Acces variables from an inner class in java

Question

I need to modify a variable from an inner class. The compiler says I need to declare the variable static, but then I can't modify it. The code is something like this: ``` public class Outter{ private boolean b; public Outter(){ b = false; new Inner(b); } } public class Inner{ public Inner(boolean b){ b = true; } } ``` Is there anything like the "extern" in C? Or any solution so I could modify the b variable? I've tried setting it to static and passing the whole Outter class as a parameter, but I keep having the same problem. EDIT: Well the code is more like: ``` public class MainView{ private boolean view; //JMenus,JMenuItems, JPanels.. declarations private JFrame frame MainView(){ view = true; //initializations create_listeners(); } public void create_listeners(){ Menu.addActionListener( new ActionListener() { public void actionPerformed(ActionEvent event){ if(View){ new View2(frame); View = false; } } } ); } } public class View2{ private JButton back = new JButton("Back"); public Vi…

Accepted Answer

The syntax is as follows, you obtain the reference to the outer class using Outter.this

```
public class Outter{
   private boolean b;

class Inner{
       public Inner(boolean b){
          Outter.this.b = true;
       }
   }
}
```

Edit: It looks to me that you are trying to modify b just by passing a reference. In java this is not possible. Variables are passed as arguments by copy of reference variable (a reference variable is something like a pointer) or, in case of primitives, by copy.

Acces variables from an inner class in java

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