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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.util.Optional;
  7. import java.util.function.Consumer;
  8.  
  9. /* Name of the class has to be "Main" only if the class is public. */
  10. class A {
  11.     private void setter(final Number value) { }
  12.     private <T> void setter(final Optional<? super T> value) { }
  13.     private void setter2(final Optional<Number> value) { }
  14.  
  15.     private <T> void useSetter(final Consumer<Optional<T>> a) { }
  16.  
  17.     private void callMethod() {
  18.         useSetter(this::setter); // Error here
  19.         useSetter(this::setter2);
  20.     }
  21.  
  22.     public static void main(String [] args){
  23.  
  24.     }
  25. }
  26.  
  27. class B {
  28.     private void setter(final Number value) { }
  29.     private void setter(final Optional<? super Number> value) { }
  30.     private void setter2(final Optional<Number> value) { }
  31.  
  32.     private <T> void useSetter(final Consumer<Optional<T>> a) { }
  33.  
  34.     private void callMethod() {
  35.         useSetter(this::setter); // Error here
  36.         useSetter(this::setter2);
  37.     }
  38.  
  39.     public static void main(String [] args){
  40.  
  41.     }
  42. }
Success #stdin #stdout 0.04s 4386816KB
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https://ideone.com/JScUFm
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
secret

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