Home » Scala

Scala - Difference between Object and Case Object

By IncludeHelp Last updated : October 26, 2024

Scala Object

An object is an instance of a class, it can also be seen as a class that has only a single instance. Like class, you can create fields and methods for object too. Example,

Syntax

object Myclass{
    def add();
}

Scala Case Object

case object is just like an object but with some added features and attributes. It can be seen as a blend of case class ( the defined for adapting to changes) and object. It is created with a modifier case. Example,

Syntax

case object a {
    //definition. 
}

Difference between Object and Case Object

The following are the key differences between Object and Case Object in Scala:

Feature	Object	Case Object
Hash Code	No default hashCode implementation	Has a default hashCode implementation
Serialization	Not serializable by default	Serializable by default
Pattern Matching	Limited compatibility with pattern matching	Fully compatible with pattern matching in Scala
toString Method	Standard toString method, not customized by default	Customized toString method by default for improved readability
Usage Purpose	Used for single-instance objects without special features	Specially designed to offer additional features for immutability, serialization, and pattern matching