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  1. public class Main {
  2.  
  3.     public interface IBar<T> {
  4.       public void start(Foo<T> foo);
  5.     }
  6.  
  7.     public static class Bar<T> implements IBar<T> {
  8.  
  9.       public void start(final Foo<T> foo) {
  10.         new Thread() {
  11.             @Override
  12.             public void run() {
  13.               while (true) {
  14.                 T baz = foo.getT();
  15.                 //do something with the T baz object
  16.                 foo.callBack();
  17.               }
  18.             }
  19.         }.start();
  20.       }
  21.  
  22.     }
  23.  
  24.     public static class Foo<T> {
  25.       private T baz;
  26.       private Bar<T> bar;
  27.  
  28.       public Foo(T baz, Bar<T> bar) {
  29.         this.baz = baz;
  30.         this.bar = bar;
  31.       }
  32.  
  33.       public void startBar() {
  34.         bar.start(this); // totally possible
  35.       }
  36.  
  37.       public T getT() {
  38.         return baz;
  39.       }
  40.  
  41.       public void callBack() {
  42.         System.out.println("called back");
  43.       }
  44.     }
  45.  
  46.     public static void main(String[] a) {
  47.         System.out.println("compiled and ran");
  48.     }
  49. }
Success #stdin #stdout 0.06s 380160KB
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Standard input is empty
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compiled and ran
https://ideone.com/4ylIKt
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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