Thread: Simple Address Book Program Not Working....

Hello everyone. I am just getting into java and I saw on other forums on the web that an address book would be a good program to code for a beginner - intermediate level coder. I know C++ quite well, and Java is still a little foreign to me.

Could you guys look at my code and try and fix it and/or tell me what is wrong with it. Thank you so much!

package address.book.program;


import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class AddressBookProgram {
static Contact contactArray[] = new Contact[100];
public static void main(String[] args) {
DisplayCurrentObject(0);
}
public static void DisplayCurrentObject(int index){
String firstName = Contact.getFirstName();
String lastName = Contact.getLastName();
String address1 = Contact.getAddress1();
String address2 = Contact.getAddress2();
String city = Contact.getCity();
String province = Contact.getProvince();
String postal= Contact.getPostal();

System.out.println("|-----------------------------------------------|");
System.out.println("|Contact #: " + index + " |");
System.out.println("|-----------------------------------------------|");
System.out.println("|First Name: " + firstName + " |");
System.out.println("|Last Name: " + lastName + " |");
System.out.println("|Address1: " + address1 + " |");
System.out.println("|Address2: " + address2 + " |");
System.out.println("|City: " + city + " |");
System.out.println("|Province: " + province + " |");
System.out.println("|Postal Code: " + postal + " |");
System.out.println("|-----------------------------------------------|");
System.out.println("| 'P': Previous 'N': Next |");
System.out.println("|'U': Update 'D': Delete 'C': Create |");
System.out.println("|-----------------------------------------------|");
InputCrudCommand(index);
}


public static void ProgramPathGate(char CrudCommandInputValue, int index){
if (CrudCommandInputValue == 'p') { // Previous
if (index == 0) {
DisplayCurrentObject(0);
}
else {
index--;
DisplayCurrentObject(index);
}
}
if (CrudCommandInputValue == 'n') { // Next
if (index == 100) {
DisplayCurrentObject(0);
}
else {
index++;
DisplayCurrentObject(index);
}
}
if (CrudCommandInputValue == 'u') { // Update
UpdateContact(index);
}
if (CrudCommandInputValue == 'd') { // Delete
DeleteContact(index);
}
if (CrudCommandInputValue == 'c') { // Create
CreateContact();
}
}

public static void CreateContact() {

String currentInfo;
int index = 0;

if((currentInfo = NewContactInput()) != null){
Contact contact = new Contact();
String newlyInputedContactInfo[] = currentInfo.split(",");
Contact.setFirstName(newlyInputedContactInfo[0]); // insert this stuff into update class method
Contact.setLastName(newlyInputedContactInfo[1]);
Contact.setAddress1(newlyInputedContactInfo[2]);
Contact.setAddress2(newlyInputedContactInfo[3]);
Contact.setCity(newlyInputedContactInfo[4]);
Contact.setProvince(newlyInputedContactInfo[5]);
Contact.setPostal(newlyInputedContactInfo[6]);

contactArray[index] = contact;
index++;
DisplayCurrentObject(index);
}
if(NewContactInput() == null) {
System.out.println("Maximum Number of Contacts Reached.");
DisplayCurrentObject(0);
}
}

public static void DeleteContact(int index){

}

public static void UpdateContact(int index){

}

public static void InputCrudCommand(int index) {
String CrudCommandInput = null;
char CrudCommandInputValue = 0;
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.println(" ");
System.out.print(" Choice: ");
CrudCommandInput = reader.readLine();
CrudCommandInputValue = CrudCommandInput.charAt(0);
reader.close();
} catch (IOException e) {
e.printStackTrace();
} catch (NumberFormatException e) {
System.out.println("Input is invalid.");
}
ProgramPathGate(CrudCommandInputValue, index);
}

public static String NewContactInput(){
String userInput = null;
int i = 0;
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter your: First Name, Last Name, Address1, Address2, City, Province, and Postal Code all separated by a comma (,): ");
userInput = reader.readLine();
reader.close();
} catch (IOException e) {
e.printStackTrace();
} catch (NumberFormatException e) {
System.out.println("Input is invalid.");
}
i++;
if (i == 100) {return null;}
return userInput;
}

}
class Contact {

static String firstName, lastName, address1, address2, city, province, postal;

public static void setFirstName (String str) {
firstName = str;

}
public static String getFirstName () {
return firstName;
}

public static void setLastName (String str) {
lastName = str;
}
public static String getLastName () {
return lastName;
}

public static void setAddress1 (String str) {
address1 = str;
}
public static String getAddress1 () {
return address1;
}

public static void setAddress2 (String str) {
address2 = str;
}
public static String getAddress2 () {
return address2;
}

public static void setCity (String str) {
city = str;
}
public static String getCity () {
return city;
}

public static void setProvince (String str) {
province = str;
}
public static String getProvince () {
return province;
}

public static void setPostal (String str) {
postal = str;
}
public static String getPostal () {
return postal;
}
}

Originally Posted by programmer101

Could you guys look at my code and try and fix it and/or tell me what is wrong with it. Thank you so much!

While that would suit you, that would take far too much time to do for every question. You tell us what is wrong with it. Does it compile or have compile errors? Does it run or have runtime errors? Does it run but produce incorrect results or output?
Also please see the announcements page for the use of code tags on the forum.