Guide to Inheritance in Scala
Types of Inheritance:
· Single Level Inheritance
·Multi-level Inheritance
· Hierarchical Inheritance
· Multiple Inheritance: It cannot be achieved by Classes. It can be achieved by using Traits.
Note: Two Classes cannot be extended by one class at the same time.
· Hybrid Inheritance
An Example program to portray Single level inheritance:
package single
class single_lvl {
val prop:Double = 3000.00
protected var area_house:Double = 2000.00
def house() : Unit = {
println(“Villa is built over ” + area_house + ” sq ft.”)
}
}
class Child_A extends single_lvl{
def child_house() : Unit = {
println(“Child house is built in area of ” + (prop-area_house) + ” sq ft.”)
}
}
object SCA{
def main(args: Array[String]): Unit = {
val c = new Child_A()
c.child_house()
c.house()
println(“Single Inheritance Implemented”)
}
}
An Example program to portray Multi level inheritance:
package inheritence
class Multi_lvl {
def run(): Unit = {
println(“Running everyday 3kms is good for health”)
}
}
class AM extends Multi_lvl{
def walk(): Unit = {
println(“Walking Early Morning leads to Healtier life”)
}
}
class BM extends AM{
println(“Both parent and grand-parent method can be accese from here”)
}
object ABM{
def main(args:Array[String]):Unit = {
val b = new BM()
b.walk()
b.run()
}
}
