I am trying to make a program in java oop in which I create some persons in the main (every person has a name, an age, a status: employed or not).
I want to search these persons by name and display all the details.
For example if a have a person named John and I find it by name, I want to list all the details (status, age and so on).
I tried to implement this method in Person class.
I don t know if is better to create a map which contains all the persons and the name and then to search in it.
Below is my code:
Person CLASS:
package app;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
public class Person extends Employed {
Scanner scan = new Scanner(System.in);
private String name;
private int age;
private int kids;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public int getKids() {
return kids;
}
public void setKids(int kids) {
this.kids = kids;
}
public Person(){
System.out.println("************************************************************");
}
public void displayPerson(){
if(super.getPeriod()==0 && super.getUnemploymentBenefit()==0){
System.out.println(name + " is " + age + " years old, has " + kids + " kids and is employed" + "\nWorking Place: " + super.getWorkingPlace()
+ "\nSallary: " + df.format(super.getSallary()) + " EUR per year" + "\nWorking Time: " + super.getHours() + " hours per day");
}else
System.out.println(name + " is " + age + " years old, has " + kids + " kids and is unemployed" +"\nUnemployment Time: " + Math.round(super.getPeriod())
+ "\nUnemployment Benefit: " + df.format(super.getUnemploymentBenefit()) + " EUR per year");
}
public void searchMethod(){
System.out.println("Are you looking for someone?");
String s = scan.nextLine();
if(s==name) {
System.out.println("Here are all the details about the person you are looking for: ");
}
}
}
Employed CLASS:
package app;
import java.text.DecimalFormat;
public class Employed extends Unemployed {
DecimalFormat df = new DecimalFormat("0.000");
private String WorkingPlace;
private double sallary;
private double hours;
public String getWorkingPlace() {
return WorkingPlace;
}
public void setWorkingPlace(String WorkingPlace) {
this.WorkingPlace = WorkingPlace;
}
public double getSallary() {
return sallary;
}
public void setSallary(double sallary) {
this.sallary = sallary;
}
public double getHours() {
return hours;
}
public void setHours(double hours) {
this.hours = hours;
}
}
Unemployeed CLASS:
package app;
public class Unemployed{
private double period;
private double UnemploymentBenefit;
public double getPeriod() {
return period;
}
public void setPeriod(double period) {
this.period = period;
}
public double getUnemploymentBenefit() {
return UnemploymentBenefit;
}
public void setUnemploymentBenefit(double UnemploymentBenefit) {
this.UnemploymentBenefit = UnemploymentBenefit;
}
}
Program CLASS:
package app;
public class Program extends Person{
public static void main(String[] args) {
Person p1 = new Person();
p1.setName("John Doe");
p1.setAge(47);
p1.setKids(3);
p1.setWorkingPlace("IKEA");
p1.setSallary(12.500);
p1.setHours(12.5);
p1.displayPerson();
p1.searchMethod();
Person p2 = new Person();
p2.setName("Snow Tiffany");
p2.setAge(27);
p2.setKids(0);
p2.setPeriod(15.9);
p2.setUnemploymentBenefit(7.000);
p2.displayPerson();
}
}
First you should add a construtor.
Then you can create an object from class Person like this:
Person p1 = new Person("John Doe", 47,3, "IKEA", 12.500, 12.5);
String personInfo = p1.get(..) + p1.get(..);
System.out.println(personInfo);
Your code is a bit desorganized. Java classes should have constructors. Variables, in general, starts with lowerCase character.
Related
Hi I am writing a code using polymorphism and I would like to print List on the screen but when I am using my code it run toString method from parent class only. How can I fix it?
public class HospitalApp {
public static void main(String[] main){
Hospital hospital = new Hospital();
List<Person> lista = new ArrayList<>();
lista = hospital.showList();
StringBuilder stringBuilder = new StringBuilder();
for(Person person : lista){
stringBuilder.append(person);
stringBuilder.append("\n");
}
System.out.println(stringBuilder.toString());
}
}
public class Hospital{
List<Person> lista = new ArrayList<>();
Person doktor = new Doctor("All", "Bundy",100, 99999);
Person nurse = new Nurse("Iga", "Lis",160, 10);
Person nurse_1 = new Nurse("Magda", "Andrych",160, 20);
public List showList(){
lista.add(doktor);
lista.add(nurse);
lista.add(nurse_1);
return lista;
}
}
public class Person{
private String imie;
private String nazwisko;
private double wyplata;
public Person(){}
public Person(String imie, String nazwisko, double wyplata){
this.imie = imie;
this.nazwisko = nazwisko;
this.wyplata = wyplata;
}
public void setImie(String imie){
this.imie = imie;
}
public String getImie(){
return imie;
}
public void setNazwisko(String nazwisko){
this.nazwisko = nazwisko;
}
public String getNazwisko(){
return nazwisko;
}
public void setWyplata(double wyplata){
this.wyplata = wyplata;
}
public double getWyplata(){
return wyplata;
}
public String toString(){
return getImie() + " " + getNazwisko() + " " + getWyplata();
}
}
public class Nurse extends Person{
private int nadgodziny;
public Nurse(){}
public Nurse(String imie, String nazwisko, double wyplata, int nadgodziny){
super(imie, nazwisko, wyplata);
this.nadgodziny = nadgodziny;
}
public void setNadgodziny(int nadgodziny){
this.nadgodziny = nadgodziny;
}
public int getNadgodziny(){
return nadgodziny;
}
#Override
String toString(){
return getImie() + " " + getNazwisko() + " " + getWyplata() + " " + getNadgodziny();
}
}
public class Doctor extends Person {
private double premia;
public Doctor(){}
public Doctor(String imie, String nazwisko, double wyplata , double premia){
super(imie, nazwisko, wyplata);
this.premia = premia;
}
public double getPremia(){
return premia;
}
public void setPremia(double premia){
this.premia = premia;
}
#Override
String toString(){
return getImie() + " " + getNazwisko() + " " + getWyplata() + " " + getPremia();
}
}
Can someone help me solve this problem?
The problem lies here, in the Person and Doctor class:
#Override
String toString(){
return ...;
}
you are missing the public specifier. There should be an error / warning about that. Apply it to the method signatures and your code will work as you expect it to.
probably you should add to the List not a Person (object) but a value returned by its toString method:
for(Person person : lista){
stringBuilder.append(person.toString);
stringBuilder.append("\n");
}
Person.java
package A;
public class Person {
public String name , surname;
public Person() {
name = " Unknown ";
surname = " Unknown ";
}
public Person(String n , String s) {
name = n;
surname = s;
}
public Person(Person p1) {
name = p1.name;
surname = p1.surname;
}
}
ContactInfo.java
package A.B;
import A.Person;
public class ContactInfo extends Person {
public String phone;
public ContactInfo() {
phone = "Unvalid ";
}
public ContactInfo(String n , String s , String phn) {
super(n,s);
phone = phn;
}
public ContactInfo(ContactInfo ci) {
super(ci);
phone = ci.phone;
}
}
Employee.java
package A.B.C;
import A.B.ContactInfo;
public class Employee extends ContactInfo {
int salary;
public Employee() {
salary = 0;
}
public Employee(String n , String s , String phn ,int sal) {
super(n,s,phn);
salary = sal;
}
public Employee(Employee e) {
super(e);
salary = e.salary;
}
public void show() {
System.out.println("Name: "+name+surname+ " Phone: "+phone+ " Salary: "+salary);
}
}
Office.java
//import A.B.C.Employee;
import A.B.C.*;
class Office {
public static void main(String args[]) {
Employee e1 = new Employee();
System.out.println();
e1.show();
Employee e2 = new Employee(" John "," Snow "," 001122 ",123);
System.out.println();
e2.show();
Employee e3 = new Employee(e2);
System.out.println();
e3.show();
}
}
As in Office.java file when i using this statment : import A.B.C.Employee;
it will shows the desired output but when i using : import
A.B.C.*; it will shows errors. Why it is always fails to get the correct path?
Little help is needed to understand it .
Hi guys i am fairly new to Java but ive come across a problem that i cant seem to fix, the problem is in the 'WashingMachine' Class its not displaying the 'spinSpeed' details , any answers will be appreciated
here are my codes:
enter code here
package test;
public class Client {
private String Name;
private String PhoneNo;
Client () {
Name = null;
PhoneNo= null;
}
Client (String N, String P){
Name = N;
PhoneNo = P;
}
public void setName(String N){
Name = N;
}
public void setPhoneNo(String P) {
PhoneNo = P;
}
public String getName(){
return Name;
}
public String setPhoneNo() {
return PhoneNo;
}
public String toString() {
return "\nName: "+ Name + "\nPhoneNo:"+ PhoneNo.toString();
}
}
enter code here
package test;
public class Machine {
private String Make;
private double Price;
private Client Cust;
public Machine(String make, double price, Client cust)
{
Make = make;
Price = price;
Cust = cust;
}
#Override
public String toString() {
return "\n" +"Make of machine: " + Make + "\n" + "Price: " + Price + "\n" + Cust.toString();
}
public String getMake() {
return Make;
}
public double getprice() {
return Price;
}
public Client getcust() {
return Cust;
}
}
enter code here
package test;
public class WashingMachine extends Machine {
private int spinSpeed;
public WashingMachine (String make, double price, Client cust, int spinSpeed){
super(make, price, cust);
}
#Override
public String toString() {
return "WashingMachine [spinSpeed=" + spinSpeed + ", spinSpeed()=" + spinSpeed() + "]";
}
public int spinSpeed() {
return spinSpeed;
}
enter code here
package test;
import java.util.ArrayList;
public class MachinePurchaseTestVerC {
public static void main(String [] args) {
ArrayList<Machine> gadgets = new ArrayList<Machine> ();
Client mCust2 = new Client("Paul", "0487654321");
Client mCust3 = new Client("Chandra", "0487651234");
Client wCust1 = new Client("Catherine", "0412345678");
Client wCust4 = new Client("Mike", "0412348756");
gadgets.add(new WashingMachine("Bosch", 549.50, wCust1, 3500));
gadgets.add(new Machine("Samsung", 678.50, mCust2));
gadgets.add(new Machine("Electrolux", 449.25, mCust3));
gadgets.add(new WashingMachine("LG", 500.00, wCust4, 3200));
for(int i = 0; i<gadgets.size(); i++){
System.out.println(gadgets.get(i).toString());
System.out.println("----------------------------------");
}
}
}
In your WashingMachine class, you forgot to set the speed in your constructor
public WashingMachine (String make, double price, Client cust, int spinSpeed){
super(make, price, cust);
this.spinSpeed = spinSpeed;
}
hope that helps :)
I am supposed to come up with this output.
But I am getting this instead..
Here is my code:
import java.lang.*;
import java.util.*;
import java.io.*;
public class Sample{
private String name;
private Hashtable customers = new Hashtable();
private Hashtable movies = new Hashtable();
public Sample(String aName){
name = aName;
}
public String getName(){
return name;
}
public void setName(String aName){
name = aName;
}
public void addCustomer (Customer customer) {
customers.put(customer.getName(), customer);
}
public Customer getCustomer (String customerName) {
return (Customer)customers.get(customerName);
}
public void addMovie (Movie movie) {
movies.put(movie.getName(), movie);
}
public Movie getMovie (String movieName) {
return (Movie)movies.get(movieName);
}
public void error (String message) {
System.out.println ("ERROR: " + message);
}
public Enumeration getMovies() {
return movies.elements();
}
public Enumeration getCustomers() {
return customers.elements();
}
public void showAll() {
System.out.println ("name: "+ this.getName());
Enumeration kk = this.getCustomers();
while (kk.hasMoreElements()) {
Customer one = (Customer) kk.nextElement();
System.out.println (one.show());
}
Enumeration ff = this.getMovies();
while (ff.hasMoreElements()) {
Movie one = (Movie) ff.nextElement();
System.out.println (one.show());
}
}
public void test() {
Customer k1 = new Customer ("Jonah") ; this.addCustomer (k1);
Customer k2 = new Customer ("Hellen") ; this.addCustomer (k2);
Customer k3 = new Customer ("Agnes") ; this.addCustomer (k3) ;
Movie f1 = new Movie ("StarWars"); this.addMovie (f1) ;
Movie f2 = new Movie ("Shrek"); this.addMovie (f2) ;
System.out.println("-**-**- test part 1 -**-**-") ;
this.showAll();
System.out.println("-**-**- test part 2 -**-**-") ;
System.out.println("---" + k1.getName() + " rents " + f1.getName());
this.showAll();
k1.doRent(f1);
MY CUSTOMER CLASS:
package eric;
public class Customer {
String name;
public Customer(String nameCus){
name = nameCus;
}
public String getName(){
return name;
}
public String show(){
return name;
}
public void doRent(Movie f1) {
System.out.println(" -"+ " RentData" + "[" + getName() +"," + f1.getName() + "]" );
}
}
MY MOVIE CLASS:
public class Movie {
String name;
int x = 0;
public Movie(String nameMov){
name = nameMov;
}
public String getName(){
return name;
}
public String show(){
return name+"\n"+" - average: "+x +" days\n"+" - number of rentings: "+x ;
}
}
My problem is that i cannot find a way to fix -RentData [Jonah,StarWars] under the name Jonah... Instead it comes at the end of output.. I need some one to help me figure how am ganna do that.. thanks
You're calling k1.doRent(f1) before this.showAll() so naturally you will get the "RentData..." line printed before the names are printed. The way your code is now is not conducive to what you're trying to do at all. Your Customer class should have a member list called rentedMovies that is populated every time you call doRent(...) on a Customer object. Then, Customer.show() should print the name of the customer, followed by your "RentData..." stuff that comes from rentedMovies.
Here is the class:
package employee;
public class Employee
{
private String name, department,position;
private int idNumber;
public Employee(String n, int id, String depart,String pos)
{
n= name;
id=idNumber;
depart=department;
pos=position;
}
public Employee(String n, int id)
{
n= name;
id=idNumber;
department="";
position="";
}
public Employee()
{
name="";
idNumber=0;
department="";
position="";
}
public void setName(String n)
{
n=name;
}
public void setDepartment(String depart)
{
depart=department;
}
public void setPosition(String pos)
{
pos=position;
}
public void setId(int id)
{
id=idNumber;
}
public String getName()
{
System.out.println();
return name;
}
public String getDepartment()
{
return department;
}
public String getPosition()
{
return position;
}
public int getId()
{
return idNumber;
}
}
Here is the program:
package employee;
public class RunEmployee
{
public static void main(String[] args)
{
Employee first= new Employee();
first.setName("Susan Myers");
first.setId(47899);
first.setDepartment("Accounting");
first.setPosition("Vice President");
Employee sec= new Employee("Mark Jones",39119,"IT","Programmer");
Employee third= new Employee("Joy Rogers", 81774);
third.setDepartment("Manfacturing");
third.setPosition("Engineer");
/*Printing employee ones information*/
System.out.print("Employee #1- using the no-arg constructor.");
System.out.println("Name: " + first.getName());
System.out.println("Id Number: "+ first.getId());
System.out.println("Department: " + first.getDepartment());
System.out.println("Position: "+ first.getPosition());
/*Printing employee twos information*/
System.out.println("Name: " + sec.getName());
System.out.println("Id Number: "+ sec.getId());
System.out.println("Department: " + sec.getDepartment());
System.out.println("Position: "+ sec.getPosition());
/*Printing employee threes information*/
System.out.print("Employee #3- using a constructor that accepts the name"
+ "and ID number only.");
System.out.println("Name: " + third.getName());
System.out.println("Id Number: "+ third.getId());
System.out.println("Department:" + third.getDepartment());
System.out.println("Position: "+ third.getPosition());
}
}
For this project, I am simply trying to store values into the constructor in different ways. However, my output is showing that my mutator methods are not storing any values. I tried to post my output but I do not have the reputation points. Basically, all the the values for the things I tried to arguments say zero or null.
You've got your assignments backwards!
n = name; puts the value of name to n, not the other way around.
You are assigning the value from the Employee instance to your passed in parameters. To prevent that, it is probably a good idea to use this -
this.name = n; // <-- assign n to the name field of the current instance.
In your example code, this.n would have given you a compile time error.