java - Scala scope, initialization -

imagine following java class:

class test {     private button b;     private table t;      public test()     {         setupbutton();         setuptable();     }      private void setupbutton()     {                     b = ...         b.doawesomestuff();         // ... more stuff going on     }      private void setuptable()     {                     t = ...         t.attach(b); // works, because b in (class) scope     } } 

the same code in scala:

class test() {     setupbutton();     setuptable();      private def setupbutton(): unit =     {         val button: button = ...     }      private def setuptable(): unit =     {         val table: table = ...         table.attach(button) // <--- error, because button not in scope,     } } 

now, of course there solutions this.

one being "use vars":

class test {     private var b: button = _     private var t: table = _      // ... rest works now, because b , t in scope, vars, not necessary } 

another 1 being "put in 1 method", merge setupbutton() , setuptable(). nogo if stuff going on in these methods bit more complex tho.

another 1 give methods parameters like:

private void setuptable(b: button) {...} 

all of proposed solutions seem inappropriate, first (why use var, if need val?) , second in cases. thirds leads unnecessary code there scope need there.

i'm sure come multiple other solutions, ask you: in such case?

refactor setupxxx method , return created component:

val button = setupbutton() val table = setuptable() 

or without auxiliary methods:

val button = { // setup button } val table = {  // setup table }