import java.io.*;
import java.lang.reflect.*;
import java.util.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone {
  static class TypeToken<T> {
    Type getType() {
      ParameterizedType t = (ParameterizedType) getClass().getGenericSuperclass();
      return t.getActualTypeArguments()[0];
    }
  }
 
  static <T> TypeToken<T> genericToken() {
  	return new TypeToken<T>() {};
  }
 
  public static void main(String[] args) {
    Collection<Integer> list = new ArrayList<>();
    System.out.println(list.getClass().getGenericInterfaces()[0]);
 
    TypeToken<Collection<Integer>> tt = new TypeToken<Collection<Integer>>() {};
 
    System.out.println(tt.getClass().getGenericSuperclass());
    System.out.println(tt.getType());
 
    TypeToken<Collection<Integer>> g = genericToken();
    System.out.println(g.getType());
  }
}
 

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