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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12.  
  13.         Outer o = new Outer();
  14.         Outer.Inner inner = o.create();
  15.         inner.operate();
  16. 	}
  17. }
  18.  
  19. class Outer {
  20.  
  21.     public final class Inner {
  22.  
  23.         private final Outer outer;
  24.  
  25.         private Inner(Outer outer) {
  26.             this.outer = outer;
  27.         }
  28.  
  29.  
  30.         public void operate(){
  31.             outer.operateOn(this);
  32.         }
  33.     }
  34.  
  35.     Inner create() {
  36.         return new Inner(this);
  37.     }
  38.  
  39.     private void operateOn(Inner inner) {
  40.         System.out.println(inner);
  41.     }
  42. }
Success #stdin #stdout 0.07s 380224KB
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Outer$Inner@e51960
https://ideone.com/KPNbAQ
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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