A Octet is a Tuple from JavaTuples library that deals with 3 elements. Since this Octet is a generic class, it can hold any type of value in it.

Since Octet is a Tuple, hence it also has all the characterstics of JavaTuples:

• They are Typesafe
• They are Immutable
• They are Iterable
• They are Serializable
• They are Comparable (implements Comparable<Tuple>)
• They implement equals() and hashCode()
• They also implement toString()

Class Declaration

public final class Octet<A, B, C, D, E, F, G, H> extends Tuple
implements IValue0<A>, IValue1<B>, IValue2<C>, IValue3<D>, IValue4<E>, 
                                            IValue5<F, IValue6<G, IValue7<H>

Class hierarchy

Object
  ↳ org.javatuples.Tuple
      ↳ org.javatuples.Octet<A, B, C, D, E, F, G, H>

Creating Octet Tuple

• From Constructor:

  Syntax:

  Octet<A, B, C, D, E, F, G, H> octet = 
      new Octet<A, B, C, D, E, F, G, H>
          (value1, value2, value3, value4, value5, value6, value7, value8);
  

  Example:

  
  

  
  
  

  // Below is a Java program to create // a Octet tuple from Constructor    import java.util.*; import org.javatuples.Octet;    class GfG {     public static void main(String[] args)     {         Octet<Integer, Integer, Integer.Integer, Integer, Integer, Integer, Integer> octet             = Octet.with(Integer.valueOf(1),                          Integer.valueOf(2),                          Integer.valueOf(3),                          Integer.valueOf(4),                          Integer.valueOf(5),                          Integer.valueOf(6),                          Integer.valueOf(7),                          Integer.valueOf(8));            System.out.println(octet);     } }

  Output:

  
  
  
  

  [1, 2, 3, 4, 5, 6, 7, 8]
  

• Using with() method: The with() method is a function provided by the JavaTuples library, to instantiate the object with such values.

  Syntax:

  Octet<type1, type2, type3, type4, type5, type6, type7> octet = 
      Octet.with(value1, value2, value3, value4, value5, value6, value7, value8);
  

  Example:

  
  

  
  
  

  // Below is a Java program to create // a Octet tuple from with() method    import java.util.*; import org.javatuples.Octet;    class GfG {     public static void main(String[] args)     {         Octet<Integer, Integer, Integer.Integer, Integer, Integer, Integer, Integer> octet             = Octet.with(Integer.valueOf(1),                          Integer.valueOf(2),                          Integer.valueOf(3),                          Integer.valueOf(4),                          Integer.valueOf(5),                          Integer.valueOf(6),                          Integer.valueOf(7),                          Integer.valueOf(8));            System.out.println(octet);     } }

  Output:

  [1, 2, 3, 4, 5, 6, 7, 8]
  

• From other collections: The fromCollection() method is used to create a Tuple from a collection, and fromArray() method is used to create from an array. The collection/array must have the same type as of the Tuple and the number of values in the collection/array must match the Tuple class.

  Syntax:

  Octet<type1, type2, type3, type4, type5, type6, type7> octet = 
      Octet.fromCollection(collectionWith_8_value);
  
  Octet<type1, type2, type3, type4, type5, type6, type7> octet = 
      Octet.fromArray(arrayWith_8_value);
  

  Example:

  
  

  
  
  

  // Below is a Java program to create // a Octet tuple from Collection    import java.util.*; import org.javatuples.Octet;    class GfG {     public static void main(String[] args)     {         // Creating Octet from List         List<Integer> list = new ArrayList<Integer>();         list.add(1);         list.add(2);         list.add(3);         list.add(4);         list.add(5);         list.add(6);         list.add(7);         list.add(8);            Octet<Integer, Integer, Integer, Integer, Integer, Integer, Integer> octet             = Octet.fromCollection(list);            // Creating Octet from Array         Integer[] arr = { 1, 2, 3, 4, 5, 6, 7, 8 };            Octet<Integer, Integer, Integer, Integer, Integer, Integer, Integer> otherOctet             = Octet.fromArray(arr);            System.out.println(octet);         System.out.println(otherOctet);     } }

  Output:

  [1, 2, 3, 4, 5, 6, 7, 8]
  [1, 2, 3, 4, 5, 6, 7, 8]
  

Getting Value

The getValueX() method can be used to fetch the value in a Tuple at index X. The indexing in Tuples start with 0. Hence the value at index X represents the value at position X+1.

Syntax:

Octet<type1, type2, type3, type4, type5, type6, type7> octet = 
    new Octet<type1, type2, type3, type4, type5, type6, type7>
        (value1, value2, value3, value4, value5, value6, value7, value8);

type1 val1 = octet.getValue0();

Example:

Output:

1
3

Setting Octet Value

Since the Tuples are immutable, it means that modifying a value at an index is not possible. Hence JavaTuples offer setAtX(value) which creates a copy of the Tuple with a new value at index X, and returns that Tuple.

Syntax:

Octet<type1, type2, type3, type4, type5, type6, type7> octet = 
    new Octet<type1, type2, type3, type4, type5, type6, type7>
      (value1, value2, value3, value4, value5, value6, value7, value8);

Octet<type1, type2, type3, type4, type5, type6, type7> 
    otherOctet = octet.setAtX(value);

Example:

Output:

[1, 2, 3, 40, 5, 6, 7, 8]

Adding a value

Adding a value can be done with the help of addAtX() method, where X represent the index at which the value is to be added. This method returns a Tuple of element one more than the called Tuple.

Syntax:

Octet<type1, type2, type3, type4, type5, type6, type7> octet = 
    new Octet<type1, type2, type3, type4, type5, type6, type7>
        (value1, value2, value3, value4, value5, value6, value7, value8);

Octet<type 1, type 2, type 3, type 4, type 5, type 6, type 7> octet = 
    octet.addAtx(value);

Example:

Output:

[1, 2, 3, 4, 5, 6, 7, 8, 9]

Searching in Octet

An element can be searched in a tuple with the pre-defined method contains(). It returns a boolean value whether the value is present or not.

Syntax:

Octet<type1, type2, type3, type4, type5, type6, type7> octet = 
    new Octet<type1, type2, type3, type4, type5, type6, type7>
        (value1, value2, value3, value4, value5, value6, value7, value8);

boolean res = octet.contains(value2);

Example:

Output:

true
false

Iterating through Octet

Since Octet implement the Iterable<Object> interface. It means that they can be iterated in the same way as collections or arrays.

Syntax:

Octet<type1, type2, type3, type4, type5, type6, type7> octet = 
    new Octet<type1, type2, type3, type4, type5, type6, type7>
            (value1, value2, value3, value4, value5, value6, value7, value8);

for (Object item : octet) {
        ...
}

Example:

Output:

1
2
3
4
5
6
7
8

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