JAVA VS SCALA

JAVA VS SCALA

POJO IN JAVA VS SCALA

The Java version of a simple POJO:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

public class PostJ {     private String title;     private String text;     private String author;     public String getTitle() {         return title;     }     public void setTitle(String title) {         this.title = title;     }     public String getText() {         return text;     }     public void setText(String text) {         this.text = text;     }     public String getAuthor() {         return author;     }     public void setAuthor(String author) {         this.author = author;     } } And the Scala version. 1 case class Post(title: String, text: String, author: String)

Variables :

Java Syntax:
------------------

<data type>  <variable name> = <value> ;
   int                    a                    = 10;

   String               s                   = "Big Data";

Scala Syntax:
------------------

val <variable name> : <data type> = <value>
val            a                :  Int              = 10
val             s               :   String        = "Spark"

var is immutable.

NOTE: SCALA SUPPORTS " TYPE INFER"= automatically find the data type from value.
 val           a    = 10;
val            s=   "Spark"
var <variable name> : <data type> = <value>

var is mutable.