Delete and SearchByEmail methods not working

Delete and SearchByEmail methods not working - java

Hey my Delete and SearchByEmail methods are not working. Delete basically asks all the right questions but does not delete the Employee the user chooses. SearchByEmail returns all of the employees rather than the one the user has asked for.
Here is my code:
MainApp
//Imports.
import java.util.Scanner;
//********************************************************************
public class MainApp
{
//The Scanner is declared here for use throughout the whole MainApp.
private static Scanner keyboard = new Scanner(System.in);
public static void main(String[] args)
{
new MainApp().start();
}
public void start()
{
//Create a Store named Store and add Employee's to the Store.
EmployeeStore Store = new EmployeeStore();
Store.add(new Employee ("James O' Carroll", 18,"hotmail.com"));
Store.add(new Employee ("Andy Carroll", 1171,"yahoo.com"));
Store.add(new Employee ("Luis Suarez", 7,"gmail.com"));
//********************************************************************
..............................
case 3:
System.out.println("Delete");
Employee employeeDelete = MenuMethods.userInputByName();
Store.searchByName(employeeDelete.getEmployeeName());
Store.remove(employeeDelete);
break;
case 4:
System.out.println("Delete All");
Store.clear();
break;
case 5:
System.out.println("Edit");
Employee employeeEdit = MenuMethods.userInputByName();
Store.searchByName(employeeEdit.getEmployeeName());
if (employeeEdit != null)
{
employeeEdit.setEmployeeName("Joe");
employeeEdit.setEmployeeId(1);
employeeEdit.setEmployeeEmail("webmail.com");
Store.edit(employeeEdit);
}
break;
case 6:
int searchChoice;
searchChoice =MenuMethods.getMenuChoice("1.Search by Name.\n2.Search by Email.", 2, "Please enter your choice:", "Error [1,2] Only");
String temp = keyboard.nextLine();
System.out.println("Search");
switch (searchChoice) {
case 1:
System.out.println("Search by Name.");
Employee employeeSearchName = MenuMethods.userInputByName();
Store.searchByName(employeeSearchName.getEmployeeName());
break;
case 2:
System.out.println("Search by Email.");
Employee employeeSearchEmail = MenuMethods.userInputByEmail();
Store.searchByEmail(employeeSearchEmail.getEmployeeEmail());
break;
//Test Code.
/*System.out.println("Search");
Employee employee1 = MenuMethods.userInputByName();
Employee foundEmployee = Store.searchByName(employee1.getEmployeeName());
if (foundEmployee != null) {
System.out.println("Found employee!");
} else {
System.out.println("Not Found!");
}*/
}
break;
case 7:
System.out.println("Print");
Store.print();
break;
case 8:
System.out.println("Exit");
break;
}
} while (choice != 8);
}
}
MenuMethods
//Imports
import java.util.Scanner;
//********************************************************************
public class MenuMethods
{
private static Scanner keyboard = new Scanner(System.in);
..............................
public static Employee userInput()
{
String temp = keyboard.nextLine();
Employee e = null;
System.out.println("Please enter the Employee Name:");
String employeeName = keyboard.nextLine();
System.out.println("Please enter the Employee ID:");
int employeeId = keyboard.nextInt();
temp = keyboard.nextLine();
System.out.println("Please enter the Employee E-mail address:");
String employeeEmail = keyboard.nextLine();
return e = new Employee(employeeName , employeeId, employeeEmail);
}
//********************************************************************
public static Employee userInputByName()
{
//String temp is for some reason needed. If it is not included
//The code will not execute properly.
String temp = keyboard.nextLine();
Employee e = null;
System.out.println("Please enter the Employee Name:");
String employeeName = keyboard.nextLine();
return e = new Employee(employeeName);
}
//********************************************************************
public static Employee userInputByEmail()
{
//String temp is for some reason needed. If it is not included
//The code will not execute properly.
String temp = keyboard.nextLine();
Employee e = null;
System.out.println("Please enter the Employee Email:");
String employeeEmail = keyboard.nextLine();
//This can use the employeeName's constructor because java accepts the parameters instead
//of the name's.
return e = new Employee(employeeEmail);
}
//********************************************************************
}
EmployeeStore
//Imports.
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
//********************************************************************
public class EmployeeStore implements Serializable
{
HashMap<String, Employee> map;
private static Scanner keyboard = new Scanner(System.in);
//Constructor.
public EmployeeStore()
{
map = new HashMap<String,Employee>();
}
//********************************************************************
//Hashmap Methods.
//Add to the Hashmap : Employee.
public void add(Employee employee)
{
map.put(employee.getEmployeeName(), employee);
}
//********************************************************************
//Remove from the Hashmap : Employee.
public Employee remove(Employee key)
{
//Remove the Employee by name.
if(map.containsKey(key))
return map.remove(key); //if its there remove and return
else
return null; //if its not there return 0x00000000 address
}
//********************************************************************
//Clear the Hashmap : Employee.
public void clear()
{
map.clear();
}
//********************************************************************
//Print the Hashmap : Employee.
public void print()
{
System.out.println("\n********Employee's in the Company.********");
for (Employee employee : map.values())
{
//System.out.println(employee); to print the toString of Employee class
//or:
System.out.println("Employee Name:\t" + employee.getEmployeeName());
System.out.println("Employee Id:\t" + employee.getEmployeeId());
System.out.println("E-mail:\t"+ employee.getEmployeeEmail());
}
}
public Employee get(String name){
return map.get(name);
}
/*public void searchByName ()
{
//(for(Employee e : map.values()) {...})
//and check for each employee if his/her email matches the searched value
for(Employee e : map.values())
{
System.out.println(e);
map.equals(getClass());
}
}*/
//********************************************************************
public Employee searchByName(String employeeName)
{
Employee employee = map.get(employeeName);
System.out.println(employee);
return employee;
}
//********************************************************************
Employee findByEmail(String email) {
for (Employee employee : map.values())
if (employee.getEmployeeEmail().equals(email))
return employee;
// Not found.
return null;
}
public boolean searchByEmail(String employeeEmail) {
boolean employee = findByEmail(employeeEmail) != null;
System.out.println(employee);
return employee;
}
/*public void searchByName ()
{
//(for(Employee e : map.values()) {...})
//and check for each employee if his/her email matches the searched value
for(Employee e : map.values())
{
System.out.println(e);
map.equals(getClass());
System.out.println(e);
map.equals(employee.getEmployeeEmail());
}
}*/
//********************************************************************
public void edit(Employee employee)
{
map.put(employee.getEmployeeName(), employee);
}
//********************************************************************
public EmployeeStore copy()
{
//instanciate the destination copy and give same name
EmployeeStore Copy = new EmployeeStore();
//by specifying the type of the entry in the for loop i.e. <>
// we don't have to typecast the getKey() and getValue() methods
//as shown in the commented out line inside the for loop
for(Map.Entry<String, Employee> entry : map.entrySet())
{
//getting each key-value and putting into the copy
//theCopy.add((MovieKey)entry.getKey(), (Movie)entry.getValue());
Copy.add(entry.getValue());
}
//return address of the new MovieStore object
return Copy;
}
//********************************************************************
//********************************************************************
//********************************************************************
}
Employee
//Imports:
//********************************************************************
//Employee Class.
public class Employee
{
//Variables.
private String employeeName;
private int employeeId;
private String employeeEmail;
//********************************************************************
//Constructors.
public Employee(String employeeName, int employeeId, String employeeEmail)
{
this.employeeName = employeeName;
this.employeeId = employeeId;
this.employeeEmail = employeeEmail;
}
//Overloading the constructor for the use with userInputByName method.
public Employee(String employeeName)
{
this.employeeName = employeeName;
}
//********************************************************************
//Getters.
public String getEmployeeEmail()
{
return employeeEmail;
}
public String getEmployeeName()
{
return employeeName;
}
public int getEmployeeId()
{
return employeeId;
}
//********************************************************************
//Setters.
public void setEmployeeEmail(String employeeEmail)
{
this.employeeEmail = employeeEmail;
}
public void setEmployeeName(String employeeName)
{
this.employeeName = employeeName;
}
public void setEmployeeId(int employeeId)
{
this.employeeId = employeeId;
}
//********************************************************************
//toString method.
public String toString()
{
return "\t\t\tEmployee\n" +
"********************************************************************\n"+
"Employee Name: "+ employeeName +"\n"+
"Employee Id: " + employeeId +"\n"+
"Employee Email: " + employeeEmail;
}
//********************************************************************
}

If you have provided your Employee class it should be more clear, anyways.
The problem has to be the following:
return e = new Employee(employeeEmail);
So it is about your Employee Constructor which is defined for employeeName but you initialize employee object with employeeEmail. Therefore, it assigns email as a name..
Just return the search phrase as a String don't create new Employee objects for searches or other operations.
Without destructing your structure, I would suggest you to add another constructor to Employee class
public Employee(String employeeName,String employeeEmail)
{
this.employeeName = employeeName;
this.employeeEmail = employeeEmail;
}
and
public static Employee userInputByEmail()
{
...
...
return e = new Employee(null,employeeEmail);
}

You appear to be using
Employee(String employeeName)
in 2 different ways:
return e = new Employee(employeeName);
and
return e = new Employee(employeeEmail);
The field should be one or the other. Perhaps just create Employee() and use setEmployeeEmail.

Related

Circular Queue in Java

I am implemeting a circular queue in java which will accept objects (Employee) as entries. Now I have a method to edit the surname of the specific object, but somehow I cannot access the surname setter method found in the Employee class from the CQueue class even though I am importing all the required packages. Here is the code:
//PACKAGES IMPORTED
package linearstructures;
import dataobjects.*;
import linearnodes.*;
public class CQueue{
Node front, rear, temp;
boolean full = false;
String key;
public AnyClass searchKey(String key)
{
temp = rear.next; // first node
do
{
if (temp.obj.getKey().equals(key))
return temp.obj;
temp = temp.next;
} while (temp != rear.next);
return null;
}
public AnyClass editObject(String key){
int choice, newSeqNo;
double newPay;
boolean exit = false;
Employee etemp = new Employee(); //INCLUDED THIS AFTER EDIT
searchKey(key);
if(searchKey(key) != null){
temp.obj.getData();
System.out.println();
System.out.println("------------------------");
System.out.print("Enter new Salary: ");
newPay = sc.nextDouble();
System.out.println("------------------------");
System.out.println();
etemp.setPay(newPay); //INCLUDED THIS AFTER EDIT
else
System.out.println("NO OBJECT WAS FOUND!");
return null;
}
}
Employee class:
package dataobjects;
public class Employee extends AnyClass
{
public String surname;
public double pay;
public Employee(){}
public Employee(int seqNo, String surname, double pay)
{
super(seqNo);
this.surname = surname;
this.pay = pay;
}
public double getSalary()
{
return pay;
}
public void setPay(double newPay)
{
pay = newPay;
}
public String getData()
{
return super.getData() + ", Surname: " + surname + ", Pay: " + pay;
}
public String getKey()
{
return surname;
}
}
AnyClass class:
package dataobjects;
public class AnyClass
{
public int seqNo;
public AnyClass(){}
public AnyClass(int seqNo)
{
this.seqNo = seqNo;
}
public int getseqNo()
{
return seqNo;
}
public void setseqNo(int seqNo) {
this.seqNo = seqNo;
}
public String getData()
{
return "Sequential Number - " + seqNo;
}
public String getKey()
{
return Integer.toString(seqNo);
}
public void edit(){}
}
Node Class
package linearnodes;
import dataobjects.*;
public class Node{
public AnyClass obj;
public Node next;
public Node(AnyClass obj){
next = null;
this.obj = obj;
}
}

Your editobject method could be something like this:
public AnyClass editObject(String key){
// ...
// Store your search result to avoid performing searchKey twice
AnyClass searchResult = searchKey(key);
if( searchResult != null ){
// Check if searchResult is an Employee object
if( searchResult instanceof Employee )
// Cast AnyClass to Employee
Employee empl = (Employee) searchResult;
// Your logic here...
// Set properties of the Employee object
empl.setPay(newPay);
// ...
return empl;
}
// Add 'else if' here, if you need to manage other Object types
// otherwise you can join previous if conditions
}
else
System.out.println("NO OBJECT WAS FOUND!");
return null;
}
Your code creates a new local Employee instance that dies when the method ends, its value will be lost because no object points to it.

for include pay "etemp.setPay(newPay);" you will change return object to Employee.
public Employee editObject(String key){
Employee etemp = new Employee(); //INCLUDED THIS AFTER EDIT
....
....
etemp.setPay(newPay); //INCLUDED THIS AFTER EDIT
return etemp;
}
because AnyClass hasn't "public double pay;"

Please find how to enter employee details,update,remove,displaying using hashmap

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
class Employee
{
private String Id;
private String Name;
private String Department;
private String Salary;
public Employee(String Id, String Name, String Department,
String Salary)
{
this.Id=Id;
this.Name=Name;
this.Department=Department;
this.Salary=Salary;
}
public String getId() {
return Id;
}
public void setId(String id) {
Id = id;
}
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
public String getDepartment() {
return Department;
}
public void setDepartment(String department) {
Department = department;
}
public String getSalary() {
return Salary;
}
public void setSalary(String salary) {
Salary = salary;
}
public String toString()
{
return this.Id+"\t"+this.Name+"\t\t"+this.Department+"\t\t\t"+this.Salary;
}
}
public class Assignment4
{
public static void main(String[] args)
{
try {
Map< String, List<Employee> > m=new HashMap< String, List<Employee> >();
List<Employee> ListForFinance=new ArrayList<Employee>();
Scanner scn1=new Scanner(System.in);
String Id;
String Name;
String Department;
String Salary;
while(true)
{
System.out.print("\nThe Choices:\n1>add\n2>modification\n3>remove\n4>display\n\n");
System.out.println("Enter the choice: ");
System.out.println("To quit type -1");
int num=scn1.nextInt();
if(num == -1)
{
break;
}
switch(num)
{
case 1:
{
System.out.print("\nDepartment: ");
Department=scn1.next();
System.out.print("\nId: ";
Id=scn1.next();
System.out.print("\nName: ");
Name=scn1.next();
System.out.print("\nSalary: ");
Salary=scn1.next();
Employee employee1=new Employee(Id,Name,Department,Salary);
ListForFinance.add(employee1);
m.put(Department, ListForFinance);
break;
}
case 2:
{
System.out.println("Type Department to be modified");
Department=scn1.next();
System.out.println("Modification values");
System.out.print("\nId: ");
Id=scn1.next();
System.out.print("\nName: ");
Name=scn1.next();
System.out.print("\nSalary: ";
Salary=scn1.next();
Set<String> s=m.keySet();
Iterator<String> i=s.iterator();
Employee employee1=new Employee(Id,Name,Department,Salary);
m.get(Department.setId("Id");
ListForFinance.add(employee1);
m.put(Department, ListForFinance);
while(i.hasNext())
{
System.out.println(i.next());
}
break;
}
case 3:
{
System.out.println("=========================================================");
System.out.println("ID"+"\t"+"NAME"+"\t\t"+"DEPARTMENT"+"\t\t"+"SALARY");
System.out.println("=========================================================");
Set<String> s=m.keySet();
Iterator<String> i=s.iterator();
while(i.hasNext())
{
String dept=i.next();
List<Employee> employees=m.get(dept);
for(int j=0;j<employees.size();j++)
{
System.out.print("\n"+employees.get(j)+"\n\n");
}
}
break;
}
}
}
}
catch(Exception e)
{
System.out.println("NOTE: \n"+"Please enter specified key format..!!!");
System.out.println("======================================");
System.out.println("Now you are Signing out");
System.out.println("Thank You,Login Again");
System.out.println("======================================");
}
}
}
default:
System.out.println("=============================================================";
System.out.print("Wrong key Pressed,please enter the correct key\n";
System.out.println("Try again...!!!";
System.out.println("=============================================================";
}
}
}
Please find how to enter employee details,update,remove,displaying using hashmap wherin employee dept is taken as a key and id,name,salary is stored in the values using arraylist ......Currently Iam struck at CASE 2...PLease help me out
In CASE 1 i am trying to insert the employee details and in CASE 2 iam trying to modify the values .If i try to put any details with the same Dept it should create new entry...Even i should able to modify it,i am not getting how to do..PLease help me out

Your question is not clear,
For setting employee in list
Arraylist<Employee> list = new ArrayList<Employees>;
Employee emp = new Employee();
emp.setname("John");
emp.setEmpCode(1);
list.add(emp);
For getting employee from list just use this.
Employee emp = list.getItem(0);// change 0 to your position or make a loop to get all employees

import java.util.*; import java.util.concurrent.TimeUnit;
class Employee{
public String name; public String city; public String email; public String phone; public String age;`enter code here`
public Employee(String name,String city,String email,String age,String phone) { super(); this.name = name; this.city=city; this.email = email; this.age=age; this.phone = phone; }
public String getPhone() { return phone; }
public String getAge() { return age; }
public String getName() { return name; } public String getEmail() { return email; } public String getAddress() { return city; } public void setPhone(String phone) { this.phone = phone; } }
public class Display_Employee implements Comparator {
/* public int compare(Employee o1, Employee o2) { // in the case if when age is Integer return o1.getAge() - o2.getAge(); }*/ /public int compare(Employee o1, Employee o2) { //for short by Name return o1.getFirstName().compareTo(o2.getFirstName()); }/ public int compare(Employee o1, Employee o2) { //for short by Name return o1.getAge().compareTo(o2.getAge()); } public static void main(String[] args) throws Exception { int choice,i,size,mob_serch_result,email_serch_result; String name,city,email,phone,age,mob_serch,email_serch,update_search,choice_update,update_search_email; String name1,city1,email1,phone1,age1;
Scanner sc = new Scanner(System.in);
// Map< String, List > mapPhone=new HashMap< String, List >(); // Map< String, List > mapEmail=new HashMap< String, List >(); Map< String, Integer > mapEmail=new HashMap< String, Integer >(); Map< String, Integer > mapPhone=new HashMap< String, Integer >(); List list = new ArrayList(); //User Input /*System.out.println("How much details you want to Enter"); size=sc.nextInt() ; for(i=0;i<size;i++) {
System.out.println("\t\t\t\tEnter the "+(i+1)+" Employee Details \t\t\t\t\n"); System.out.println("Enter the name "); name=sc.next(); System.out.println("Enter the City "); city=sc.next(); System.out.println("Enter the email "); email=sc.next(); System.out.println("Enter the age "); age=sc.next(); System.out.println("Enter the MobNum "); phone=sc.next(); Employee employee=new Employee(name,city,email,age,phone); list.add(employee); mapPhone.put(phone,i); mapEmail.put(email,i); }*/
//Testing input Employee employee1=new Employee("Raj","Mumbai","raj#yahoo.com","27","7499031600"); list.add(employee1); phone="7499031600"; email="raj#yahoo.com"; mapPhone.put(phone,0); mapEmail.put(email,0); Employee employee2=new Employee("Rekha","Chennai","rekha#hotmail.com","24","9598551664"); list.add(employee2); phone1="9598551664"; email1="rekha#hotmail.com"; mapPhone.put(phone1,1); mapEmail.put(email1,1); Employee employee3=new Employee("Ram","Siliguri","ram#outlook.com","55","8563878480"); list.add(employee3); String phone2="8563878480"; String email2="ram#outlook.com"; mapPhone.put(phone2,2); mapEmail.put(email2,2); Employee employee4=new Employee("Lakhan","Bhopal","Lakhan#outlook.com","30","8563050698"); list.add(employee4); String phone3="8563050698"; String email3="Lakhan#outlook.com"; mapPhone.put(phone3,3); mapEmail.put(email3,3); Employee employee5=new Employee("Bharat","Ayodhya","Bharat#outlook.com","35","9044669201"); list.add(employee5); String phone4="9044669201"; String email4="Bharat#outlook.com"; mapPhone.put(phone4,4); mapEmail.put(email4,4 );
for (Employee s : list) { System.out.println("\n\n"+s.getName()+" " +s.getAddress()+" " +s.getAge()+" " +s.getEmail()+" " +s.getPhone()); } /Seaching part/ while(true) { System.out.println("==========================================================================================================="); System.out.println("Press 1 for Sort by age\nPress 2 for find the Person by mobile number\nPress 3 for find the Person by email\nPress 4 for update the mobiel number"); choice= sc.nextInt(); sc.nextLine(); switch(choice) { case 1: Collections.sort(list, new Display_Employee ()); for (Employee s : list) { System.out.println(" Name : "+s.getName()+" City : " +s.getAddress()+" Age : " +s.getAge()+" Email : " +s.getEmail()+" Phone : " +s.getPhone()); } System.out.println("===========================================================================================================");
break;
/*case 1 is Running perfectly*/
case 2:
System.out.println("Enter the mobiel number of Employee ");
mob_serch=sc.next();
mob_serch_result=mapPhone.get(mob_serch);
System.out.println("Mobile mob_serch_result is "+mob_serch_result);
Employee Emp_phone_obj=(Employee)list.get(mob_serch_result);
System.out.println("Employee Name: "+Emp_phone_obj.getName()+" Email : "+Emp_phone_obj.getEmail()+" Age : "+Emp_phone_obj.getAge()+" City : "+Emp_phone_obj.getAddress());
break; /*case 2 is Running perfectly*/
case 3:
System.out.println("Enter the emailId of Employee ");
email_serch=sc.nextLine();
email_serch_result=mapEmail.get(email_serch);
System.out.println("Email_serch_result is "+email_serch_result);
Employee Emp_email_obj=(Employee)list.get(email_serch_result);
System.out.println("Employee Name : "+Emp_email_obj.getName()+" Email : "+Emp_email_obj.getEmail()+" Age : "+Emp_email_obj.getAge()+" City : "+Emp_email_obj.getAddress());
break;
case 4:
System.out.println("Enter the mobile number ");
update_search= sc.next();
mob_serch_result=mapPhone.get(update_search);
Employee Emp_update_obj=(Employee)list.get(mob_serch_result);
update_search_email=Emp_update_obj.getEmail();
System.out.println("\t\t\t\t\t\t\tYour Search Result");
System.out.println(" Name: "+Emp_update_obj.getName()+" Email : "+Emp_update_obj.getEmail()+" Age : "+Emp_update_obj.getAge()+" City : "+Emp_update_obj.getAddress());
System.out.println("\t\t\t\t\t\t\tPress Y or y for Confirm and Update\tPress N or n for Cancle");
choice_update=sc.next();
if(choice_update.equalsIgnoreCase("Y")||choice_update.equalsIgnoreCase("y"))
{
mapPhone.remove(update_search);
mapEmail.remove(update_search_email);
list.remove(Emp_update_obj);
System.out.println("Enter the Firstname ");
name1=sc.next();
System.out.println("Enter the City ");
city1=sc.next();
System.out.println("Enter the email ");
email1=sc.next();
System.out.println("Enter the age ");
age1=sc.next();
System.out.println("Enter the MobNum ");
phone1=sc.next();
Employee employee=new Employee(name1,city1,email1,age1,phone1);
list.add(employee);
mapPhone.put(phone1, mob_serch_result);
mapEmail.put(email1, mob_serch_result);
}
break;
default:
System.out.println("\n\t****Please give a valid Input****\t\n");
break;
} }
}//End of main() method }//end of DisplayArrayList class

import java.util.*;
import java.util.concurrent.TimeUnit;
class Employee implements Comparator<Employee> {
private String name;
private String city;
private String email;
private String phone;
private int age;
public Employee(){}
public void setAge(Integer age) {
this.age = age;
}
public void setName(String Name) {
this.name = Name;
}
public void setEmail(String email) {
this.email = email;
}
public void setPhone(String phone) {
this.phone=null;
this.phone = phone;
}
public void setCity(String city) {
this.city = city;
}
public String getPhone() {
return phone;
}
public int getAge() {
return age;
}
public String getName() {
return name;
}
public String getEmail() {
return email;
}
public String getAddress() {
return city;
}
public int compare(Employee o1, Employee o2) { // in the case if when age is Integer
return o1.getAge() - o2.getAge();
}
}
public class Display_Employee {
public static void main(String[] args)
{
int choice,i,size,mob_serch_result,email_serch_result,age,age1;
String name,city,email,phone,mob_serch,email_serch,update_search,choice_update,update_search_email;
String name1,city1,email1,phone1,Update_choice,choice_update_for_phone,choice_update_for_email;
Scanner sc = new Scanner(System.in);
Map< String, Integer > mapEmail=new HashMap< String, Integer >();
Map< String, Integer > mapPhone=new HashMap< String, Integer >();
List<Employee> list = new ArrayList<Employee>();
/*
System.out.println("How much details you want to Enter");
size=sc.nextInt() ;
for(i=0;i<size;i++)
{
System.out.println("\t\t\t\tEnter the "+(i+1)+" Employee Details \t\t\t\t\n");
System.out.println("Enter the name ");
name=sc.next();
System.out.println("Enter the City ");
city=sc.next();
System.out.println("Enter the email ");
email=sc.next();
System.out.println("Enter the age ");
age=sc.nextInt();
System.out.println("Enter the MobNum ");
phone=sc.next();
Employee employee=new Employee();
employee.setAge(age);
employee.setName(name);
employee.setCity(city);
employee.setPhone(phone);
employee.setEmail(email);
list.add(employee);
mapPhone.put(phone,i);
mapEmail.put(email,i);
}*/
/*Test input Start*/
name="Anoop";
city="kanpur";
email="anoop#gmail.com";
age=23;
phone="9415418279";
Employee employee=new Employee();
employee.setAge(age);
employee.setName(name);
employee.setCity(city);
employee.setPhone(phone);
employee.setEmail(email);
list.add(employee);
mapPhone.put(phone,0);
mapEmail.put(email,0);
/*Test input end*/
for (Employee s : list)
{
System.out.println("\n\n"+s.getName()+" " +s.getAddress()+" " +s.getAge()+" " +s.getEmail()+" " +s.getPhone());
}
while(true)
{
System.out.println("===========================================================================================================");
System.out.println("Press 1 for Sort by age\nPress 2 for find the Person by mobile number\nPress 3 for find the Person by email\nPress 4 for update the mobiel number\nPress 5 for print list and free the varible ");
choice= sc.nextInt();
sc.nextLine();
switch(choice)
{
case 1:
Collections.sort(list,new Employee());
for (Employee s : list)
{
System.out.println(" Name : "+s.getName()+" City : " +s.getAddress()+" Age : " +s.getAge()+" Email : " +s.getEmail()+" Phone : " +s.getPhone());
}
System.out.println("===========================================================================================================");
break;
case 2:
System.out.println("Enter the mobile number of Employee ");
mob_serch=sc.next();
mob_serch_result=mapPhone.get(mob_serch);
System.out.println("Mobile mob_serch_result is "+mob_serch_result);
Employee Emp_phone_obj=(Employee)list.get(mob_serch_result);
System.out.println("Employee Name: "+Emp_phone_obj.getName()+" Email : "+Emp_phone_obj.getEmail()+" Age : "+Emp_phone_obj.getAge()+" City : "+Emp_phone_obj.getAddress());
break;
case 3:
System.out.println("Enter the emailId of Employee ");
email_serch=sc.nextLine();
email_serch_result=mapEmail.get(email_serch);
System.out.println("Email_serch_result is "+email_serch_result);
Employee Emp_email_obj=(Employee)list.get(email_serch_result);
System.out.println("Employee Name : "+Emp_email_obj.getName()+" Email : "+Emp_email_obj.getEmail()+" Age : "+Emp_email_obj.getAge()+" City : "+Emp_email_obj.getAddress());
break;
case 4:
System.out.println("\033[H\033[2J"+"\n\n\t\t\tPress P to Edit PhoneNumber & Press E for Edit Email ");
choice_update_for_phone=sc.next();
choice_update_for_email=choice_update_for_phone;
if(choice_update_for_phone.equalsIgnoreCase("P")||choice_update_for_phone.equalsIgnoreCase("p"))
{
System.out.println("Enter the Old Mobile number ");
update_search=sc.next();
mob_serch_result=mapPhone.get(update_search);
System.out.println(" mob_serch_result "+mob_serch_result);
Employee Emp_update_obj_phone=(Employee)list.get(mob_serch_result);
System.out.println("\t\t\t\t\t\t\tYour Search Result");
System.out.println(" Name: "+Emp_update_obj_phone.getName()+" Email : "+Emp_update_obj_phone.getEmail()+" Age : "+Emp_update_obj_phone.getAge()+" City : "+Emp_update_obj_phone.getAddress());
System.out.println("\t\t\t\tPress Y or y for Confirm and Update\tPress N or n for Cancle");
choice_update=sc.next();
if(choice_update.equalsIgnoreCase("Y")||choice_update.equalsIgnoreCase("y"))
{
System.out.println("Enter the New MobNum ");
phone1=sc.next();
Emp_update_obj_phone.setPhone(phone1);
System.out.println("\t\t\t\tupdated entry is :\n");
mapPhone.put(phone1,mob_serch_result); //Map update
System.out.println(" Name: "+Emp_update_obj_phone.getName()+" Email : "+Emp_update_obj_phone.getEmail()+" Age : "+Emp_update_obj_phone.getAge()+" City : "+Emp_update_obj_phone.getAddress()+" PhoneNumber : "+Emp_update_obj_phone.getPhone());
}
}
else if(choice_update_for_email.equalsIgnoreCase("e")||choice_update_for_email.equalsIgnoreCase("E"))
{
System.out.println("Enter the old email ");
update_search_email= sc.next();
email_serch_result=mapEmail.get(update_search_email);
System.out.println(" email_serch_result = "+ email_serch_result);
Employee Emp_update_obj_email=(Employee)list.get(email_serch_result);
System.out.println("\t\t\t\t\t\t\tYour Search Result");
System.out.println(" Name: "+Emp_update_obj_email.getName()+" Email : "+Emp_update_obj_email.getEmail()+" Age : "+Emp_update_obj_email.getAge()+" City : "+Emp_update_obj_email.getAddress());
System.out.println("\t\t\t\t\t\t\tPress Y or y for Confirm and Update\tPress N or n for Cancle");
choice_update=sc.next();
if(choice_update.equalsIgnoreCase("Y")||choice_update.equalsIgnoreCase("y"))
{
System.out.println("Enter the new email ");
email1=sc.next();
Emp_update_obj_email.setEmail(email1);
mapEmail.put(email1,email_serch_result);
}
}
break;
case 5:
Iterator<Employee> itr=list.iterator();
while(itr.hasNext())
{
Employee employe = itr.next();
System.out.print(" name: "+employe.getName());
System.out.print(" email: "+employe.getEmail());
System.out.print(" age: "+employe.getAge());
System.out.println(" phone: "+employe.getPhone());
}
System.gc();
break;
default:
System.out.println("\n\t****Please give a valid Input****\t\n");
break;
}
}
}//End of main() method
}//end of DisplayArrayList class

how to revoe and display objects fom Map

I'm trying to write a program using a Map to map the details of an employee with the hobbies of the employee. The program should take the details of the employee and his/her hobbies as input and then store them as key/value pair in the map. Once the addition of details is complete, then the user should be able to list down all the employees, along with their hobbies and also should be able to view a particular employee's (by giving employee id as input), details and his/her hobbies . Also the user should be able to delete an employee based on the id of the employee.
I have tried as follows. But the method 'deleteEmployee()', 'isEmployeePresent()' and 'displayEmployees()' are erroneous
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
class Employee {
String designation, name;
Date dob;
int employeeID;
float salary;
public Employee(String designation, Date dob, int employeeID, String name,
float salary) {
this.designation = designation;
this.dob = dob;
this.employeeID = employeeID;
this.name = name;
this.salary = salary;
}
public String getDesignation() {
return designation;
}
public Date getDob() {
return dob;
}
public int getEmployeeID() {
return employeeID;
}
public String getName() {
return name;
}
public float getSalary() {
return salary;
}
public void setDesignation(String designation) {
this.designation = designation;
}
public void setDob(Date dob) {
this.dob = dob;
}
public void setEmployeeID(int employeeID) {
this.employeeID = employeeID;
}
public void setName(String name) {
this.name = name;
}
public void setSalary(float salary) {
this.salary = salary;
}
}
class Hobby {
String hobbyDescription, hobbyName;
public Hobby(String hobbyName, String hobbyDescription) {
this.hobbyName = hobbyName;
this.hobbyDescription = hobbyDescription;
}
public String getHobbyName() {
return hobbyName;
}
public String getHobbyDescription() {
return hobbyDescription;
}
public void setHobbyName() {
this.hobbyName = hobbyName;
}
public void setHobbyDescription() {
this.hobbyDescription = hobbyDescription;
}
}
public class EmployeeManagement {
public static void main(String args[]) {
HashMap<Employee, Hobby> hm1 = new HashMap<Employee, Hobby>();
Scanner sc1 = new Scanner(System.in);
System.out.println("How many names do you want to add to the system? ");
int w = sc1.nextInt();
EmployeeManagement ob = new EmployeeManagement();
ob.addEmployees(w, hm1);
ob.displayEmployees(hm1);
while (true) {
System.out.println("1. Delete an employee");
System.out
.println("2. Check whether an employee is present or not");
System.out.println("3. Break the loop and terminates the program");
int ch = sc1.nextInt();
switch (ch) {
case 1:
System.out.println("Enter Employee-I'd:");
int p = sc1.nextInt();
ob.deleteEmployee(p, hm1);
ob.displayEmployees(hm1);
break;
case 2:
System.out.println("Enter Employee-I'd:");
int q = sc1.nextInt();
boolean b = ob.isEmployeePresent(q, hm1);
if (b == true)
System.out.println("The employee is present");
else
System.out.println("The employee is not present");
break;
case 3:
return;
}
}
}
public void addEmployees(int n, Map<Employee, Hobby> abc) {
Scanner sc = new Scanner(System.in);
Employee[] obj1 = new Employee[n];
Hobby[] obj2 = new Hobby[n];
for (int i = 0; i < n; i++) {
System.out.println("Enter Employee name:");
String nm = sc.next();
System.out.println("Enter designation:");
String des = sc.next();
System.out.println("Enter employeeI-D:");
int eId = sc.nextInt();
System.out.println("Enter salary:");
double sl1 = sc.nextDouble();
float sl = (float) sl1;
System.out.println("Enter Hobby-name:");
String hnm = sc.next();
System.out.println("Enter Hobby-description");
String hdes = sc.next();
System.out.println("Enter date-of-birth:");
String dt1 = sc.next();
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
try {
Date dt = formatter.parse(dt1);
obj1[i] = new Employee(des, dt, eId, nm, sl);
obj2[i] = new Hobby(hnm, hdes);
} catch (ParseException e) {
e.printStackTrace();
}
abc.put(obj1[i], obj2[i]);
}
}
public void deleteEmployee(int id, Map<Employee, Hobby> m1) {
if (m1.containsKey((Employee.getEmployeeID()) == id))
m1.remove(Employee);
}
public boolean isEmployeePresent(int id, Map<Employee, Hobby> m2) {
if (m2.containsKey((Employee.getEmployeeID()) == id))
return true;
else
return false;
}
public void displayEmployees(Map<Employee, Hobby> hm) {
for (Map.Entry<Employee, Hobby> m : hm.entrySet()) {
System.out.println(m.getKey() + " " + m.getValue());
}
}
}

You're triying to access Employee methods in a static way:
if(m1.containsKey((Employee.getEmployeeID())==id))
// ↑ here
You must get the instances of Employee inside the map and then compare with the id given:
public void deleteEmployee(int id,Map<Employee,Hobby> m1) {
// iterate in the map searching for the id
for (Entry<Employee, Hobby> entry : map.entrySet()) {
Employee e = entry.getKey(); // here you have the employee
Hobby h = entry.getValue(); // here you have the hobby
// check if this employee have same id than given
if(e.getEmployeeID() == id) { // map contains the employee
m1.remove(e);
}
}
NOTES:
I would recommend to return a boolean to check if employee has been updated, deleted, etc... public boolean deleteEmployee(int id,Map<Employee,Hobby> m1)
I would keep the employees in another way, HashMap does not allow duplicates, so you cannot save more than one Hobby in each employee if you don't declare it like HashMap<Employee, List<Hobby>>.

Edit method for Employee Store.(Using Hashmap)

Hey can anyone help me understand how to do an edit method for my company application. I had previously asked for help with a search method. And i think the edit method might involve the search method.
Here is my code:
EmployeeStore.
//Imports.
import java.util.HashMap;
//********************************************************************
public class EmployeeStore
{
HashMap<String, Employee> map;
//Constructor.
public EmployeeStore()
{
map = new HashMap<String,Employee>();
}
//********************************************************************
//Hashmap Methods.
//Add to the Hashmap : Employee.
public void add(Employee employee)
{
map.put(employee.getEmployeeName(), employee);
}
//********************************************************************
//Remove from the Hashmap : Employee.
public void remove(String key)
{
//Remove the Employee by name.
map.remove(key);
}
//********************************************************************
//Clear the Hashmap : Employee.
public void clear()
{
map.clear();
}
//********************************************************************
//Print the Hashmap : Employee.
public void print()
{
System.out.println("\n********Employee's in the Company.********");
for (Employee employee : map.values())
{
//System.out.println(employee); to print the toString of Employee class
//or:
System.out.println("Employee Name:\t" + employee.getEmployeeName());
System.out.println("Employee Id:\t" + employee.getEmployeeId());
System.out.println("E-mail:\t"+ employee.getEmployeeEmail());
}
}
public Employee get(String name){
return map.get(name);
}
/*public void searchByName ()
{
//(for(Employee e : map.values()) {...})
//and check for each employee if his/her email matches the searched value
for(Employee e : map.values())
{
System.out.println(e);
map.equals(getClass());
}
}*/
//********************************************************************
public Employee searchByName(String name)
{
Employee employee = map.get(name);
System.out.println(employee);
return employee;
}
//********************************************************************
public Employee searchByEmail(String email)
{
for (Employee employee : map.values())
{
if (email.equals(employee.getEmployeeEmail()))
{
System.out.println(employee);
return employee;
}
}
return null;
}
//********************************************************************
//********************************************************************
//********************************************************************
}
Employee class.
//Imports:
//********************************************************************
//Employee Class.
public class Employee
{
//Variables.
private String employeeName;
private int employeeId;
private String employeeEmail;
//********************************************************************
//Constructor.
public Employee(String employeeName, int employeeId, String employeeEmail)
{
this.employeeName = employeeName;
this.employeeId = employeeId;
this.employeeEmail = employeeEmail;
}
//********************************************************************
//Getters.
public String getEmployeeEmail() {
return employeeEmail;
}
public void setEmployeeEmail(String employeeEmail) {
this.employeeEmail = employeeEmail;
}
public String getEmployeeName() {
return employeeName;
}
public int getEmployeeId() {
return employeeId;
}
//********************************************************************
//toString method.
public String toString() {
return "\t\t\tEmployee\n" +
"********************************************************************\n"+
"Employee Name: "+ employeeName +"\n"+
"Employee Id: " + employeeId +"\n"+
"Employee Email: " + employeeEmail;
}
//********************************************************************
}

You can use the put method of java's HashMap for this as well. From the API for HashMap's put method:
If the map previously contained a mapping for this key, the old value is replaced.
So, something like:
public void edit(Employee employee)
{
map.put(employee.getEmployeeName(), employee);
}
And then in the other code:
Employee employee = getEmployeeByName("Someniceemployeename");
if (employee != null)
{
employee.setEmployeeEmail("awesomeness#stackoverflow.com");
edit(employee);
}
As for editing the ID of an employee, you need to take some additional precautions. First, you want to make sure that the map contains the ID you want to edit (as usual). Second, when "editing" the ID you need to first remove the old employee instance from the map (with the old ID) and then add the new employee with put.

SearchByEmail print

I have an EmployeeStore class that stores details for employee's in a company such as Name, id and e-mail. I need a method to search the hashmap by the e-mail addresses of its employees and then print out that individual employee with the matching address.
I got the code to search the map in another answer but can't manage to print the employee.
Here is my code:
public class EmployeeStore {
HashMap<String, Employee> map;
public EmployeeStore() {
map = new HashMap<String, Employee>();
}
//....
public void add(Employee employee) {
map.put(employee.getEmployeeName(), employee);
}
public Employee searchByName(String name) {
Employee employee = map.get(name);
System.out.println(employee);
return employee;
}
public Employee searchByEmail(String email) {
for (Employee employee : map.values()) {
if (email.equals(employee.getEmployeeEmail())) {
return employee;
}
System.out.println(employee);
}
Employee employee = map.get(email);
System.out.println(employee);
return employee;
}
}
To do this i changed my code to this:
public Employee searchByEmail(String email)
{
for (Employee employee : map.values())
{
if (email.equals(employee.getEmployeeEmail()))
{
System.out.println(employee);
return employee;
}
}
return null;
}
Main:
public class MainApp {
private static Scanner keyboard = new Scanner(System.in);
public static void main(String[] args) {
new MainApp().start();
}
public void start() {
EmployeeStore Store = new EmployeeStore();
Store.add(new Employee("James O' Carroll", 18, "hotmail.com"));
Store.add(new Employee("Andy Carroll", 1171, "yahoo.com"));
Store.add(new Employee("Luis Suarez", 7, "gmail.com"));
Store.searchByName("James O' Carroll");
//Store.print();
}
}

Your searchByxxx methods return an Employee so you should read that value then it is easy to print it:
Employee james = Store.searchByName("James O' Carroll");
Employee andy = Store.searchByEmail("yahoo.com");
System.out.println(james);
System.out.println(andy);
and you need to clean the searchByXXX methods a little and remove the unnecessary print statements.

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

Delete and SearchByEmail methods not working - java

You appear to be using Employee(String employeeName) in 2 different ways: return e = new Employee(employeeName); and return e = new Employee(employeeEmail); The field should be one or the other. Perhaps just create Employee() and use setEmployeeEmail.

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Please find how to enter employee details,update,remove,displaying using hashmap

how to revoe and display objects fom Map

Edit method for Employee Store.(Using Hashmap)

SearchByEmail print

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