everything is fine except displayMatch() and deleteMatch() the result that showing is "No matches" while input that i have entered has some matches
may this part of the question will help
import java.util.ArrayList;
import java.util.Scanner;
import java.lang.*;
public class ContactDatabase
{
private ArrayList<Contact> contacts; // ArrayList of contact
private static final int QUIT = 0; // Menu choices
private static final int ADD = 1;
private static final int LISTALL = 2;
private static final int SEARCH = 3;
private static final int DELETE = 4;
/**
* Default constructor - make a new ArrayList object with parameter type Contact
*/
ContactDatabase()
{
contacts = new ArrayList<Contact>();
}
/**
* inputContact inputs contact information from the keyboard.
* It then stores this new contact in the contacts ArrayList.
*/
public void inputContact()
{
Scanner input = new Scanner(System.in);
System.out.println("Please enter first and last names: ");
String firstName = input.next();
String lastName = input.nextLine();
/* while (input != null || input != " ") {
//firstLast = input.nextLine();
}
contacts.add(firstName);
contacts.add(lastName);
*/
System.out.println("Now enter " + firstName + " " + lastName + "\'s email address: ");
String emailAddress = input.nextLine();
if (emailAddress.indexOf('@') < 0) {
System.out.println("No '@' in email address\n Please enter a correct email address: ");
}
if (emailAddress.indexOf('.') < 0) {
System.out.println("No '.' in email address!");
} else {
//emailAddress = input.nextLine();
System.out.println("Email address accepted!");
}
System.out.println("Please enter " + firstName + " " + lastName + "\'s phone number: ");
String phoneNumber = input.nextLine();
boolean number = false;
int n = 0;
while (n < phoneNumber.length()) {
char c = phoneNumber.charAt(n);
if (!(c >= '0' && c <= '9'))
number = false;
n++;
}
number = true;
phoneNumber = phoneNumber.replaceAll("\\-","");
phoneNumber = phoneNumber.replaceAll("\\(","");
phoneNumber = phoneNumber.replaceAll("\\)","");
System.out.println("Phone number accepted.");
Contact newContact = new Contact(firstName, lastName, phoneNumber, emailAddress);
contacts.add(newContact);
System.out.println(firstName + "" + lastName + " has been added as a contact.");
}
/**
* displayAll iterates through the ArrayList of contacts and outputs each one
* to the screen.
*/
public void displayAll()
{
System.out.println("Your contacts are: ");
for (Contact c : contacts)
{
if (contacts.isEmpty()) {
System.out.println("No contacts.");
} else {
System.out.println(c);
}
}
}
/**
* displayMatch inputs a keyword from the user.
* It then iterates through the ArrayList of contacts and outputs each one
* to the screen if the contact information contains the keyword.
*/
public void displayMatch()
{
System.out.println("Enter keyword: ");
Scanner input = new Scanner(System.in);
String in = input.next();
for (Contact c : contacts)
{
if (in.equals(c)) {
System.out.println(c);
} else {
System.out.println("No matches.");
}
}
}
/**
* deleteMatch inputs a keyword from the user.
* It then iterates through the ArrayList of contacts and asks the user
* if the contact should be deleted, if the contact information contains the keyword.
*/
public void deleteMatch()
{
System.out.println("Enter keyword: ");
Scanner input = new Scanner(System.in);
String in = input.next();
for (Contact c : contacts)
{
if (in.equals(c)) {
System.out.println("Should " + c + " be deleted? (type 'YES' or 'Y')");
//in = input.nextLine();
boolean done = false;
while (! done)
{
if (in.equalsIgnoreCase("yes") || in.equalsIgnoreCase("y")) {
contacts.remove(c);
} else {
done = true;
}
}
} else {
System.out.println("No matches!");
}
}
}
// Main class
public static void main(String[] args)
{
ContactDatabase cdb = new ContactDatabase();
Scanner scan = new Scanner(System.in);
int choice = ADD;
// Main menu
while (choice != QUIT)
{
System.out.println();
System.out.println("Choose from the following:");
System.out.println("0) Quit");
System.out.println("1) Add new contact");
System.out.println("2) List all contacts");
System.out.println("3) Search contacts by keyword and display");
System.out.println("4) Search contacts by keyword and remove");
choice = scan.nextInt();
switch (choice)
{
case ADD: cdb.inputContact();
break;
case LISTALL: cdb.displayAll();
break;
case SEARCH: cdb.displayMatch();
break;
case DELETE: cdb.deleteMatch();
break;
}
}
}
/**
* The inner class, Contact, stores the details for a single contact.
* There is no error checking on any of the input. Whatever string is
* passed in for a given attribute is accepted.
*/
class Contact
{
private String first, last, phone, email;
/**
* Constructors.
*/
public Contact()
{
}
public Contact(String first, String last, String phone, String email)
{
this.first = first;
this.last = last;
this.phone = phone;
this.email = email;
}
/*
* Accessor Methods
*/
public String getFirst()
{
return first;
}
public String getLast()
{
return last;
}
public String getPhone()
{
return phone;
}
public String getEmail()
{
return email;
}
/*
* Mutator Methods
*/
public void setFirst(String first)
{
this.first = first;
}
public void setLast(String last)
{
this.last = last;
}
public void setPhone(String phone)
{
this.phone = phone;
}
public void setEmail(String em)
{
this.email = em;
}
/*
* Return all fields concatenated into a string
*/
public String toString()
{
return last + ", " + first + ". " + phone + ", " + email;
}
public boolean equals(Object otherObject)
{
if (otherObject ==null)
{
return false;
}
else if (getClass() != otherObject.getClass())
{
return false;
}
else
{
Contact otherContact = (Contact)otherObject;
return (first.equals(otherContact.first) &&
last.equals(otherContact.last)&&
phone.equals(otherContact.phone)&&
email.equals(otherContact.email));
}
}
} // end inner class, Contact
} // end class, ContactDatabase
