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  1. import java.util.*;
  2. import java.lang.*;
  3.  
  4. class Main
  5. {
  6.  
  7.     public static void main (String[] args) throws java.lang.Exception
  8.     {
  9. 	    AParent aParent = new AParent();
  10.         aParent.doSomething();
  11.     }
  12.  
  13. }
  14.  
  15.  
  16. interface AHolder 
  17. {
  18.     void setA(A a);
  19. }
  20.  
  21. class AParent implements AHolder {
  22.  
  23.     private A a;
  24.  
  25.     public AParent() {
  26.         a = new A();
  27.     }
  28.  
  29.     public void doSomething() {
  30.         a.doStuffAndDisappear(this);
  31.         if(a == null)
  32.         {
  33.             System.out.println("It is true!");
  34.         }
  35.     }
  36.  
  37.     public void setA(A a) {
  38.         this.a = a;
  39.     }
  40. }
  41.  
  42. class A 
  43. {
  44.     void doStuffAndDisappear(AHolder parent) {
  45.         parent.setA(null);
  46.     }
  47. }
Success #stdin #stdout 0.07s 380224KB
comments (?)
stdin 
Standard input is empty
stdout 
It is true!
https://ideone.com/AxePWH
http://stackoverflow.com/questions/18293594/is-it-possible-to-set-an-object-to-be-null-from-within-itself
language:
Java (12.0.1)
created:
10 years ago
visibility:
public

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