Scala getters and setters in Java class -

i create java class follows scala setters/getters convention.

i tried following simple class, not work:

public class javaa { private int = 0;  public int a() {     return a; }  public void a_$eq(int a) {     this.a = a; } } 

but when try access scala:

val x = new javaa x.a = 1 

and "reassignment val" error message. tried this, issues found other way around scala java.

what right way it?

thanks!

you can sort of this, , it's hard enough don't want to.

what can't write bare java class magically interpreted scala getters , setters. reason scala embeds information class file requires getters , setters (e.g. there 0 parameter blocks or 1 empty parameter block--a distinction not preserved on jvm (or in java)).

what can use java implement scala-defined interface (i.e. trait):

// getseta.scala trait getseta { def a: int; def a_=(a: int): unit }  // javausesgsa.java public class javausesgsa implements getseta {   private int = 0;   public int a() { return a; }   public void a_$eq(int a) { this.a = a; } } 

what can't do, so, use class directly (again because java not add appropriate annotation information scala):

scala> j.a = 5 <console>:8: error: reassignment val        j.a = 5 

but since does implement trait successfully, can use desired when typed trait:

scala> (j: getseta).a = 5 (j: getseta).a: int = 5 

so it's rather mixed bag. not perfect means, may sufficiently functional out in cases.

(the other alternative, of course, provide implicit conversion java class 1 has getter/setter references real methods on java class; works when can't have java inherit scala.)

(edit: of course there's no critical reason compiler must act way; 1 argue interpreting java-defined getter/setter pairs if scala ones (i.e. if classfile not explicitly it's scala) candidate feature enhancement improve java interoperability.)