java - How can I change enum value inside it scope -

this enum class

public enum turn{     beginuserturn,userturn,     beginenemyturn,enemyturn;      public void change(){         if(this==beginuserturn)this=beginenemyturn;         else this=beginuserturn;     } } 

and have turn valiable

turn turn; turn=turn.beginuserturn; 

i want change turn value user enemy's turn call

turn.change() 

but problem in enum class,line 6,7 , have error

the left-hand side of assignment must variable

you can't reassign this. keyword, not variable. maybe try this:

turn = turn.change(); 

and have change() return next turn:

public turn change() {     if (this==beginuserturn) return beginenemyturn;     else return beginuserturn; }