Exception in thread "main" java.lang.NullP ointerException
at company.Employe e.inputEmployee (Employee.java: 172)
at company.Employe e.main(Employee .java:267)
which I got before...
Can someone please help me.
This is where the error occures line 172
for (Employee_listi ng e : employees) {
String emp = e.getEmpId();
line 267
if (choice == 1) { // if 1 is select go to makePerson
emp.inputEmploy ee(); -
Here are my
-
-
-
/**
-
* Constructors.
-
*/
-
-
public Employee_listing(String id, String fn, String ln, String st,
-
String ct, String zp, Double pr, Integer yw) {
-
empid = id;
-
fname = fn;
-
lname = ln;
-
street = st;
-
city = ct;
-
zip = zp;
-
yearsworked = yw;
-
payrate = pr;
-
}// close public EmployeeClass
-
-
/*
-
* accessors make info available
-
*/
-
public String getEmpId() {
-
return empid;
-
}
-
-
public String getFname() {
-
return fname;
-
}
-
-
public String getLname() {
-
return lname;
-
}
-
-
public String getStreet() {
-
return street;
-
}
-
-
public String getCity() {
-
return city;
-
}
-
-
public String getZip() {
-
return zip;
-
}
-
-
public Integer getYearsworked() {
-
return yearsworked;
-
}
-
-
public Double getPayrate() {
-
return payrate;
-
}
-
-
-
public void inputEmployee() {
-
-
Employee_listing MyEmployee;
-
-
// prompt for data
-
-
Scanner input_flag = new Scanner(System.in);
-
System.out.println("Enter Employee Id Number AB1234==>");
-
String empid = input_flag.next();
-
String id_flag = "";
-
boolean notfound = true;
-
for (Employee_listing e : employees) {
-
String emp = e.getEmpId();
-
if (emp.equals(id_flag)) {
-
System.out.println("Hello" + ("e.lname"));
-
notfound = false;
-
}
-
}
-
if (notfound == true) {
-
.....
-
}
-
public static void main(String[] args) {
-
Employee emp = new Employee();
-
Scanner kbd = new Scanner(System.in);
-
int choice;
-
System.out.println("Make a Section: ");
-
System.out.println("1. Enter ");
-
System.out.println("2. Find ");
-
System.out.println("3. Exit ");
-
System.out.print("\nPlease press Enter afer each response");
-
System.out.println("Enter your chose please: ");
-
choice = kbd.nextInt();
-
kbd.nextLine();
-
if (choice == 1) { // if 1 is select go to makePerson
-
emp.inputEmployee();
-
....
-
}
-
thanks
sandyw
Apr 19 '07
12  6685 
OK...
I still can not figure out this Exception in thread "main" java.lang.NullP ointerException
so if someone has the time to help me
or tell me how to fix it by example that would be great.
here is my complete code. - package company;
-
-
import java.util.*;
-
-
/**
-
*
-
* @author **
-
-
*/
-
-
/**
-
* This program will maintain Employee Data for a company. The user will be able
-
* to enter new employee data and search on existing employee data. This program
-
* will use Arrays or an ArrayList to maintain the information. You will create
-
* an Employee Class and from this class create Employee Objects. These objects
-
* will be stored in an Array or ArrayList in such a way that they can be
-
* searched by the user.
-
*/
-
-
class Employee_listing {
-
-
private String empid;
-
-
private String lname;
-
-
private String fname;
-
-
private String street;
-
-
private String city;
-
-
private String zip;
-
-
private Integer yearsworked;
-
-
private Double payrate;
-
-
public Employee_listing(String id) {
-
empid = id;
-
}// close the employeeclass loop
-
-
/**
-
* Constructors.
-
*/
-
-
public Employee_listing(String id, String fn, String ln, String st,
-
String ct, String zp, Double pr, Integer yw) {
-
empid = id;
-
fname = fn;
-
lname = ln;
-
street = st;
-
city = ct;
-
zip = zp;
-
yearsworked = yw;
-
payrate = pr;
-
}// close public EmployeeClass
-
-
/*
-
* accessors make info available
-
*/
-
public String getEmpId() {
-
return empid;
-
}
-
-
public String getFname() {
-
return fname;
-
}
-
-
public String getLname() {
-
return lname;
-
}
-
-
public String getStreet() {
-
return street;
-
}
-
-
public String getCity() {
-
return city;
-
}
-
-
public String getZip() {
-
return zip;
-
}
-
-
public Integer getYearsworked() {
-
return yearsworked;
-
}
-
-
public Double getPayrate() {
-
return payrate;
-
}
-
-
/*
-
* Mutator Methods
-
*/
-
public void setEmpId(String id) {
-
empid = id;
-
}
-
-
public void setFname(String fn) {
-
fname = fn;
-
}
-
-
public void setLname(String ln) {
-
lname = ln;
-
}
-
-
public void setStreet(String st) {
-
street = st;
-
}
-
-
public void setCity(String ct) {
-
city = ct;
-
}
-
-
public void setZip(String zp) {
-
zip = zp;
-
}
-
-
public void setYW(Integer yw) {
-
yearsworked = yw;
-
}
-
-
public void setPR(Double pr) {
-
payrate = pr;
-
}
-
}
-
/**
-
* The EmployeeDatabase class stores each Employee in an arraylist. Methods
-
* exist to add new Employees, search Employees, and print Employees to the
-
* console.
-
*/
-
public class Employee {
-
-
public ArrayList<Employee_listing> employees;// ArrayList of
-
-
// contact
-
-
-
-
public void createEmployeeDB() {
-
employees = new ArrayList<Employee_listing>();
-
Employee_listing temp = new Employee_listing("DW12341");
-
temp.setFname("Sandy");
-
temp.setLname("Wong");
-
temp.setStreet("12345 My St");
-
temp.setCity("Fullerton");
-
temp.setZip("90631");
-
temp.setYW(2);
-
temp.setPR(5000.00);
-
employees.add(temp);
-
}
-
-
/**
-
* displayMatch inputs a keyword from the user. It then iterates through
-
* the ArrayList of Employees and outputs each one to the screen if the
-
* Employee information contains the keyword.
-
*/
-
-
public void inputEmployee() {
-
-
Employee_listing MyEmployee;
-
-
// prompt for data
-
-
Scanner input_flag = new Scanner(System.in);
-
System.out.println("Enter Employee Id Number AB1234==>");
-
String empid = input_flag.next();
-
-
boolean notfound = true;
-
for (Employee_listing e : employees) {
-
System.out.println(" a"+e.getLname());
-
String emp = e.getEmpId();
-
-
if (emp.equals(empid)) {
-
System.out.println("Hello" + ("e.lname"));
-
notfound = false;
-
}
-
}
-
if (notfound == true) {
-
-
System.out.print("Enter Last Name Doe==>");
-
String ln = input_flag.next();
-
-
System.out.print("Enter First Name John==>");
-
String fn = input_flag.next();
-
-
System.out.print("Enter Street ==>");
-
String st = input_flag.next();
-
-
System.out.print("Enter City ==>");
-
String ct = input_flag.next();
-
-
System.out.print("Enter Zip ==>");
-
String zp = input_flag.next();
-
-
System.out.print("Enter years worked ==>");
-
Integer yw = input_flag.nextInt();
-
-
System.out.print("Enter payrate as double ==>");
-
Double pr = input_flag.nextDouble();
-
-
// make an object
-
MyEmployee = new Employee_listing(empid, ln, fn, st, ct, zp, pr, yw);
-
employees.add(MyEmployee);
-
-
System.out.println("The are this many Employee in the System:");
-
System.out.println(employees.size());
-
}
-
// still need to add a counter
-
-
}// close the displayMatch
-
-
/**
-
* displayMatch inputs a keyword from the user. It then iterates through
-
* the ArrayList of Employees and outputs each one to the screen if the
-
* Employee information contains the keyword.
-
* @return
-
*/
-
public void displayMatch() {
-
-
Scanner input_flag = new Scanner(System.in);
-
System.out.println("Enter Employee Id Number AB1234==>");
-
String empid = input_flag.next();
-
boolean notfound = true;
-
for (Employee_listing e : employees) {
-
String emp = e.getEmpId();
-
if (emp.equals(empid)) {
-
System.out.println("You need to go back to Main Menu");
-
notfound = false;
-
}
-
}
-
if (notfound == true) {
-
-
for (Employee_listing e : employees) {
-
System.out.printf("Employee Id: %s \n", e.getEmpId());
-
System.out.printf("Name is %s - %s \n", e.getFname(), e
-
.getLname());
-
System.out.printf("Address is %s \n", e.getStreet());
-
System.out.printf("City is %s \n", e.getCity());
-
System.out.printf("Zip is %s \n", e.getZip());
-
System.out.printf("Pay is %s \n", e.getPayrate());
-
System.out.printf("Years worked are %d\n", e.getYearsworked());
-
System.out.println("--------------------");
-
}
-
}
-
}// close the displayMatch
-
-
/**
-
* @param Add
-
* a employee to the db. using a scanner to see if an
-
* Employee is in the db if no add them
-
*/
-
-
public static void main(String[] args) {
-
Employee emp = new Employee();
-
Scanner kbd = new Scanner(System.in);
-
int choice;
-
System.out.println("Make a Section: ");
-
System.out.println("1. Enter ");
-
System.out.println("2. Find ");
-
System.out.println("3. Exit ");
-
System.out.print("\nPlease press Enter afer each response");
-
System.out.println("Enter your chose please: ");
-
choice = kbd.nextInt();
-
kbd.nextLine();
-
if (choice == 1) { // if 1 is select go to makePerson
-
emp.inputEmployee();
-
-
} // close the if loop
-
-
if (choice == 2) { // if 2 is select go to find
-
emp.displayMatch();
-
-
}// close the choice==2
-
if (choice == 3) {
-
System.out.printf("Good bye");
-
}// close the choice == 3
-
-
}// close public static void
-
-
}// close public class Employee
Sandyw
so near yet so far away.
I still need help see above
I still need help see above
Look at your program flow again from the main method. When do you initialize the employees list? You should find that you are trying to access the list before it is initialized.
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