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  1. import java.io.IOException;
  2. import java.io.UnsupportedEncodingException;
  3.  
  4. interface Callback<E extends Exception> {
  5.     void call() throws E;
  6. }
  7.  
  8. class DuplexCallback<E extends Exception> implements Callback<E> {
  9.     private final Callback<? extends E> first;
  10.     private final Callback<? extends E> second;
  11.  
  12.     public DuplexCallback(
  13.         final Callback<? extends E> first,
  14.         final Callback<? extends E> second)
  15.     {
  16.         this.first = first;
  17.         this.second = second;
  18.     }
  19.  
  20.     public void call() throws E {
  21.         first.call();
  22.         second.call();
  23.     }
  24. }
  25.  
  26. class RuntimeExceptionAdapterCallback<E extends Exception>
  27.     implements Callback<E>
  28. {
  29.     private final Callback<? extends RuntimeException> callback;
  30.  
  31.     public RuntimeExceptionAdapterCallback(
  32.         final Callback<? extends RuntimeException> callback)
  33.     {
  34.         this.callback = callback;
  35.     }
  36.  
  37.     public void call() {
  38.         callback.call();
  39.     }
  40. }
  41.  
  42. class LoggingCallback implements Callback<RuntimeException> {
  43.     public void call() {
  44.         System.out.println("call() called");
  45.     }
  46. }
  47.  
  48. class BytesLoggingCallback implements Callback<UnsupportedEncodingException> {
  49.     private final byte[] bytes;
  50.  
  51.     public BytesLoggingCallback(final byte[] bytes) {
  52.         this.bytes = bytes;
  53.     }
  54.  
  55.     public void call() throws UnsupportedEncodingException {
  56.         System.out.println(new String(bytes, "utf-8"));
  57.     }
  58. }
  59.  
  60. public class Main {
  61.     public static void main(final String[] args) throws Exception {
  62.         Callback<IOException> callback =
  63.             new DuplexCallback<>(
  64.                 new RuntimeExceptionAdapterCallback<IOException>(
  65.                     new LoggingCallback()),
  66.                 new BytesLoggingCallback(new byte[]{65}));
  67.         callback.call();
  68.     }
  69. }
  70.  
Success #stdin #stdout 0.07s 380160KB
comments (?)
stdin
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Standard input is empty
stdout
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call() called
A
https://ideone.com/MB7biY
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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