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THIS IS MY CODE
i tried to do it but i couldn't

Write a program to read 2 students full names starting with first then fathers name then family , (separated by blanks , e.g : ashelly joe daniel ), then :

• If these two students have same full names display ( These are duplicate names) .
• If they are brothers display (They are brothers or sisters)
• If they are only from same family , display (They are relatives)
• If none of the above , display (May be , they are just friends).

Note : find a way to avoid case-sensitivity, because some will enter names capital or small letters , but for us it should be the same. ( ashelly == ASHELLY)

Code:

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import java.util.*;
public class MARC
{
static Scanner console = new Scanner(System.in);
public static void main(String [] args)
{

String name1, name2;
int apos1, apos2, rpos1, rpos2;
String first, second, father1, father2, family1, family2;

System.out.println("enter first name: ");
 name1 = console.nextLine();
 
 System.out.println("enter second name: ");
 name2 = console.nextLine();
 
 apos1 = name1.indexOf(' ');
apos2 = name1.indexOf(' ', apos1);
 
 rpos1 = name2.indexOf(' ');
 rpos2 = name2.indexOf(' ', rpos1);
 
 first = name1.substring(0, apos1);
 father1 = name1.substring(apos1+1,apos2+1);
 family1 = name1.substring(apos2);
 
  second = name2.substring(0, rpos1);
  father2 = name2.substring(rpos1+1, rpos2+1);
  family2 = name2.substring(rpos2);
 
 if
 (first.equals(second))
 {
  if
        (father1.equals(father2))
       
          if
                (family1.equals(family2))
 System.out.println("These are duplicate names");
 
 
else if
 (first.equals(second))
        if
 (father1.equals(father2))
          if
        (family1.equals(family2))
       
        System.out.println("They are brothers or sisters");


else if
 (family1.equals(family2))
 System.out.println("They are relatives");
 
 }
 
 else
 System.out.println("May be , they are just friends");
 
 
 }}

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Code:

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if
 (first.equals(second))
 {
  if
        (father1.equals(father2))
       
          if
                (family1.equals(family2))
 System.out.println("These are duplicate names");

---

use this
if(first.equals(second) && father1.equals(father2) && family1.equals(family2));

Code:

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else if
 (first.equals(second))
        if
 (father1.equals(father2))
          if
        (family1.equals(family2))
       
        System.out.println("They are brothers or sisters");

---

use this:
else if
(!first.equals(second) && father1.equals(father2) && family1.equals(family2));

I'll try to write a better code later.

Quote:

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Note : find a way to avoid case-sensitivity, because some will enter names capital or small letters , but for us it should be the same. ( ashelly == ASHELLY)

---

my opinion
change every
console.nextLine();
with
console.nextLine().toLowerCase();

I wrote some code. I think it works.

Code:

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import java.util.Scanner;

public class CompareStudents {
       
       
       
        public static void main(String[] args) {
                Scanner console = new Scanner(System.in);
                String consoleFirstName;
                String consoleSecondName;
                String consoleFirstFatherName;
                String consoleSecondFatherName;
                String consoleFirstFamilyName;
                String consoleSecondFamilyName;
               
                consoleFirstName = console.nextLine().toLowerCase();
                consoleSecondName = console.nextLine().toLowerCase();
                consoleFirstFatherName = console.nextLine().toLowerCase();
                consoleSecondFatherName = console.nextLine().toLowerCase();
                consoleFirstFamilyName = console.nextLine().toLowerCase();
                consoleSecondFamilyName = console.nextLine().toLowerCase();
               
                Student stud1 = new Student(consoleFirstName, consoleFirstFatherName, consoleFirstFamilyName);
                Student stud2 = new Student(consoleSecondName, consoleSecondFatherName, consoleSecondFamilyName);
               
                stud1.compareStudents(stud2);
               
        }
}

class Student {
        String firstName;
        String fathersName;
        String familyName;
       
        Student(String firName, String fatName, String famName) {
                firstName = firName;
                fathersName = fatName;
                familyName = famName;
        }
       
        public String getFirstName() {
                return firstName;
        }

        public void setFirstName(String firstName) {
                this.firstName = firstName;
        }

        public String getFathersName() {
                return fathersName;
        }

        public void setFathersName(String fathersName) {
                this.fathersName = fathersName;
        }

        public String getFamilyName() {
                return familyName;
        }

        public void setFamilyName(String familyName) {
                this.familyName = familyName;
        }

        public void compareStudents(Student student2) {
                if((this.getFirstName()).equals(student2.getFirstName()) && (this.getFathersName()).equals(student2.getFathersName()) && (this.getFamilyName()).equals(student2.getFamilyName()))
                                System.out.println("These are duplicate names");
                else if((this.getFathersName()).equals(student2.getFathersName()) && (this.getFamilyName()).equals(student2.getFamilyName()))
                        System.out.println("They are brothers or sisters");
                else if((this.getFamilyName()).equals(student2.getFamilyName()))
                        System.out.println("They are relatives");
                else
                        System.out.println("May be , they are just friends");
        }
}

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thank you :rolleyes: