Java Tuples

- Java tuples is one of the simplest data structure.

- Java tuple data structure supports heterogenious objects.

javatuples offers you tuple classes from one to ten elements:

- Unit<A> (1 element)

- Pair<A,B> (2 elements)

- Triplet<A,B,C> (3 elements)

- Quartet<A,B,C,D> (4 elements)

- Quintet<A,B,C,D,E> (5 elements)

- Sextet<A,B,C,D,E,F> (6 elements)

- Septet<A,B,C,D,E,F,G> (7 elements)

- Octet<A,B,C,D,E,F,G,H> (8 elements)

- Ennead<A,B,C,D,E,F,G,H,I> (9 elements)

- Decade<A,B,C,D,E,F,G,H,I,J> (10 elements)

A couple of very common 2-element tuple classes equivalent to Pair, just for the sake of code semantics:

 - KeyValue<A,B>

 - LabelValue<A,B>

Java Tuple class are:

- Typesafe

- Immutable

- Iterable

- Serializable

- Comparable (implements Comparable<Tuple>)

- Implements equals(...) and hashCode()

- Implements toString()

Examples:

- Triplet<String,Integer,Double[]> triplet = Triplet.with(str, integ, doubleArray); 

- Quartet<String,Integer,Double[],Boolean> quartet = triplet.add(myBoolean);

- LabelValue<String,Operator> operatorLabelValue = new LabelValue<String,Operator>("<=", Operator.LESS_OR_EQUAL_TO);