java - How to add a method to Enumeration in Scala? -

in java could:

public enum enum {     1 {         public string method() {             return "1";         }     },     2 {         public string method() {             return "2";         }     },     3 {         public string method() {             return "3";         }     };      public abstract string method(); } 

how do in scala?

edit / useful links:

• https://github.com/rbricks/itemized
• http://pedrorijo.com/blog/scala-enums/

here example of adding attributes scala enums extending enumeration.val class.

object planet extends enumeration {     protected case class val(val mass: double, val radius: double) extends super.val {       def surfacegravity: double = planet.g * mass / (radius * radius)       def surfaceweight(othermass: double): double = othermass * surfacegravity     }     implicit def valuetoplanetval(x: value) = x.asinstanceof[val]      val g: double = 6.67300e-11     val mercury = val(3.303e+23, 2.4397e6)     val venus   = val(4.869e+24, 6.0518e6)     val earth   = val(5.976e+24, 6.37814e6)     val mars    = val(6.421e+23, 3.3972e6)     val jupiter = val(1.9e+27, 7.1492e7)     val saturn  = val(5.688e+26, 6.0268e7)     val uranus  = val(8.686e+25, 2.5559e7)     val neptune = val(1.024e+26, 2.4746e7)  }   scala> planet.values.filter(_.radius > 7.0e6)  res16: planet.valueset = planet.valueset(jupiter, saturn, uranus, neptune)