        int choose;
        do {
            showMenu();
            choose = Integer.parseInt(input.nextLine());
            switch (choose) {
                case 1 :
                    System.out.println("N : ");
                    int n = Integer.parseInt(input.nextLine());
                    for (int i = 0; i < n; i++) {
                        Customer cus = new Customer();
                        cus.input();

                        customerHashMap.put(cus.getName(), cus);
                    }
                    break;     
                case 2: 
                    System.out.println("Enter the name to search");
                    String name = input.nextLine();
                    Customer customerFind = customerHashMap.get(name);
                    customerFind.display();
                    break;
                case 3 :
                    System.out.println("Thong tin sinh vien");
                    for (Map.Entry<String, Customer> entry : customerHashMap.entrySet()) {
                        Customer value = entry.getValue();
                        value.display();
                    }
                    break;     
                case 4 :
                    System.out.println("Exit");
                    break;
                default :
                    System.out.println("Error!!");
                    break;
            }

        } while (choose != 4);
    }

    static void showMenu() {
        System.out.println("Menu (Choose)");
        System.out.println("1. Add new customer");
        System.out.println("2. Find by name");
        System.out.println("3. Display all");
        System.out.println("4. Exit");
        System.out.println("Choose : ");
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package KiemtraJava;

import java.util.Scanner;

/**
 *
 * @author Administrator
 */
public class Customer {
    String name, email;
    int phone;

    public Customer() {
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getPhone() {
        return phone;
    }

    public void setPhone(int phone) {
        this.phone = phone;
    }
    public void input(){
        Scanner scan = new Scanner(System.in);
        System.out.println("Enter Name: ");
        name = scan.nextLine();
        System.out.println("Enter Email: ");
        email = scan.nextLine();
        System.out.println("Enter Phone: ");
        phone = Integer.parseInt(scan.nextLine());
    }
    public void display(){
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Customer{" + "name=" + name + ", email=" + email + ", phone=" + phone + '}';
    }
    
    
}

2020-04-10 08:57:26

package ADF2;

import java.util.HashMap;
import java.util.Scanner;

/**
 *
 * @author Anh Quan
 */
public class Main {

    public static void main(String[] args) {

        HashMap<Customer, String> Customer = new HashMap<>();
        Scanner scan = new Scanner(System.in);
        int choice;

        do {
            showMenu();
            choice = Integer.parseInt(scan.nextLine());

            switch (choice) {
                case 1:
                    Customer customer = new Customer();
                    customer.input();
                    Customer.put(customer, customer.getName());
                    break;

                case 2:
                    System.out.println("Enter name :");
                    String name ;
                    name = scan.nextLine();
                    
                    Customer.keySet().forEach((W) -> {
                        if(W.getName().equalsIgnoreCase(name))
                        {
                            W.display();
                        }
                        else 
                        {
                            System.out.println("N/A!");
                        }
            });
                    break;

                case 3:
                    Customer.keySet().forEach((W) -> {
                        W.display();
            });
                    break;

                case 4:
                    System.out.println("Exit.");
                    break;
                default:
                    System.out.println("!!!YOU PICK THE WRONG HOUSE FOOL!!!");
                    break;

            }
        } while (choice != 4);

    }

    public static void showMenu() {
        System.out.println("Menu :");
        System.out.println("1. Add a customer.");
        System.out.println("2. Find by name.");
        System.out.println("3. Display all.");
        System.out.println("4. Exit.");
    }
}

package ADF2;

import java.util.Scanner;

/**
 *
 * @author Anh Quan
 */
public class Customer {

    String name, email, phone_Number;

    public Customer() {

    }

    public Customer(String name, String email, String phonenumer) {
        this.name = name;
        this.email = email;
        this.phone_Number = phone_Number;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPhonenumber() {
        return phone_Number;
    }

    public void setPhonenumber(String phonenumer) {
        this.phone_Number = phonenumer;
    }

    public void input() {
        Scanner scan = new Scanner(System.in);

        System.out.println("Enter name: ");
        name = scan.nextLine();

        System.out.println("Enter email: ");
        email = scan.nextLine();

        System.out.println("Enter phone number: ");
        phone_Number = scan.nextLine();
    }

    public void display() {
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Customer{" + "name = " + name + ", email = " + email + ", phonenumber = " + phone_Number + '}';
    }

}

2020-04-10 08:57:04

package java2_Advanced.KiemTra_Java2;

import java.util.Scanner;

public class Customer {
    String name, email;
    int phone;

    public Customer() {
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getPhone() {
        return phone;
    }

    public void setPhone(int phone) {
        this.phone = phone;
    }

    public void input() {
        Scanner scan = new Scanner(System.in);
        System.out.println("Enter name: ");
        name = scan.nextLine();
        System.out.println("Enter email: ");
        email = scan.nextLine();
        System.out.println("Enter phone: ");
        phone = Integer.parseInt(scan.nextLine());
    }

    public void display() {
        System.out.println("Name: " + name);
        System.out.println("Email: " + email);
        System.out.println("Phone: " + phone);
        System.out.println("");
    }


}

package java2_Advanced.KiemTra_Java2;


import java.util.HashMap;
import java.util.Scanner;

public class CustomerRelationshipManagement {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        HashMap<String, Customer> ma = new HashMap<>();
        int choose;
        do {
            showMenu();
            System.out.println("Enter choose: ");
            choose = Integer.parseInt(scan.nextLine());
            switch (choose) {
                case 1:
                    Customer cus = new Customer();
                    cus.input();
                    ma.put(cus.getName(), cus);
                    break;
                case 2:
                    System.out.println("Enter the name to search: ");
                    String name = scan.nextLine();
                    for (String s : ma.keySet()) {
                        if (ma.get(s).name.equalsIgnoreCase(name)) {
                            ma.get(name).display();
                        } else {
                            System.out.println("No customer found");
                        }
                    }
                    break;
                case 3:
                    for (String s : ma.keySet()) {
                        Customer customer = ma.get(s);
                        customer.display();
                    }
                    break;
                case 4:
                    System.out.println("Exit");
                    break;
                default:
                    System.err.println("error");
                    break;
            }

        } while (choose != 4);
    }

    public static void showMenu() {
        System.out.println("1. Add new customer");
        System.out.println("2. Find by name");
        System.out.println("3. Display all");
        System.out.println("4. Exit");
    }

}

2020-04-10 08:56:52

Customer:

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ThiJava2;

import java.util.Scanner;

/**
 *
 * @author lemin
 */
public class Customer {
    String name, email, phone;

    public Customer() {
    }

    public Customer(String name, String email, String phone) {
        this.name = name;
        this.email = email;
        this.phone = phone;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }
    
    public void input(){
        Scanner input = new Scanner(System.in);
        System.out.print("Nhập tên:");
        name = input.nextLine();
        
        System.out.print("Nhập Email:");
        email = input.nextLine();
        
        System.out.print("Nhập Phone:");
        phone = input.nextLine();
        
    }
    
    public void display() {
        System.out.println("Tên: " + name);
        System.out.println("Email: " + email);
        System.out.println("Phone: " + phone);
        System.out.println("======================");
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ThiJava2;

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

/**
 *
 * @author lemin
 */
public class Main {
    public static void main(String[] args) {
        Map<String, Customer> cusHashMap = new HashMap<>();
        
        Scanner input = new Scanner(System.in);
        int choose;
        
        do {
            showMenu();
            choose = Integer.parseInt(input.nextLine());
            
            switch(choose) {
                case 1:
                    System.out.println("How many customers you want to add?: ");
                    int n = Integer.parseInt(input.nextLine());
                    for (int i = 0; i < n; i++) {
                        Customer cus = new Customer();
                        cus.input();
                        
                        cusHashMap.put(cus.getName(), cus);
                    }
                    break;
                case 2:
                    System.out.println("Insert name by search: ");
                    String name = input.nextLine(); 
                    cusHashMap.keySet().forEach((str) -> {
                        if(cusHashMap.get(str).name.equalsIgnoreCase(name)) {
                            cusHashMap.get(str).display();
                        } else {
                            System.out.println("Not found!");
                        }
                    }); 
                    break;
                    
                case 3:
                    System.out.println("Display All:");
                    cusHashMap.keySet().stream().map((str) -> cusHashMap.get(str)).forEachOrdered((cus) -> {
                        cus.display();
            }); 
                    break;
                case 4:
                    System.out.println("Exit!!!");
                    break;
            }
        } while(choose != 4);
    }
    
    static void showMenu() {
        System.out.println("1. Add new customer");
        System.out.println("2. Find by name");
        System.out.println("3. Display all");
        System.out.println("4. Exit");
        System.out.print("Choose: ");
    }
}

2020-04-10 08:54:31

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package java2EX;

import java.util.Scanner;

/**
 *
 * @author Administrator
 */
public class customer {
    String name, email;
    int phone;

    public customer() {
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getPhone() {
        return phone;
    }

    public void setPhone(int phone) {
        this.phone = phone;
    }
    
    public void input(){
        Scanner scan = new Scanner(System.in);
        System.out.println("Nhap ten :");
        name = scan.nextLine();
        System.out.println("Nhap email :");
        email = scan.nextLine();
        System.out.println("Nhap so dien thoai :");
        phone = Integer.parseInt(scan.nextLine());
    }
    public void display(){
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "customer{" + "name=" + name + ", email=" + email + ", phone=" + phone + '}';
    }
    
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package java2EX;

import java.util.HashMap;
import java.util.Scanner;

/**
 *
 * @author Administrator
 */
public class main {
    public static void main(String[] args) {
        HashMap<String, customer> hashMap = new HashMap();
        Scanner scan = new Scanner(System.in);
        int choose, n;
        
        do{
            showMenu();
            choose = Integer.parseInt(scan.nextLine());
            
            switch(choose){
                case 1:
                    System.out.println("Add new customer");
                    customer cus = new customer();
                    cus.input();
                    hashMap.put(cus.getName(),cus);
                    break;
                case 2:
                    System.out.println("Find by name");
                    String name = scan.nextLine();
                    for (String str : hashMap.keySet()) {
                        if(hashMap.get(str).name.equalsIgnoreCase(name)){
                            hashMap.get(str).display();
                        }
                    }
                    break;
                case 3:
                    System.out.println("Display all");
                    for (String str : hashMap.keySet()) {
                        customer cuss = hashMap.get(str);
                        cuss.display();
                    }
                    break;
                case 4:
                    System.out.println("Exit!!!");
                    break;
                default:
                    System.out.println("Input fail!!!");
                    break;
            }
        }while(choose != 4);
    }
    public static void showMenu(){
        System.out.println("1. Add new customer");
        System.out.println("2. Find by name");
        System.out.println("3. Display all");
        System.out.println("4. Exit");
        System.out.println("Choose :");
    } 
}

2020-04-10 08:53:51

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ExamII;

import java.util.HashMap;
import java.util.Scanner;

/**
 *
 * @author Admin
 */
public class Main {

    public static void main(String[] args) {

        HashMap<Customer, String> Customer = new HashMap<>();
        Scanner scan = new Scanner(System.in);
        int choice;

        do {
            showMenu();
            choice = Integer.parseInt(scan.nextLine());

            switch (choice) {
                case 1:
                    Customer customer = new Customer();
                    customer.input();
                    Customer.put(customer, customer.getName());
                    break;

                case 2:
                    System.out.println("Enter name :");
                    String name ;
                    name = scan.nextLine();
                    
                    Customer.keySet().forEach((W) -> {
                        if(W.getName().equalsIgnoreCase(name))
                        {
                            W.display();
                        }
                        else 
                        {
                            System.out.println("N/A!");
                        }
            });
                    break;

                case 3:
                    Customer.keySet().forEach((W) -> {
                        W.display();
            });
                    break;

                case 4:
                    System.out.println("Exit.");
                    break;
                default:
                    System.out.println("!!!YOU PICK THE WRONG HOUSE FOOL!!!");
                    break;

            }
        } while (choice != 4);

    }

    public static void showMenu() {
        System.out.println("Menu :");
        System.out.println("1. Add a customer.");
        System.out.println("2. Find by name.");
        System.out.println("3. Display all.");
        System.out.println("4. Exit.");
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ExamII;

import java.util.Scanner;

/**
 *
 * @author Admin
 */
public class Customer {

    String name, email, phone_Number;

    public Customer() {

    }

    public Customer(String name, String email, String phonenumer) {
        this.name = name;
        this.email = email;
        this.phone_Number = phone_Number;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPhonenumber() {
        return phone_Number;
    }

    public void setPhonenumber(String phonenumer) {
        this.phone_Number = phonenumer;
    }

    public void input() {
        Scanner scan = new Scanner(System.in);

        System.out.println("Enter name: ");
        name = scan.nextLine();

        System.out.println("Enter email: ");
        email = scan.nextLine();

        System.out.println("Enter phone number: ");
        phone_Number = scan.nextLine();
    }

    public void display() {
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Customer{" + "name = " + name + ", email = " + email + ", phonenumber = " + phone_Number + '}';
    }

}

2020-04-10 08:51:42

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package QLkhachhang;
import java.util.*;

/**
 *
 * @author ASUS
 */
public class Main {
    
    public static void main(String[] args) {
        HashMap<String,khachhang> khackMap=new HashMap<>();
        khachhang hangt=new khachhang();
        Scanner scan=new Scanner(System.in);
        int choise,n;
        do {  
            menu();
            choise=Integer.parseInt(scan.nextLine());
            switch(choise){
                case 1:
                    System.out.println("nhap so khach hang");
                    for (int i = 0; i < 10; i++) {
                        khachhang thao = new khachhang();
                        thao.input();
                        khackMap.put(thao.getName(), thao);
                    }
                    break;
                case 2:
                    System.out.println("nhap sdt kh can tim:");
                    int phone=Integer.parseInt(scan.nextLine());
                    if(phone==hangt.getPhone()){
                    khachhang thaobeou = khackMap.get(phone);
                    thaobeou.display();
                    } else{
                        System.out.println("so dien thoai ko phu hop>>..");
                    }
                    break;
                case 3:
                    System.out.println("thong tin khach hang");
                    for (Map.Entry<String,khachhang> entry:khackMap.entrySet()) {
                        khachhang hang=entry.getValue();
                        hang.display();
                    }
                    break;
                case 4:
                    System.out.println("Exit>>>");
                    break;
                default:
                    break;
            }
        } while (choise!=4);
    }
    static void menu(){
        System.out.println("1.them khach hang:");
        System.out.println("2.tim theo ten");
        System.out.println("3.hien thi tat ca");
        System.out.println("4.exit");
    }
}
///////
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package QLkhachhang;

import java.util.Scanner;

/**
 *
 * @author ASUS
 */
public class khachhang {
     String name,email;
    int phone;

    public khachhang() {
    }

    public khachhang(String name, String email, int phone) {
        this.name = name;
        this.email = email;
        this.phone = phone;
    }
    public void display(){
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "Main{" + "name=" + name + ", email=" + email + ", phone=" + phone + '}';
    }
    public void input(){
        Scanner scan=new Scanner(System.in);
        System.out.println("nhap ten");
        name=scan.nextLine();
        System.out.println("nhap email");
        email=scan.nextLine();
        System.out.println("nhap so dien thoai");
        phone=Integer.parseInt(scan.nextLine());
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getPhone() {
        return phone;
    }

    public void setPhone(int phone) {
        this.phone = phone;
    }
    
}

2020-04-10 08:51:25

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package H.exam;

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

/**
 *
 * @author HAI
 */
public class main {
    public static void main(String[] args) {
        Map<String, customer> cusHashMap = new HashMap<>();
        Scanner scan = new Scanner(System.in);
        int c;
        do {            
            menu();
            c= Integer.parseInt(scan.nextLine());
            switch(c){
                case 1:
                    System.out.println("Nhap ten khach hang can tim kiem: ");
                    String fullname = scan.nextLine();
                    for (Map.Entry<String, customer> entry : cusHashMap.entrySet()) {
                        customer cusFind = cusHashMap.get(fullname);
                    cusFind.display();
                    }
                    
                    break;
                case 2:
                    System.out.println("Thong tin khach hang");
                    for (Map.Entry<String, customer> entry : cusHashMap.entrySet()) {
                        customer value = entry.getValue();
                        value.display();
                    }
                    break;
                case 3:
                    System.out.println("Nhap N: ");
                    int n = Integer.parseInt(scan.nextLine());
                    for (int i = 0; i < n; i++) {
                        customer cus = new customer();
                        cus.input();
                        cusHashMap.put(cus.getName(), cus);
                    }
                    break;
                case 4:
                default:    
                    break;
                
            }
        } while (c!=4);
        
        
        
        
    }
    public static void menu(){
        System.out.println("1.Search Customer.");
        System.out.println("2.Show all Customer.");
        System.out.println("3.Add Customer.");
        System.out.println("4.end.");
        System.out.println("Choose : ");
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package H.exam;

import java.util.Scanner;

/**
 *
 * @author HAI
 */
public class customer {
    String name , email ;
    long phone;
    public customer() {
    }

    public customer(String name, String email, long phone) {
        this.name = name;
        this.email = email;
        this.phone = phone;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public long getPhone() {
        return phone;
    }

    public void setPhone(long phone) {
        this.phone = phone;
    }
    public void input(){
        Scanner scan = new Scanner(System.in);
        System.out.println("enter name : ");
        name = scan.nextLine();
        while (true) {            
            System.out.println("enter email : ");
            email= scan.nextLine();
            if (email.contains("@") && !email.contains(" ")) {
                break;
            }else{
                System.err.println("email --> '@' && !''");
            }
        }
        System.out.println("enter Phone number : ");
        phone = Long.parseLong(scan.nextLine());
    }
    public void display(){
        System.out.println("Customer's name : "+name);
        System.out.println("Customer's Email : "+email);
        System.out.println("Customer's Telephone Number : "+phone);
    }
    
}

2020-04-10 08:49:28

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package BaiThiThucHanh;

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

/**
 *
 * @author Admin
 */
public class Main {

    public static void main(String[] args) {
        Map<String, Customer> customerHashMap = new HashMap<>();
        Scanner input = new Scanner(System.in);
        int choose;
        do {
            showMenu();
            choose = Integer.parseInt(input.nextLine());
            switch (choose) {
                case 1 :
                    System.out.println("N : ");
                    int n = Integer.parseInt(input.nextLine());
                    for (int i = 0; i < n; i++) {
                        Customer cus = new Customer();
                        cus.input();

                        customerHashMap.put(cus.getName(), cus);
                    }
                    break;     
                case 2: 
                    System.out.println("Enter the name to search");
                    String name = input.nextLine();
                    Customer cusFind = customerHashMap.get(name);
                    cusFind.display();
                    break;
                case 3 :
                    System.out.println("Thong tin sinh vien");
                    for (Map.Entry<String, Customer> entry : customerHashMap.entrySet()) {
                        Customer value = entry.getValue();
                        value.display();
                    }
                    break;     
                case 4 :
                    System.out.println("Exittt");
                    break;
                default :
                    System.out.println("Error!!!");
                    break;
            }

        } while (choose != 4);
    }

    static void showMenu() {
        System.out.println("Menu (Choose)");
        System.out.println("1. Add new customer");
        System.out.println("2. Find by name");
        System.out.println("3. Display all");
        System.out.println("4. Exit");
        System.out.println("Choose : ");
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package BaiThiThucHanh;

import java.util.Scanner;

/**
 *
 * @author Admin
 */
public class Customer {
    String name , email;
    int number;

    public Customer() {
    }

    public Customer(String name, String email, int number) {
        this.name = name;
        this.email = email;
        this.number = number;
    }

   
    public void input (){
        Scanner scan = new Scanner(System.in);
        System.out.println("Add Name : ");
        name = scan.nextLine();
        System.out.println("Add Email : ");
        email = scan.nextLine();
        System.out.println("Add Phone Number :");
        number = Integer.parseInt(scan.nextLine());
    
}

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getNumber() {
        return number;
    }

    public void setNumber(int number) {
        this.number = number;
    }

    @Override
    public String toString() {
        return "Customer{" + "name=" + name + ", email=" + email + ", number=" + number + '}';
    }
    public void display(){
        System.out.println(toString());
        //System.out.println("this");
    }
}

2020-04-10 08:49:11

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package examination_java2;

import java.util.HashMap;
import java.util.Scanner;

/**
 *
 * @author admin
 */
public class Main {
    public static void main(String[] args) {
        
        Scanner input = new Scanner(System.in);
        int c;
        
        HashMap<Customer,String> Customer = new HashMap<Customer,String>();
        
        do {
            ShowMenu();
            c = Integer.parseInt(input.nextLine());
            switch(c){
                case 1:
                    Customer cus = new Customer();
                    cus.input();
                    Customer.put(cus, cus.getName());
                    break;
                case 2:
                    System.out.println("Search a name:");
                    String Name = input.nextLine();
                    for (Customer i : Customer.keySet()) {
                        if (i.getName().equalsIgnoreCase(Name))
                            i.output();
                    }
                    break;
                case 3:
                    for (Customer i : Customer.keySet()) {
                        i.output();
                    }
                    break;
                case 4:
                    System.out.println("Exit!");
                    break;
                default:
                    System.err.println("ERROR!");
            }
        }while(c != 4);
        
    }
    public static void ShowMenu(){
            System.out.println("=====================");
            System.out.println("Menu");
            System.out.println("1. Add new customer");
            System.out.println("2. Find by name");
            System.out.println("3. Display all");
            System.out.println("4. Exit");
            System.out.print("Enter: ");
        }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package examination_java2;

import java.util.Scanner;

/**
 *
 * @author admin
 */
public class Customer {

    String Name, Email;
    int Phone;

    public Customer() {
    }

    public Customer(String Name, String Email, int Phone) {
        this.Name = Name;
        this.Email = Email;
        this.Phone = Phone;
    }

    public String getName() {
        return Name;
    }

    public void setName(String Name) {
        this.Name = Name;
    }

    public String getEmail() {
        return Email;
    }

    public void setEmail(String Email) {
        this.Email = Email;
    }

    public int getPhone() {
        return Phone;
    }

    public void setPhone(int Phone) {
        this.Phone = Phone;
    }

    @Override
    public String toString() {
        return "Customer{" + "Name=" + Name + ", Email=" + Email + ", Phone=" + Phone + '}';
    }
     public void input(){
         Scanner input = new Scanner(System.in);
         System.out.println("------------------");
         System.out.println("Enter a name:");
         Name = input.nextLine();
         
         System.out.println("Enter a phone:");
         Phone = Integer.parseInt(input.nextLine());
         
         System.out.println("Enter a email:");
         Email = input.nextLine();
    }
    public void output(){
        System.out.println(toString());
    }
    
}