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  1. import java.util.*;
  2.  
  3. class A {
  4. int value; 
  5. A(int value) { this.value = value; } 
  6. public int hashCode() { return value; } 
  7. }
  8.  
  9. class C { 
  10. public static void main(String[] args) {
  11. A a1 = new A(1); 
  12. A a2 = new A(1); 
  13. HashSet<A> set = new HashSet<>(); 
  14. set.add(a1); 
  15. set.add(a2); 
  16. System.out.println(set.size()); 
  17. } 
  18. }
Success #stdin #stdout 0.09s 27736KB
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https://ideone.com/pLN0jr
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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