Below are the methods to implement a Septet Class using Sextet Class in Java:

Using direct values

// Java program to illustrate
// implementing Septet Class
// from Sextet Class
// using direct values

import java.util.*;
import org.javatuples.*;

class Prutor {

public static void main(String[] args)
{
// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = new Septet<String, String, String, String, String, String, String>(
"Septet",
sextet.getValue0(),
sextet.getValue1(),
sextet.getValue2(),
sextet.getValue3(),
sextet.getValue4(),
sextet.getValue5());

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Septet, Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Using Sextet.add() method
// Java program to illustrate
// implementing Septet Class
// from Sextet Class
// using add()

import java.util.*;
import org.javatuples.*;

class Prutor {
public static void main(String[] args)
{
// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = sextet.add("Septet");

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit, Septet]
Using Sextet.addAtX() method
Program 1: Adding at Position 0 using addAt0()

// Java program to illustrate
// implementing Septet Class
// from Sextet Class
// using addAt0()

import java.util.*;
import org.javatuples.*

class Prutor {
public static void main(String[] args)
{
// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = sextet.addAt0("Septet");

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Septet, Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Program 2: Adding at Position 1 using addAt1()

// Java program to illustrate
// implementing Septet Class
// from Sextet Class
// using addAt1()

import java.util.*;
import org.javatuples.*;

class Prutor {
public static void main(String[] args)
{
// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = sextet.addAt1("Septet");

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Sextet, Septet, Quintet, Quartet, Triplet, Pair, Unit]
Program 3: Adding at Position 2 using addAt2()

// Below is a Java program to demonstrate
// use of addAt2() method with
// direct value

import java.util.*;
import org.javatuples.*

class Prutor {
public static void main(String[] args)
{
// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = sextet.addAt2("Septet");

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Sextet, Quintet, Septet, Quartet, Triplet, Pair, Unit]
Program 4: Adding at Position 3 using addAt3()

// Below is a Java program to demonstrate
// use of addAt3() method with
// direct value

import java.util.*;
import org.javatuples.*

class Prutor {
public static void main(String[] args)
{
// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = sextet.addAt3("Septet");

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Sextet, Quintet, Quartet, Septet, Triplet, Pair, Unit]
Program 5: Adding at Position 4 using addAt4()

// Below is a Java program to demonstrate
// use of addAt4() method with
// direct value

import java.util.*;
import org.javatuples.*

class Prutor {
public static void main(String[] args)
{

// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = sextet.addAt4("Septet");

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Sextet, Quintet, Quartet, Triplet, Septet, Pair, Unit]
Program 6: Adding at Position 5 using addAt5()

// Below is a Java program to demonstrate
// use of addAt5() method with
// direct value

import java.util.*;
import org.javatuples.*

class Prutor {
public static void main(String[] args)
{
// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = sextet.addAt5("Septet");

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Sextet, Quintet, Quartet, Triplet, Pair, Septet, Unit]
Program 7: Adding at Position 6 using addAt6()

// Below is a Java program to demonstrate
// use of addAt6() method with
// direct value

import java.util.*;
import org.javatuples.*

class Prutor {
public static void main(String[] args)
{
// Create Sextet
Sextet<String, String, String, String, String, String>
sextet = new Sextet<String, String, String, String, String, String>(
"Sextet", "Quintet", "Quartet", "Triplet", "Pair", "Unit");

// Print the Sextet
System.out.println("Sextet: " + sextet);

// Create Septet from Sextet
Septet<String, String, String, String, String, String, String>
septet = sextet.addAt6("Septet");

// Print the Septet
System.out.println("Septet: " + septet);
}
}
Output:

Sextet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit]
Septet: [Sextet, Quintet, Quartet, Triplet, Pair, Unit, Septet]