How do I get my code to recognize the duplicates?

Math 130 Java Programming

Here is an input file:

8
Albert Zoe
8581234567
44
Beth Yup
8582345678
46
Cat Xiver
6193456789
20
Dan Woow
8584567891
2
Esther Uno
8584567890
16
Frankie Uion
4294567123
16
Gab Xvy
6184567234
16
Henrik Que
7604567345
16
 

input file 2:

8
Albert Zoe
8581234567
44
Albert Zoe
8581234567
44
Cat Xiver
6193456789
20
Dan Woow
8584567891
2
Esther Uno
8584567890
16
Frankie Uion
4294567123
10
Gab Xvy
6184567234
12
Henrik Que
7604567345
11
 

output file 1:

Contacts (8)
===================
Name: Albert Zoe      Phone: 8581234567     Age: 44              
Name: Beth Yup        Phone: 8582345678     Age: 46              
Name: Cat Xiver       Phone: 6193456789     Age: 20              
Name: Dan Woow        Phone: 8584567891     Age: 2                
Name: Esther Uno      Phone: 8584567890     Age: 16              
Name: Frankie Uion    Phone: 4294567123     Age: 16              
Name: Gab Xvy         Phone: 6184567234     Age: 16              
Name: Henrik Que      Phone: 7604567345     Age: 16              

Total Friends Age:(44,46,20,2,16,16,16,16) Total: 176

Contacts (8)
===================
Name: Albert Zoe      Phone: 8581234567     Age: 44              
Name: Beth Yup        Phone: 8582345678     Age: 46              
Name: Cat Xiver       Phone: 6193456789     Age: 20              
Name: Dan Woow        Phone: 8584567891     Age: 2                
Name: Esther Uno      Phone: 8584567890     Age: 16              
Name: Frankie Uion    Phone: 4294567123     Age: 16              
Name: Gab Xvy         Phone: 6184567234     Age: 16              
Name: Henrik Que      Phone: 7604567345     Age: 16              

Total Friends Age:(44,46,20,2,16,16,16,16) Total: 176

 

Here in this output file there are duplicate contact detected.

How do I get my code to understand the duplicate detection?

output file 2:

Contacts (8)
===================
Name: Albert Zoe      Phone: 8581234567     Age: 44              
Name: Albert Zoe      Phone: 8581234567     Age: 44              
Name: Cat Xiver       Phone: 6193456789     Age: 20              
Name: Dan Woow        Phone: 8584567891     Age: 2                
Name: Esther Uno      Phone: 8584567890     Age: 16              
Name: Frankie Uion    Phone: 4294567123     Age: 10              
Name: Gab Xvy         Phone: 6184567234     Age: 12              
Name: Henrik Que      Phone: 7604567345     Age: 11              

Total Friends Age:(44,44,20,2,16,10,12,11) Total: 159

Duplicate contact detected: (0)Albert Zoe and (1)Albert Zoe

Contacts (8)
===================
Name: Albert Zoe      Phone: 8581234567     Age: 44              
Name: Albert Zoe(1)   Phone: 8581234567(1)  Age: 0                
Name: Cat Xiver       Phone: 6193456789     Age: 20              
Name: Dan Woow        Phone: 8584567891     Age: 2                
Name: Esther Uno      Phone: 8584567890     Age: 16              
Name: Frankie Uion    Phone: 4294567123     Age: 10              
Name: Gab Xvy         Phone: 6184567234     Age: 12              
Name: Henrik Que      Phone: 7604567345     Age: 11              

Total Friends Age:(44,20,2,16,10,12,11,0) Total: 115

 

My code:


import java.io.File;
import java.util.ArrayList;
import java.util.Scanner;

public class Assignment08
{
   public static void main(String[] args) throws Exception
   {
       File inputData = new File("input02.txt");
       Scanner input = new Scanner(inputData);

       int totalNumber = input.nextInt();
       Friend.friends = new Friend[totalNumber];
       input.nextLine();
       for (int i = 0; i < totalNumber; i++)
       {
           String name = input.nextLine();
           String phone = input.nextLine();
           String age = input.nextLine();
           int ageNum = Integer.parseInt(age);
           Friend.friends[i] = new Friend(name, phone, ageNum);
       }
       printContacts(Friend.friends);
       Friend.showTotalFriendAge();

       ManageDuplicate(Friend.friends);

       printContacts(Friend.friends);
       Friend.showTotalFriendAge();
   }

   public static void printContacts(Friend[] contacts)
   {
       System.out.println("Contacts (" + contacts.length + ")");
       System.out.println("===================");
       for (Friend friend : contacts)
       {
           System.out.println(friend);
       }
       System.out.println();
   }

   public static void ManageDuplicate(Friend[] contacts)
   {
       ArrayList duplicates = new ArrayList<>();
       for (int i = 0; i < contacts.length - 1; i++)
       {
           for (int j = i + 1; j < contacts.length; j++)
           {
               if (contacts[i].equals(contacts[j]))
               {
                   duplicates.add(contacts[i]);
                   duplicates.add(contacts[j]);
               }
           }
       }

       if (!duplicates.isEmpty())
       {
           System.out.println("Duplicate contact detected:");
           for (int i = 0; i < duplicates.size(); i += 2)
           {
               System.out.println("(" + i + ")" + duplicates.get(i).getName() + " and (" + (i + 1) + ")"
                       + duplicates.get(i + 1).getName());
           }
           System.out.println();

           // Modify duplicate entries and set age to 0
           for (Friend duplicate : duplicates)
           {
               duplicate.setName(duplicate.getName() + "(" + duplicates.indexOf(duplicate) + ")");
               duplicate.setPhone(duplicate.getPhone() + "(" + duplicates.indexOf(duplicate) + ")");
               duplicate.setAge(0);
           }
       }
   }
}

public class Friend
{
private String name;
private String phone;
private int age;

public static Friend[] friends;    //array



public String toString()
{
return String.format("%-20s%-20s%-10s","Name: " + name, "Phone: " + phone, "Age: "+ age);
}
public Friend(String name)
{
this.name = name;

}
public Friend(String name, String phone)
{
this.name = name;
this.phone = phone;
}
public Friend(String name, String phone, int age)
{
this.age = age;
this.name = name;
this.phone = phone;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public boolean equals(Friend dest)
{
if(this.name == dest.name && this.phone == dest.phone && this.age == dest.age)
{
return true;
}
else
{
return false;
}

}
public static void showTotalFriendAge()
{
int totalAge = 0;
System.out.print("Total Friends Age:(");
for(int i = 0; i < friends.length; i++)
{
if(i < friends.length - 1)
{
System.out.print(Friend.friends[i].age + ",");
}
else
{
System.out.print(Friend.friends[i].age + "");
}
totalAge += Friend.friends[i].age;
}
System.out.print(") Total: " + totalAge);

}

public static int getNumFriends()
{
return 0;
}


}