Runtime Error on View Contacts

[Tim Davis]

Here is my code, can someone explain why get a runtime error when choosing option 2 after adding a contact?

Main:

package contactlist;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class ContactList {

/*ArrayList<List.Contact> contactlist;*/

List<Contact> contactlist = new ArrayList<>();


/* Contact contact; */
private int top = 0;

public static void main(String[] args) throws IOException {
    /* Contact contact;
    contact = new Contact();
    List.Contact c;
    c = contact; */
    ContactList list = new ContactList();

    BufferedReader keyIn;
    keyIn = new BufferedReader(new InputStreamReader(System.in));
    String choose = "";
    while (true) {

        System.out.println("\n[1] Add contact");
        System.out.println("[2] View all contacts");
        System.out.println("[3] Quit");
        System.out.print("Choose : ");

        try {
            choose = keyIn.readLine();
        } catch (IOException e) {

            System.out.println("Error");
        }
        switch (choose) {
            case "1":
                list.addContact();
                break;
            case "2":
                list.viewContacts();
                break;
            case "3":
                System.exit(0);
                break;
            default:
                System.out.println("Error");
                break;
        }

    }
}

public ContactList() {
    this.contactlist = new ArrayList<>();
}

public void addContact() throws IOException {
    BufferedReader keyIn;
    keyIn = new BufferedReader(new InputStreamReader(System.in));
    String firstName;
    String lastName;
    String address;
    String email;
    String phone;
    String jobTitle;
    String organization;
    String dateOfBirth;

    Scanner input = new Scanner(System.in);
    System.out.println(
           "Please enter Specify the contact type (1) Personal " +
           "or (2) Business: ");
    int contactType = input.nextInt();
    if (contactType == 1) {
        System.out.print("First Name: ");
        firstName = keyIn.readLine();
        System.out.print("Last Name: ");
        lastName = keyIn.readLine();
        System.out.print("Address: ");
        address = keyIn.readLine();
        System.out.print("E-mail address: ");
        email = keyIn.readLine();
        System.out.print("Phone number: ");
        phone = keyIn.readLine();
        System.out.print("Date of Birth (MM/DD/YYYY): ");
        dateOfBirth = keyIn.readLine();

        PersonalContact entry;
        entry = new PersonalContact(
                 firstName, lastName, address, email, phone, dateOfBirth);
        contactlist.add(entry);
        top++;
        try {
            entry.write();
        } catch (Exception e) {
        }

    } else if (contactType == 2) {
        System.out.print("First Name: ");
        firstName = keyIn.readLine();
        System.out.print("Last Name: ");
        lastName = keyIn.readLine();
        System.out.print("Address: ");
        address = keyIn.readLine();
        System.out.print("E-mail address: ");
        email = keyIn.readLine();
        System.out.print("Phone number: ");
        phone = keyIn.readLine();
        System.out.print("Job Title: ");
        jobTitle = keyIn.readLine();
        System.out.print("Organization: ");
        organization = keyIn.readLine();

        BusinessContact entry;
        entry = new BusinessContact(firstName, lastName,
                address, email, phone, jobTitle, organization);
        contactlist.add(entry);
        top++;
        try {
            entry.write();
        } catch (Exception e) {
        }

    }

}

public void viewContacts() {
    for (int index = 0; index < top; index++) {
        System.out.println(
                (index + 1) + " First Name " + contactlist.get(index).getFirstName());
        System.out.println(
                "Last Name " + contactlist.get(index).getLastName());
        System.out.println(
                 "Address: " + contactlist.get(index).getAddress());
        System.out.println(
                 "E-mail: " + contactlist.get(index).getEmail());
        System.out.println(
                 "Phone: " + contactlist.get(index).getPhone());
        System.out.println(
                 "Job Title " + contactlist.get(index).getJobTitle());
        System.out.println(
                 "Organization " + contactlist.get(index).getOrganization());
        System.out.println(
                 "Date of Birth " + contactlist.get(index).getDateOfBirth());
    }
}

}

Business Contact:

package contactlist;

public class BusinessContact extends Contact {

private String jobTitle;
private String organization;

BusinessContact(String firstName, String lastName,
        String address, String email, String phone, String jobTitle, String organization) {

    super();

    this.jobTitle = jobTitle;
    this.organization = organization;
}

public BusinessContact() {

}

public String getJobTitle() {
    return jobTitle;
}

public void setJobTitle(String jobTitle) {
    this.jobTitle = jobTitle;
}

public String getOrganization() {
    return organization;
}

public void setOrganization(String organization) {
    this.organization = organization;
}

    void write() {
        throw new UnsupportedOperationException("Not supported yet.");
//To change body of generated methods, choose Tools | Templates.
    }

}

Personal Contact:

package contactlist;

public class PersonalContact extends Contact {

private String dateOfBirth;

PersonalContact(String firstName, String lastName,
             String address, String email, String phone, String dateOfBirth) {

    super();

    this.dateOfBirth = dateOfBirth;

}

public PersonalContact() {

}

public String getDateOfBirth() {
    return dateOfBirth;
}

public void setDateOfBirth(String dateOfBirth) {
    this.dateOfBirth = dateOfBirth;

}

    void write() {
        throw new UnsupportedOperationException("Not supported yet.");
//To change body of generated methods, choose Tools | Templates.
    }

}

Contact:

package contactlist;


public class Contact {

    String getFirstName() {
        throw new UnsupportedOperationException("Not supported yet.");
 //To change body of generated methods, choose Tools | Templates.
    }

    String getLastName() {
        throw new UnsupportedOperationException("Not supported yet.");
 //To change body of generated methods, choose Tools | Templates.
    }

    String getAddress() {
        throw new UnsupportedOperationException("Not supported yet.");
 //To change body of generated methods, choose Tools | Templates.
    }

    String getEmail() {
        throw new UnsupportedOperationException("Not supported yet.");
 //To change body of generated methods, choose Tools | Templates.
    }

    String getPhone() {
        throw new UnsupportedOperationException("Not supported yet.");
 //To change body of generated methods, choose Tools | Templates.
    }

    String getJobTitle() {
        throw new UnsupportedOperationException("Not supported yet.");
 //To change body of generated methods, choose Tools | Templates.
    }

    String getOrganization() {
        throw new UnsupportedOperationException("Not supported yet.");
 //To change body of generated methods, choose Tools | Templates.
    }

    String getDateOfBirth() {
        throw new UnsupportedOperationException("Not supported yet.");
 //To change body of generated methods, choose Tools | Templates.
    }
    
}

[Knute Snortum]

Welcome to the Ranch, Tim.

Thanks for formatting your code. Please also UseCodeTags (← click), that will help a lot. I did it for you this time.

[Knute Snortum]

can someone explain why get a runtime error when choosing option 2 after adding a contact?

Aren't you throwing the error?

[Campbell Ritchie]

No. Sorry. With several hundred lines of code, we cannot. Please supply more details and then we can have a go.

Please don't use different text sizes and colours for code, use code tags. I have changed your post, and doesn't it look better I also had to break the long lines, and you can see how it should be done.
I can see some other problems. Your loop in line 139 should read something like this:-

for (Contact c : contactsList)
{
   System.out.println(c);
}

… And your Contact class should override the toString method.
You have an empty catch in line 131, which is dangerous. Does the method that is inside actually compile? Does it give errors about IOException is never thrown?
I don't like while (true)...

Sorry for giving you all that bad news, but we shall try to help you sort it all out.

And welcome to the Ranch

[Tim Davis]

I have updated my code as follows and I am getting there but still throwing an error on view contacts. I am getting the following error:

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - Erroneous tree type: <any>
at contactlist.ContactList.viewContacts(ContactList.java:139)
at contactlist.ContactList.main(ContactList.java:48)

Any further help would be greatly appreciated.

Here is my main:

package contactlist;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class ContactList {

/*ArrayList<List.Contact> contactlist;*/

List<Contact> contactlist = new ArrayList<>();


/* Contact contact; */
private int top = 0;

public static void main(String[] args) throws IOException {
    /* Contact contact;
    contact = new Contact();
    List.Contact c;
    c = contact; */
    ContactList list = new ContactList();

    BufferedReader keyIn;
    keyIn = new BufferedReader(new InputStreamReader(System.in));
    String choose = "";
    while (true) {

        System.out.println("\n[1] Add contact");
        System.out.println("[2] View all contacts");
        System.out.println("[3] Quit");
        System.out.print("Choose : ");

        try {
            choose = keyIn.readLine();
        } catch (IOException e) {

            System.out.println("Error");
        }
        switch (choose) {
            case "1":
                list.addContact();
                break;
            case "2":
                list.viewContacts();
                break;
            case "3":
                System.exit(0);
                break;
            default:
                System.out.println("Error");
                break;
        }

    }
}

public ContactList() {
    this.contactlist = new ArrayList<>();
}

public void addContact() throws IOException {
    BufferedReader keyIn;
    keyIn = new BufferedReader(new InputStreamReader(System.in));
    String firstName;
    String lastName;
    String address;
    String email;
    String phone;
    String jobTitle;
    String organization;
    String dateOfBirth;

    Scanner input = new Scanner(System.in);
    System.out.println("Please enter Specify the contact type (1) Personal or (2) Business: ");
    int contactType = input.nextInt();
    if (contactType == 1) {
        System.out.print("First Name: ");
        firstName = keyIn.readLine();
        System.out.print("Last Name: ");
        lastName = keyIn.readLine();
        System.out.print("Address: ");
        address = keyIn.readLine();
        System.out.print("E-mail address: ");
        email = keyIn.readLine();
        System.out.print("Phone number: ");
        phone = keyIn.readLine();
        System.out.print("Date of Birth (MM/DD/YYYY): ");
        dateOfBirth = keyIn.readLine();

        PersonalContact entry;
        entry = new PersonalContact(firstName, lastName, address, email, phone, dateOfBirth);
        contactlist.add(entry);
        top++;
        try {
            entry.write();
        } catch (Exception e) {
        }

    } else if (contactType == 2) {
        System.out.print("First Name: ");
        firstName = keyIn.readLine();
        System.out.print("Last Name: ");
        lastName = keyIn.readLine();
        System.out.print("Address: ");
        address = keyIn.readLine();
        System.out.print("E-mail address: ");
        email = keyIn.readLine();
        System.out.print("Phone number: ");
        phone = keyIn.readLine();
        System.out.print("Job Title: ");
        jobTitle = keyIn.readLine();
        System.out.print("Organization: ");
        organization = keyIn.readLine();

        BusinessContact entry;
        entry = new BusinessContact(firstName, lastName, address, email, phone, jobTitle, organization);
        contactlist.add(entry);
        top++;
        try {
            entry.write();
        } catch (Exception e) {
        }

    }

}

public void viewContacts() {
    for (int index = 0; index < top; index++) {
        System.out.println((index + 1) + " First Name " + contactlist.get(index).getFirstName());
        System.out.println("Last Name " + contactlist.get(index).getLastName());
        System.out.println("Address: " + contactlist.get(index).getAddress());
        System.out.println("E-mail: " + contactlist.get(index).getEmail());
        System.out.println("Phone: " + contactlist.get(index).getPhone());
        System.out.println("Job Title " + contactlist.get(index).getJobTitle());
        System.out.println("Organization " + contactlist.get(index).getOrganization());
        System.out.println("Date of Birth " + contactlist.get(index).getDateOfBirth());
    }
}

}

Here is my Contact:

package contactlist;

public class Contact {
    private String firstName;
    private String lastName;
    private String address;
    private String email;
    private String phone;
    
    public Contact(String firstName, String lastName, String address, String email, String phone){
        this.firstName = firstName;
        this.lastName = lastName;
        this.address = address;
        this.email = email;
        this.phone = phone;
    }
    
    public String getfirstName() {
        return this.firstName;
    }
    
    public String setfirstName(){
        return (this.firstName = firstName);
    }
    
    public String getlastName() {
        return this.lastName;
    }
    
    public String setlastName(){
        return (this.lastName = lastName);
    }

    public String getAddress() {
        return this.address;
    }
    
    public String setAddress(){
        return (this.address = address);
    }

    public String getEmail() {
        return this.email;
    }
    
    public String setEmail(){
        return (this.email = email);
    }

    public String getPhone() {
        return this.phone;
    }
    
    public String setPhone(){
        return (this.phone = phone);
    }

    String getFirstName() {
        return firstName;
    }

    String getLastName() {
        return lastName;
    }

    String getJobTitle() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    String getOrganization() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    String getDateOfBirth() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

}

Here is my Personal Contact:

package contactlist;

public class PersonalContact extends Contact {

    private String dateOfBirth;

    public PersonalContact(String firstName, String lastName, String address, String email, String phone, String dateOfBirth) {
        super(firstName, lastName, address, email, phone);
        this.dateOfBirth = dateOfBirth;
    }

    public String getDateOfBirth() {
        return dateOfBirth;
}

    public void setDateOfBirth(String dateOfBirth) {
        this.dateOfBirth = dateOfBirth;
    }
    
    void write() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}

Here is Business Contact:

package contactlist;

public class BusinessContact extends Contact {

    private String jobTitle;
    private String organization;

    public BusinessContact(String firstName, String lastName, String address, String email, String phone, String jobTitle, String organization) {
        super(firstName, lastName, address, email, phone);
        this.jobTitle = jobTitle;
        this.organization = organization;
}

    public String getJobTitle() {
        return jobTitle;
}

    public void setJobTitle(String jobTitle) {
        this.jobTitle = jobTitle;
}

    public String getOrganization() {
        return organization;
}

    public void setOrganization(String organization) {
        this.organization = organization;
}

    void write() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

}

[Campbell Ritchie]

You are not getting a runtime error at all. You are forcing your IDE to try and execute uncompiled code. Don't. If you want help you will have to tell us the error messages from the IDE's compiler.