Introduction to Traits in Scala
Traits in Scala is same as interfaces in Java. But traits are more powerful than the interface in Java because traits permits to allow members implementation. Traits can have methods(abstract and non-abstract both), and fields as its individuals.
use case 1:
scala> trait PrwatechIterator[X] {
def hasNext: Boolean
def next(): X
}
trait PrwatechIterator
scala> class IntIterator(to: Int) extends PrwatechIterator[Int] {
private var current = 1
override def hasNext: Boolean = current < to
override def next(): Int = {
if (hasNext) {
val t = current
current += 2
t
class IntIterator
scala> val iterator = new IntIterator(5)
2scala> iterator.next()
scala> iterator.next()
use case 2:
scala> trait Prwatech {
| val name: String
| }
trait Prwatech
scala> class BigData(val name: String) extends Prwatech
2scala> class DataScience(val name: String) extends Prwatech
scala> val DataScience = new DataScience(“MachineLearning”)
3scala> val BigData = new BigData(“Hadoop”)
scala> val course = ArrayBuffer.empty[Prwatech
4scala> course.append(DataScience)
scala> course.append(BigData)
5scala> course.foreach(Prwatech => println(Prwatech.name))
use case 3:
scala> trait Prwatech {
| val name: String
|
trait Prwatech
scala> class Linux(val name: String) extends Prwatech
scala> class Python(val name: String) extends Prwatech
2scala> val Python = new Python(“Programming Language”)
scala> val Linux = new Linux(“Operating System”)
4scala> val prwa = ArrayBuffer.empty[Prwatech]
scala> prwa.append(Python)
6scala> prwa.append(Linux)
scala> prwa.foreach(Prwatech => println(Prwatech.name))
Introduction to Traits in Scala
