Create Septet Tuple in Java

Java does not have built-in tuple support; to use the tuple, we use the third-party library called Javatuples. This library provides classes representing fixed-size tuples of different sizes. The Septet class is one of these classes that represents a tuple with 7 values.

Creating a Septet Tuple in Java

We can create a Septet in Java in the following ways:

• Using a Constructor
• Using fromCollection() method
• Using with() method
• Using fromArray() method

Using a Constructor

The constructor of the Septet class accepts 7 values and creates a Septet object.

Septet(A value0, B value1, C value2, D value3, E value4, F value5, G value6)

We can create a Septet tuple by passing seven values to its constructor as shown below:

Septet<String, String, String, String, String, String, String> s = new Septet<>("A", "B", "C", "D", "E", "F", "G");

Example

Following example creates a Septet object using its constructor:

import org.javatuples.Septet;

public class Demo {
   public static void main(String[] args) {
      Septet<String, String, String, String, String, String, String> s =
         new Septet<>("A", "B", "C", "D", "E", "F", "G");
      System.out.println(s);
   }
}

Output of the above code is:

[A, B, C, D, E, F, G]

Using fromCollection() Method

We can create a Septet object by passing a collection to the fromCollection() method (of the same class). The given collection object should contain exactly 7 elements; otherwise, this method throws an IllegalArgumentException.

Example

In the following example, we are creating a Septet object from a Set:

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

public class Demo {
   public static void main(String[] args) {
      Set<String> set = new LinkedHashSet<>();
      set.add("One");
      set.add("Two");
      set.add("Three");
      set.add("Four");
      set.add("Five");
      set.add("Six");
      set.add("Seven");

      Septet<String, String, String, String, String, String, String> s = Septet.fromCollection(set);
      System.out.println(s);
   }
}

Output of the above code is:

[One, Two, Three, Four, Five, Six, Seven]

Example

In the following example, we are creating a Septet object from a List:

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

public class Demo {
   public static void main(String[] args) {
      List<String> list = Arrays.asList("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");

      Septet<String, String, String, String, String, String, String> s = Septet.fromCollection(list);
      System.out.println(s);
   }
}

Output of the above code is:

[Sun, Mon, Tue, Wed, Thu, Fri, Sat]

Using with() method

The with() method is a static method that accepts seven values and creates a Septet object. Following is the Syntax:

Septet.with("A", "B", "C", "D", "E", "F", "G");

Example

In this example, we are creating a Septet using the with() method:

import org.javatuples.Septet;

public class Demo {
   public static void main(String[] args) {
      Septet<String, String, String, String, String, String, String> s =
         Septet.with("Red", "Orange", "Yellow", "Green", "Blue", "Indigo", "Violet");
      System.out.println(s);
   }
}

Output of the above code is:

[Red, Orange, Yellow, Green, Blue, Indigo, Violet]

Using fromArray() method

We can also create a Septet object by passing an array (with seven elements) to the fromArray() method. Following is the syntax:

fromArray(values);

Example

In this example, we are creating a Septet using the fromArray() method:

import org.javatuples.Septet;

public class Demo {
   public static void main(String[] args) {
      String[] planets = {"Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus"};

      Septet<String, String, String, String, String, String, String> s = Septet.fromArray(planets);
      System.out.println(s);
   }
}

Output of the above code is:

[Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus]

Conclusion

The Septet class in the Javatuples library is used to store and handle exactly seven values in a single object. The class offers multiple methods for instantiation, including with(), fromCollection(), and fromArray().