fork(1) download
copy 
  1. import java.util.ArrayList;
  2. import java.util.Arrays;
  3. import java.util.Collection;
  4. import java.util.List;
  5.  
  6. interface Callback<T> {
  7.     void call(T t);
  8. }
  9.  
  10. class ConcreteCallback implements Callback<Collection<Object>> {
  11.     public void call(final Collection<Object> data) {
  12.         for (Object obj: data) {
  13.             System.out.println(obj);
  14.         }
  15.     }
  16. }
  17.  
  18. public class Main {
  19.     private static <T, U extends T> void call(final List<U> data, final Callback<? super List<T>> cb) {
  20.         ArrayList<T> dat = new ArrayList<>();
  21.         for (T object: data) {
  22.             dat.add(object);
  23.         }
  24.         cb.call(dat);
  25.     }
  26.  
  27.     public static void main(final String[] args) {
  28.         call(Arrays.asList(args), new ConcreteCallback()); 
  29.     }
  30. }
Success #stdin #stdout 0.07s 380224KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/WN1qui
language:
Java (12.0.1)
created:
9 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!