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  1. import java.util.*;
  2.  
  3. class Example {
  4.     public static void main(String[] args) {
  5.         Map<Double, String> m = new HashMap<>();
  6.         m.put(Double.NaN, "a");
  7.         m.put(Double.NaN, "b");
  8.         System.out.println(m.size());
  9.     }
  10. }
Success #stdin #stdout 0.1s 320320KB
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https://ideone.com/f0ufkb
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
secret

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