What is the equivalent of Java static methods in Kotlin?

Question

There is no static keyword in Kotlin.

What is the best way to represent a static Java method in Kotlin?

Answer 1

You can achieve the static functionality in Kotlin by Companion Objects

• Adding companion to the object declaration allows for adding the static functionality to an object even though the actual static concept does not exist in Kotlin.
• A companion object can access all members of the class too, including the private constructors.
• A companion object is initialized when the class is instantiated.

• A companion object cannot be declared outside the class.

  class MyClass{
  
      companion object {
  
          val staticField = "This is an example of static field Object Decleration"
  
          fun getStaticFunction(): String {
              return "This is example of static function for Object Decleration"
          }
  
      }
  }
  

Members of the companion object can be called by using simply the class name as the qualifier:

Output:

MyClass.staticField // This is an example of static field Object Decleration

MyClass.getStaticFunction() : // This is an example of static function for Object Decleration