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I must have missed something obvious, but how do you create a scala-tuple in Java.
I have a scala interface that is implemented in java (for now) and includes the return of a tuple, but how do I implement it?
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In Scala, a tuple is a value that contains a fixed number of elements, each with its own type. Tuples are immutable. Tuples are especially handy for returning multiple values from a method. A tuple with two elements can be created as follows: Scala 2 and 3.
In Java, a tuple is a generic data structure that treats each element as an object, and these objects stores in a separate byte array. In other words, we can also say that tuple is an ordered collection of objects of different types.
One of the most important differences between a list and a tuple is that list is mutable, whereas a tuple is immutable.
A tuple is only syntactic sugar for the class Tuple2:
new Tuple2<String, String>("foo", "bar");
will do the trick in Java.
scala> ("foo", "bar")
res0: (java.lang.String, java.lang.String) = (foo,bar)
scala> new Tuple2[String, String]("foo", "bar")
res1: (String, String) = (foo,bar)
scala> ("foo", "bar").getClass.getName
res3: java.lang.String = scala.Tuple2
There are similar Tuple3 ... Tuple22 classes.
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