Packages and Imports Tour of Scala
In Scala , packages are used to build namespaces which permits you to modularize programs.
Scala Packages are created by creating one or more package at the top of a Scala file.
use case 1:
Create package prwa and then class faculty
package prwa
class faculty {
def faculymethod(){}
}
Now create class student under same package prwa
package prwa
// using the prwa package name again
class student {
def studentmethod(){}
}
object Main
{
// Main method
def main(args: Array[String])
{
val stu= new student()
val fac= new faculty()
// faculty class can be accessed while
// in different file but in same package.
println("welcome to prwatech")
}
}
The directory structure looks like as below
prwa
+faculty.scala
+student.scala
output
The value of z after casting into Int is 0
use case 2:
package eduprwa
class Fruit {
def Fruitmethod(){}
}
Create another class under same package
package eduprwa
class FruitName {
def FruitNamemethod(){}
}
object Main
{
def main(args: Array[String])
{
val Fruit= new Fruit()
val FruiName= new FruitName()
// FruitName class can be accessed while
// in different file but in same package.
println("Mango is a Fruit")
}
}
output
Mango is a fruit
use case 3:
package prwatech
class Institute {
private var id=2
def method()
{
{
println("welcome to Data Science Training")
println("id="+id)
//
package tech
object Main {
def main(args: Array[String])
{
// importing in main method
import prwatech.Institute
// using the member injected using import statement
val obj = new Institute()
obj.method();
output
welcome to Data Science Training
id=2
Packages and Imports Tour of Scala
