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Return user input into setter function

I have been working on an assignment and i am stuck at here. Basically i have 1 class which defines all functions and members.
And another class to initialize and manipulate objects.
Here is my first class code.
public class cyryxStudent_association {
String studentID, studentName, studentCourse_level, studentTitle;
int course_completed_year;
static double registration_fee;
double activity_fee;
double total_amt;
//Default constructor
cyryxStudent_association ()
{
studentID = "Null";
studentName = "Null";
studentCourse_level = "Null";
studentTitle = "Null";
course_completed_year = 0;
}
//Parameterized Constructor
cyryxStudent_association (String id, String name, String course_level, String title, int ccy)
{
this.studentID = id;
this.studentName = name;
this.studentCourse_level = course_level;
this.studentTitle = title;
this.course_completed_year = ccy;
}
//Getters
public String getStudentID ()
{
return studentID;
}
public String getStudentName ()
{
return studentName;
}
public String getStudentCourse_level ()
{
return studentCourse_level;
}
public String getStudentTitle ()
{
return studentTitle;
}
public int getCourse_completed_year ()
{
return course_completed_year;
}
public double getRegistration_fee ()
{
return registration_fee;
}
public double getActivity_fee ()
{
return findActivity_fee(registration_fee);
}
public double getTotal_amt ()
{
return total_amt(registration_fee, activity_fee);
}
//Setters
public void setStudentID (String id)
{
studentID = id;
}
public void setStudentName (String name)
{
studentName = name;
}
public void setStudentCourse_level (String course_level)
{
studentCourse_level = course_level;
}
public void setStudentTitle (String title)
{
studentTitle = title;
}
public void setCourse_completed_year (int ccy)
{
course_completed_year = ccy;
}
//Find registration fee method
public static double findRegistration_fee (String course_level)
{
if (course_level.equalsIgnoreCase("Certificate"))
{
registration_fee = 75;
}
else if (course_level.equalsIgnoreCase("Diploma"))
{
registration_fee = 100;
}
else if (course_level.equalsIgnoreCase("Degree"))
{
registration_fee = 150;
}
else if (course_level.equalsIgnoreCase("Master"))
{
registration_fee = 200;
}
return registration_fee;
}
//Find activity method
public static double findActivity_fee (double registration_fee)
{
return registration_fee * 0.25;
}
//Find total amount
public static double total_amt (double registration_fee, double activity_fee)
{
return registration_fee + activity_fee;
}
//To string method
public String toString ()
{
return "ID: "+getStudentID()+"\nName: "+getStudentName()+"\nCourse Level:
"+getStudentCourse_level()+"\nTitle: "+getStudentTitle()+"\nCourse Completed Year:
"+getCourse_completed_year()+"\nRegistration Fee: "+getRegistration_fee()+"\nActivity Fee:
"+getActivity_fee()+"\nTotal Amount: "+getTotal_amt ();
}
}
And here is my second class code.
import java.util.Scanner;
public class test_cyryxStudent_association {
public static void main (String[] args)
{
Scanner sc = new Scanner (System.in);
int num, i;
System.out.println("Welcome!");
System.out.println("\nEnter the number of students: ");
num = sc.nextInt();
sc.nextLine();
cyryxStudent_association Std[] = new cyryxStudent_association[num];
for (i = 0; i < Std.length; i++)
{
System.out.println("\nEnter ID: ");
Std[i].setStudentID(sc.nextLine());
System.out.println("Enter Name: ");
Std[i].setStudentName(sc.nextLine());
System.out.println("Enter Course Level [Certificate, Diploma, Degree, Master]: ");
Std[i].setStudentCourse_level(sc.nextLine());
System.out.println("Enter Title: ");
Std[i].setStudentTitle(sc.nextLine());
Std[i].getRegistration_fee();
Std[i].getActivity_fee();
Std[i].getTotal_amt();
}
for (i = 0; i < Std.length; i++)
{
System.out.println("\nStudent " + i + 1 + " Information");
System.out.println("===================================");
Std[i].toString();
}
sc.close();
}
}
I get an error when values in the for loop. Can someone help me? I'm pretty new to programming and studying java for 2 months now. What am i doing wrong?
Here is my objectives.
Create an array of objects and get user input for number of objects to be manipulated.
Read and display array of object values.
Thank you!

You have to initialize the objects of your array.
After the line:
cyryxStudent_association Std[] = new cyryxStudent_association[num];
do a for loop like:
for(i = 0; i<std.length; i++){
std[i] = new cyryxStudent_association();
}

Testing (if..Else if...Else) statement (not working)

Testing an if else statement that does not seem to be working
Assuming it has something to do with possibly changing the IF else to the getter instead of setter?
or something to do with the variable returning an INT instead of string?
little confused been rearranging and modifying this code for a while now and cant get it to work
//package Driver2;
import java.util.Scanner;
class Person{
private String name;
private String address;
private String number;
private int customerPurchase = 0;
//Constructors
public Person(String name, String address, String number, int customerPurchase){
this.name = name;
this.address = address;
this.number = number;
this.customerPurchase = customerPurchase;
}
public Person(){}
//Accessors
public String getName(){
return this.name;
}
public String getAddress(){
return this.address;
}
public String getNumber(){
return this.number;
}
public int getcustomerPurchase(){
return this.customerPurchase;
}
//Mutators
public void setName(String n){
this.name = n;
}
public void setAddress(String a){
this.address = a;
}
public void setNumber(String n){
this.number = n;
}
public void setcustomerPurchase(int a){
this.customerPurchase = a;
}
public void setcustomerDiscount(int r)
{
r = this.customerPurchase;
if (r > 500)
{
System.out.print("5%");
}
else if (r >= 1000)
{
System.out.print("6%");
}
else if (r >= 1500)
{
System.out.print("7%");
}
else if (r >= 2000)
{
System.out.print("10%");
}
else
{
System.out.print("");
}
}
}
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
class Customer extends Person{
private String customerNumber;
private boolean recieveMail;
private int customerDiscount;
//Constructors
public Customer(String name, String address, String number, String customerN, boolean rm, int customerPurchase) {
super(name, address, number, customerPurchase);
this.customerNumber = customerN;
this.recieveMail = rm;
}
public Customer(){}
//Accessors
public String getCustomerNumber(){
return this.customerNumber;
}
public boolean getRecieveMail(){
return this.recieveMail;
}
public int getcustomerDiscount()
{
return customerDiscount;
}
//Mutators
public void setCustomerNumber(String c){
this.customerNumber = c;
}
public void setRecieveMail(boolean r){
this.recieveMail = r;
}
}
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
class Driver1 extends Customer
{
//private int customerPurchase = 0;
//Constructors
/* public Driver1(String name, String address, String number, String customerN, boolean rm, int customerPurchase)
{
super();
this.customerPurchase = customerPurchase;
//this.customerDiscount = customerDiscount;
}*/
public Driver1(String name, String address, String number, String customerN, boolean rm, int customerPurchase) {
//super(name, address, number, customerPurchase, customerN, rm);
//this.customerPurchase = customerN;
//this.customerDiscount = pc;
}
public Driver1()
{}
//Accessors
/*
public int getcustomerDiscount()
{
return this.customerDiscount;
}
/*
#Override
public int getcustomerPurchase()
{
return this.customerPurchase;
}
//Mutators
#Override
public void setcustomerPurchase(int c)
{
this.customerPurchase = c;
}*/
/*
public void setcustomerDiscount(int r)
{
this.customerPurchase = r;
if (r >= 500)
{
System.out.print("5%");
}
else if (r >= 1000)
{
System.out.print("6%");
}
else if (r >= 1500)
{
System.out.print("7%");
}
else if (r >= 2000)
{
System.out.print("10%");
}
else
{
System.out.print("");
}
}
*/
}
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
public class Main
{
public static void main(String args[]){
Scanner scanner = new Scanner(System.in);
System.out.print("Enter name of customer:");
String name1 = scanner.nextLine();
System.out.print("Enter address of customer:");
String address1 = scanner.nextLine();
System.out.print("Enter phone number of customer:");
String number1 = scanner.nextLine();
System.out.print("Enter customer number:");
String customerNumber = scanner.nextLine();
System.out.print("Enter yes/no -- does the customer want to recieve mail?:");
String answer = scanner.nextLine();
boolean recieveMail = (answer.equals("yes"));
System.out.print("Enter amount customer has spent:");
int customerPurchase = scanner.nextInt();
Customer customer = new Customer(name1, address1, number1, customerNumber, recieveMail, customerPurchase);
System.out.println("\nCustomer: ");
System.out.println("Name: "+customer.getName());
System.out.println("Address: "+customer.getAddress());
System.out.println("Phone Number: "+customer.getNumber());
System.out.println("Customer Number: "+customer.getCustomerNumber());
System.out.println("Recieve Mail?: "+customer.getRecieveMail());
System.out.println("Amount Purchased: "+customer.getcustomerPurchase());
System.out.println("Percent off: "+customer.getcustomerDiscount());
}
}

The code you have pasted require some changes actually.Assuming you need to return the discount percentage based on the customer input you need to do the following changes.
1) You have a setCustomerDiscount in Person class but the entity you are dealing here is of Customer type so you need to add the setCustomerDiscount in the Customer class instead of Person class.
2) As you want to show the percentage in String(as per your sysout statements/ you can also change to Int as required) you need to change the return type to String instead of Int.
3) Another thing is your order of the if/else if conditions should be in descending order.
Once you fix them, you can get your output as expected.
Below I have made those changes:
import java.util.Scanner;
class Person{
private String name;
private String address;
private String number;
private int customerPurchase = 0;
//Constructors
public Person(String name, String address, String number, int customerPurchase){
this.name = name;
this.address = address;
this.number = number;
this.customerPurchase = customerPurchase;
}
public Person(){}
//Accessors
public String getName(){
return this.name;
}
public String getAddress(){
return this.address;
}
public String getNumber(){
return this.number;
}
public int getcustomerPurchase(){
return this.customerPurchase;
}
//Mutators
public void setName(String n){
this.name = n;
}
public void setAddress(String a){
this.address = a;
}
public void setNumber(String n){
this.number = n;
}
public void setcustomerPurchase(int a){
this.customerPurchase = a;
}
public void setcustomerDiscount(int r)
{
}
}
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
class Customer extends Person{
private String customerNumber;
private boolean recieveMail;
private String customerDiscount;
//Constructors
public Customer(String name, String address, String number, String customerN, boolean rm, int customerPurchase) {
super(name, address, number, customerPurchase);
this.customerNumber = customerN;
this.recieveMail = rm;
}
public Customer(){}
//Accessors
public String getCustomerNumber(){
return this.customerNumber;
}
public boolean getRecieveMail(){
return this.recieveMail;
}
public String getcustomerDiscount()
{
return customerDiscount;
}
//Mutators
public void setCustomerNumber(String c){
this.customerNumber = c;
}
public void setRecieveMail(boolean r){
this.recieveMail = r;
}
public void setcustomerDiscount(int r)
{
String customerDiscount = "";
if (r >= 2000)
{
customerDiscount="10%";
System.out.print("10%");
}
else if (r >= 1500)
{
customerDiscount="7%";
System.out.print("7%");
}
else if (r >= 1000)
{
customerDiscount="6%";
System.out.print("6%");
}
else if (r > 500)
{
customerDiscount="5%";
System.out.print("5%");
}
else
{
System.out.print("");
}
this.customerDiscount = customerDiscount;
}
}
public class TestMain
{
public static void main(String args[]){
Scanner scanner = new Scanner(System.in);
System.out.print("Enter name of customer:");
String name1 = scanner.nextLine();
System.out.print("Enter address of customer:");
String address1 = scanner.nextLine();
System.out.print("Enter phone number of customer:");
String number1 = scanner.nextLine();
System.out.print("Enter customer number:");
String customerNumber = scanner.nextLine();
System.out.print("Enter yes/no -- does the customer want to recieve mail?:");
String answer = scanner.nextLine();
boolean recieveMail = (answer.equals("yes"));
System.out.print("Enter amount customer has spent:");
int customerPurchase = scanner.nextInt();
scanner.close();
Customer customer = new Customer(name1, address1, number1, customerNumber, recieveMail, customerPurchase);
System.out.println("\nCustomer: ");
System.out.println("Name: "+customer.getName());
System.out.println("Address: "+customer.getAddress());
System.out.println("Phone Number: "+customer.getNumber());
System.out.println("Customer Number: "+customer.getCustomerNumber());
System.out.println("Recieve Mail?: "+customer.getRecieveMail());
System.out.println("Amount Purchased: "+customer.getcustomerPurchase());
customer.setcustomerDiscount(customerPurchase);
System.out.println("Percent off: "+ customer.getcustomerDiscount());
}
}
Hope it helps...

I think it is a logical problem. Simply order the discount formula in reverse.
Catch the big numbers first:
if r >= 2000 print 10%
else if r >= 1500 print 7%
else if r >= 1000 print 6%
else if r >= 500 print 5%
else print nothing
I hope that helps you

Java Program Unable to receive the input and program terminated prematurely

I'm not sure y this coding is not receiving the input for the adjust variable and gets terminated before it runs completely
public class Question {
int id;
String name;
String type;
double amt;
public Question(int id, String name, String type, double amt) {
this.id = id;
this.name = name;
this.type = type;
this.amt = amt;
}
public static void main(String[] args)
{ }
}
import java.util.*;
public class Answer {
public static void gettype(Question[] q,String adjust)
{
for(int i=0;i<2;i++)
{
if(q[i].getType()==adjust)
{
System.out.println(q[i].getId());
}
}}
public static void main(String[] args) {
int id;
String name,type,adjust;
double amt;
Scanner s=new Scanner(System.in);
Answer a=new Answer();
System.out.println("enter 2 car inputs");
Question[] q=new Question[2];
for(int i=0;i<2;i++)
{
id=s.nextInt();
s.nextLine();
name=s.nextLine();
type=s.nextLine();
amt=s.nextDouble();
q[i]= new Question(id,name,type,amt);
}
adjust=s.nextLine();
a.gettype(q,adjust);
}
}
While running the code i am able to get the inputs for the car object array.But after that i am not able to get the values for the variable adjust.
So please need help with this one.
I have tried simply to print the objects at the constructor side.
But not able to receive the 9th input which will be assigned to the var adjust

I think this is better. You should understand why mine works.
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Question {
private int id;
private String name;
private String type;
private double amt;
Question(int id, String name, String type, double amt) {
this.id = id;
this.name = name;
this.type = type;
this.amt = amt;
}
int getId() {
return id;
}
String getName() {
return name;
}
String getType() {
return type;
}
double getAmt() {
return amt;
}
#Override
public String toString() {
final StringBuffer sb = new StringBuffer("Question{");
sb.append("id=").append(id);
sb.append(", name='").append(name).append('\'');
sb.append(", type='").append(type).append('\'');
sb.append(", amt=").append(amt);
sb.append('}');
return sb.toString();
}
}
class Answer {
public static final int NUM_QUESTIONS = 2;
public static void main(String[] args) {
int numQuestions = (args.length > 0) ? Integer.valueOf(args[0]) : NUM_QUESTIONS;
List<Question> questions = new ArrayList<>();
Scanner s = new Scanner(System.in);
for (int i = 0; i < numQuestions; ++i) {
System.out.println(String.format("Question %d", i));
System.out.print("id: ");
int id = s.nextInt();
System.out.print("name: ");
String name = s.next();
System.out.print("type: ");
String type = s.next();
System.out.print("amt: ");
double amt = s.nextDouble();
questions.add(new Question(id, name, type, amt));
}
System.out.println(questions);
}
}

Sum all double values of objects stored in ArrayList (Java)

I have an ArrayList that contains objects. Each of the object has 3 values: String name, double price, int quantity. How to write method that will sum all doubles of objects and print the result. And also if int quantity>1, price will be multiplied by quantity.
Code that i wrote so far:
Product class
public class Product {
private String name;
private double price;
private int quantity;
public Product(String name, double price, int quantity) {
this.name = name;
this.price = price;
}
public String getName() {
return name;
}
public double getPrice() {
return price;
}
public static Product createProduct(String name, double price, int quantity){
return new Product(name, price, quantity);
}
}
Product list class
import java.util.ArrayList;
import java.util.List;
public class ProductList {
private String name;
List<Product> newList;
public ProductList(String name) {
this.name = name;
this.newList = new ArrayList<>();
}
public boolean addNewProduct(Product product) {
if (findProduct(product.getName()) >= 0) {
System.out.println("Product is already on the list");
return false;
}
newList.add(product);
return true;
}
public boolean removeProduct(Product product) {
if (findProduct(product.getName().toUpperCase()) < 0) {
System.out.println("Product not found");
return false;
}
newList.remove(product);
return true;
}
private int findProduct(String productName) {
for (int i = 0; i < newList.size(); i++) {
Product product = newList.get(i);
if (product.getName().equals(productName)) {
return i;
}
}
return -1;
}
public Product queryProduct(String name) {
int position = findProduct(name);
if (position >= 0) {
return this.newList.get(position);
}
return null;
}
public double sumProducts() {
double sum = 0;
for (int i = 0; i < newList.size(); i++) {
sum += newList.get(i).getPrice();
}
return sum;
}
/*public boolean listProducts(){};
public boolean updateProduct(){};
*/
}
Simulation class:
public class Simulation {
private static Scanner scanner = new Scanner(System.in);
private static ProductList myProductList = new ProductList("My list");
private static void addNewProduct() {
System.out.println("Enter new product name: ");
String name = scanner.nextLine();
System.out.println("Enter new product price: ");
double price = scanner.nextDouble();
System.out.println("Enter new product quantity");
int quantity = scanner.nextInt();
Product newProduct = Product.createProduct(name, price, quantity);
if (myProductList.addNewProduct(newProduct) == true) {
System.out.println("New product added: " + name + " | price: " + price + " | quantity: " + quantity);
}
}
private static void removeProduct() {
System.out.println("Enter product name: ");
String name = scanner.nextLine().toUpperCase();
Product existingProduct = myProductList.queryProduct(name);
if (existingProduct == null) {
System.out.println("No such product");
return;
}
if (myProductList.removeProduct(existingProduct)) {
System.out.println("Sucessfully deleted product: " + existingProduct.getName());
} else {
System.out.println("Error deleting");
}
}
private static void printActions() {
System.out.println("Avaiable actions");
System.out.println("press: ");
System.out.println("0 - to shut down\n" +
"1 - to add new product\n" +
"2 - to remove product\n" +
"3 - to sum all products");
}
private static void sumProducts(){
myProductList.sumProducts();
}
public static void main(String[] args) {
printActions();
boolean quit = false;
while (!quit)
try {
System.out.println("\nEnter action: ");
int action = scanner.nextInt();
scanner.nextLine();
switch ((action)) {
case 0:
System.out.println("\nShutting down...");
quit = true;
break;
case 1:
addNewProduct();
break;
case 2:
removeProduct();
break;
}
} catch (InputMismatchException e) {
System.out.println("Bad key pressed, only values form 0 to 2 accepted");
scanner.nextLine();
}
}
}
Thanks in advance

You can do it in one line using Java 8.
public double sumProducts() {
return newList.stream().mapToDouble(product -> product.getPrice() * product.getQuantity()).sum();
}

If you use double to store the price, you will get incorrect answers when you try to add and multiply the values. For example, 0.1 + 0.2 is NOT the same double as 0.3. If you want accurate arithmetic for decimal numbers, you should use the BigDecimal class in place of double. If you don't do that, I can guarantee that your program will sometimes give wrong answers.
So you need to change your Product class as follows.
public class Product {
private String name;
private BigDecimal price;
private int quantity;
public Product(String name, BigDecimal price, int quantity) {
this.name = name;
this.price = price;
}
public String getName() {
return name;
}
public BigDecimal getPrice() {
return price;
}
public static Product createProduct(String name, BigDecimal price, int quantity){
return new Product(name, price, quantity);
}
}
You will also need to make corresponding changes in the code that calls the methods of this class.
Once you've done that, you can use the methods of the BigDecimal class to do arithmetic. It might look something like this.
public BigDecimal calculateTotalPrice() {
BigDecimal total = BigDecimal.ZERO;
for (Product product : newList) {
BigDecimal linePrice = product.getPrice().multiply(new BigDecimal(product.getQuantity()));
total = total.add(linePrice);
}
return total;
}

the sum of each product was missing multiply by its quantity.
public double sumProducts() {
double sum = 0;
for (int i = 0; i < newList.size(); i++) {
Product product = newList.get(i);
sum += product.getPrice() * product.getQuantity();
}
return sum;
}

java.util.Scanner; vs JOptionPane; [closed]

Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 8 years ago.
Improve this question
Please I would like know How would I implement JOptionPane instead of import java.util.Scanner;
I also have 4 separate classes
If i implement JOptionPane will it clean up the code I would also like to know any changes anyone would make.
Employee.Class
import java.text.NumberFormat;
import java.util.Scanner;
public class Employee {
public static int numEmployees = 0;
protected String firstName;
protected String lastName;
protected char gender;
protected int dependents;
protected double annualSalary;
private NumberFormat nf = NumberFormat.getCurrencyInstance();
public Benefit benefit;
private static Scanner scan;
public Employee() {
firstName = "";
lastName = "";
gender = 'U';
dependents = 0;
annualSalary = 40000;
benefit = new Benefit();
numEmployees++;
}
public Employee(String first, String last, char gen, int dep, Benefit benefit1) {
this.firstName = first;
this.lastName = last;
this.gender = gen;
this.annualSalary = 40000;
this.dependents = dep;
this.benefit = benefit1;
numEmployees++;
}
public double calculatePay1() {
return annualSalary / 52;
}
#Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("First Name: ").append(firstName).append("\n");
sb.append("Last Name: ").append(lastName).append("\n");
sb.append("Gender: ").append(gender).append("\n");
sb.append("Dependents: ").append(dependents).append("\n");
sb.append("Annual Salary: ").append(nf.format(getAnnualSalary())).append("\n");
sb.append("Weekly Pay: ").append(nf.format(calculatePay1())).append("\n");
sb.append(benefit.toString());
return sb.toString();
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getFirstName() {
return firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getLastName() {
return lastName;
}
public <Gender> void setGender(char gender) {
this.gender = gender;
}
public <Gender> char getGender() {
return gender;
}
public void setDependents(int dependents) {
this.dependents = dependents;
}
public void setDependents(String dependents) {
this.dependents = Integer.parseInt(dependents);
}
public int getDependents() {
return dependents;
}
public void setAnnualSalary(double annualSalary) {
this.annualSalary = annualSalary;
}
public void setAnnualSalary(String annualSalary) {
this.annualSalary = Double.parseDouble(annualSalary);
}
public double getAnnualSalary() {
return annualSalary;
}
public double calculatePay() {
return annualSalary / 52;
}
public double getAnnualSalary1() {
return annualSalary;
}
public static void displayDivider(String outputTitle) {
System.out.println(">>>>>>>>>>>>>>> " + outputTitle + " <<<<<<<<<<<<<<<");
}
public static String getInput(String inputType) {
System.out.println("Enter the " + inputType + ": ");
scan = new Scanner(System.in);
String input = scan.next();
return input;
}
public static int getNumEmployees() {
return numEmployees;
}
public static void main(String[] args) {
displayDivider("New Employee Information");
Benefit benefit = new Benefit();
Employee employee = new Employee("George", "Anderson", 'M', 5, benefit);
System.out.println(employee.toString());
System.out.println("Total employees: " + getNumEmployees());
displayDivider("Hourly Temp Employee Information");
Hourly hourly = new Hourly("Mary", "Nola", 'F', 5, 14, 45, "temp");
System.out.println(hourly.toString());
System.out.println("Total employees: " + getNumEmployees());
displayDivider("Hourly Full Time Employee Information");
Hourly hourly1 = new Hourly("Mary", "Nola", 'F', 5, 18, 42, "full time");
System.out.println(hourly1.toString());
System.out.println("Total employees: " + getNumEmployees());
displayDivider("Hourly Part Time Employee Information");
Hourly hourly11 = new Hourly("Mary", "Nola", 'F', 5, 18, 20, "part time");
System.out.println(hourly11.toString());
System.out.println("Total employees: " + getNumEmployees());
displayDivider("Salaried Revised Employee Information");
Benefit benefit1 = new Benefit("None", 500, 3);
Salaried salaried = new Salaried("Frank", "Lucus", 'M', 5, 150000, benefit1, 3);
System.out.println(salaried.toString());
System.out.println("Total employees: " + getNumEmployees());
displayDivider("Salaried Employee Information");
Benefit benefit11 = new Benefit("None", 500, 3);
Salaried salaried1 = new Salaried("Frank", "Lucus", 'M', 5, 100000, benefit11, 2);
System.out.println(salaried1.toString());
System.out.println("Total employees: " + getNumEmployees());
}
}
SALARIED.CLASS
import java.util.Random;
import java.util.Scanner;
public class Salaried extends Employee {
private static final int MIN_MANAGEMENT_LEVEL = 0;
private static final int MAX_MANAGEMENT_LEVEL = 3;
private static final int BONUS_PERCENT = 10;
private int managementLevel;
private Scanner in;
public Salaried() {
super();
Random rand = new Random();
managementLevel = rand.nextInt(4) + 1;
if (managementLevel == 0) {
System.out.println("Not Valid");
}
//numEmployees++;
}
private boolean validManagementLevel(int level) {
return (MIN_MANAGEMENT_LEVEL <= level && level <= MAX_MANAGEMENT_LEVEL);
}
public Salaried(String fname, String lname, char gen, int dep,
double sal, Benefit ben, int manLevel)
{
super.firstName = fname;
super.lastName = lname;
super.gender = gen;
super.dependents = dep;
super.annualSalary = sal;
super.benefit = ben;
while (true) {
if (!validManagementLevel(manLevel)) {
System.out.print("Invalid management level, please enter
another management level value in range [0,3]: ");
manLevel = new Scanner(System.in).nextInt();
} else {
managementLevel = manLevel;
break;
}
}
//numEmployees++;
}
public Salaried(double sal, int manLevel) {
super.annualSalary = sal;
while (true) {
if (!validManagementLevel(manLevel)) {
System.out.print("Invalid management level, please enter another
management level value in range [0,3]: ");
in = new Scanner(System.in);
manLevel = in.nextInt();
} else {
managementLevel = manLevel;
break;
}
}
// numEmployees++;
}
#Override
public double calculatePay() {
double percentage = managementLevel * BONUS_PERCENT;
return (1 + percentage/100.0) * annualSalary / 52;
}
#Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(super.toString());
sb.append("Management Level: ").append(managementLevel).append("\n");
return sb.toString();
}
}
Hourly.Class
import java.util.Scanner;
public class Hourly extends Employee {
private static final double MIN_WAGE = 10;
private static final double MAX_WAGE = 75;
private static final double MIN_HOURS = 0;
private static final double MAX_HOURS = 50;
private double wage;
private double hours;
private String category;
private Scanner in;
private Scanner in2;
private Scanner in3;
private Scanner in4;
public Hourly() {
super();
this.wage = 20;
this.hours= 30;
this.category = "full time";
annualSalary = wage * hours * 52;
}
public Hourly(double wage_, double hours_, String category_) {
while (true) {
if (!validWage(wage_)) {
System.out.print("Invalid wage: ");
in2 = new Scanner(System.in);
wage_ = in2.nextDouble();
} else {
this.wage = wage_;
break;
}
}
while (true) {
if (!validHour(hours_)) {
System.out.print("Invalid hours: ");
in = new Scanner(System.in);
hours_ = in.nextDouble();
} else {
this.hours = hours_;
break;
}
}
while (true) {
if (!validCategory(category_)) {
System.out.print("Invalid category, please enter another category value: ");
category_ = new Scanner(System.in).next();
} else {
this.category = category_;
break;
}
}
annualSalary = wage * hours * 52;
//numEmployees++;
}
public Hourly(String fname, String lname, char gen, int dep, double wage_,double hours_, String category_) {
super.firstName = fname;
super.lastName = lname;
super.gender = gen;
super.dependents = dep;
super.annualSalary = annualSalary;
super.benefit = benefit;
while (true) {
if (!validWage(wage_)) {
System.out.print("Invalid wage : ");
in3 = new Scanner(System.in);
wage_ = in3.nextDouble();
} else {
this.wage = wage_;
break;
}
}
while (true) {
if (!validHour(hours_)) {
System.out.print("Invalid hours : ");
hours_ = new Scanner(System.in).nextDouble();
} else {
this.hours = hours_;
break;
}
}
while (true) {
if (!validCategory(category_)) {
System.out.print("Invalid category, please enter another category value: ");
in4 = new Scanner(System.in);
category_ = in4.next();
} else {
this.category = category_;
break;
}
}
annualSalary = wage * hours * 52;
//numEmployees++;
}
private boolean validHour(double hour) {
return (MIN_HOURS <= hour && hour <= MAX_HOURS);
}
private boolean validWage(double wage) {
return (MIN_WAGE <= wage && wage <= MAX_WAGE);
}
private boolean validCategory(String category) {
String[] categories = {"temp", "part time", "full time"};
for (int i = 0; i < categories.length; i++)
if (category.equalsIgnoreCase(categories[i]))
return true;
return false;
}
public double calculatePay() {
return annualSalary / 52;
}
#Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(super.toString());
sb.append("Wage: ").append(wage).append("\n");
sb.append("Hours: ").append(hours).append("\n");
sb.append("Category: ").append(category).append("\n");
return sb.toString();
}
}
Benefit.Class
public class Benefit {
private String healthInsurance;
private double lifeInsurance;
private int vacationDays;
public Benefit() {
healthInsurance = "Full";
lifeInsurance = 100;
vacationDays = 5;
}
public Benefit(String health, double life, int vacation) {
setHealthInsurance(health);
setLifeInsurance(life);
setVacation(vacation);
}
#Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Health Insurance: ").append(healthInsurance).append("\n");
sb.append("Life Insurance: ").append(lifeInsurance).append("\n");
sb.append("Vacation Days: ").append(vacationDays).append("\n");
return sb.toString();
}
public void setHealthInsurance(String healthInsurance) {
this.healthInsurance = healthInsurance;
}
public String getHealthInsurance() {
return healthInsurance;
}
public void setLifeInsurance(double lifeInsurance) {
this.lifeInsurance = lifeInsurance;
}
public double getLifeInsurance() {
return lifeInsurance;
}
public void setVacation(int vacation) {
this.vacationDays = vacation;
}
public int getVacation() {
return vacationDays;
}
public void displayBenefit() {
this.toString();
}
}

Start by taking a look at How to Make Dialogs...
What you basically want is to use JOptionPane.showInputDialog, which can be used to prompt the use for input...
Yes, there are a few flavours, but lets keep it simply and look at JOptionPane.showInputDialog(Object)
The JavaDocs tells us that...
message - the Object to display
Returns:user's input, or null meaning the user canceled the input
So, from that we could use something like...
String value = JOptionPane.showInputDialog("What is your name?");
if (value != null) {
System.out.println("Hello " + value);
} else {
System.out.println("Hello no name");
}
Which displays...
Now, if we take a look at your code, you could replace the use of scan with...
public static String getInput(String inputType) {
String input = JOptionPane.showInputDialog("Enter the " + inputType + ": ");
return input;
}
As an example...
Now, what I might recommend is creating a simple helper method which can be used to prompt the user in a single line of code, for example...
public class InputHelper {
public static String promptUser(String prompt) {
String input = JOptionPane.showInputDialog(prompt);
return input;
}
}
which might be used something like...
String value = InputHelper.promptUser("Please enter the hours worked");
hours_ = Double.parse(value);
And this is where it get's messy, as you will now need to valid the input of the user.
You could extend the idea of the InputHelper to do automatic conversions and re-prompt the user if the value was invalid...as an idea

It is much easier than you think, if you try. Get used to reading the Java API.
http://docs.oracle.com/javase/7/docs/api/javax/swing/JOptionPane.html
Even has examples.
String input;
JOptionPane jop=new JOptionPane();
input=jop.showInputDialog("Question i want to ask");
System.out.println(input);