fork download 
  1. import java.lang.reflect.Field;
  2. import java.lang.reflect.InvocationTargetException;
  3. import java.lang.reflect.Method;
  4.  
  5. public class Main {
  6.  
  7.     public static void main(String[] args) {
  8.         One one = new One();
  9.         Class<?> clazz = one.getClass();
  10.         try {
  11.             Field twoField = clazz.getField("two");
  12.             twoField.setAccessible(true);
  13.             Class<?> twoClazz =Class.forName(twoField.getType().getName());
  14.  
  15.             Method method = twoClazz.getMethod("hello", null);
  16.  
  17.             method.invoke(twoClazz.newInstance(), null);
  18.         } catch (NoSuchFieldException | IllegalAccessException | InvocationTargetException | NoSuchMethodException | ClassNotFoundException | InstantiationException e) {
  19.             e.printStackTrace();
  20.         }
  21.     }
  22.  
  23.  
  24.     public static class One {
  25.         public Two two = new Two();
  26.     }
  27.  
  28.     public static class Two {
  29.         public void hello(){
  30.             System.out.println("hello");
  31.         }
  32.     }
  33. }
Success #stdin #stdout 0.1s 320512KB
comments (?)
stdin 
Standard input is empty
stdout 
hello
https://ideone.com/XUqCR7
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!