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  1. import java.util.Date;
  2. import java.util.Arrays;
  3.  
  4. class Test
  5. {
  6. 	public static void main (String[] args) throws java.lang.Exception
  7. 	{
  8. 		int counter = 0;
  9. 		Date[] dates = new Date[100];
  10. 		for (int i = 0; i < dates.length; i++)
  11. 			dates[i] = new Date() {
  12. 				public int compareTo(Date other) {
  13. 					counter++; // Error
  14. 					return super.compareTo(other);
  15. 				}
  16.     	};
  17. 		Arrays.sort(dates);
  18. 		System.out.println(counter + " comparisons.");
  19. 	}
  20. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:13: error: local variables referenced from an inner class must be final or effectively final
					counter++; // Error
					^
1 error
stdout
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Standard output is empty
https://ideone.com/YRFLKN
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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