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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone
  6. {
  7.     static <T> int firstNotNullIndex(T[] arr) {
  8.         for (int i = 0; i < arr.length; ++i)
  9.             if (arr[i] != null)
  10.                 return i;
  11.  
  12.         // или `return -1`
  13.         return arr.length;
  14.     }
  15.  
  16. 	public static void main (String[] args) throws java.lang.Exception
  17. 	{
  18. 		String[] array1 = {null, null, "a", "b"};
  19. 		System.out.println(firstNotNullIndex(array1));
  20.  
  21. 		String[] array2 = {"a", "b"};
  22. 		System.out.println(firstNotNullIndex(array2));
  23.  
  24. 		String[] array3 = {null, null, null, null};
  25. 		System.out.println(firstNotNullIndex(array3));
  26.  
  27. 		String[] array4 = {};
  28. 		System.out.println(firstNotNullIndex(array4));
  29. 	}
  30. }
Success #stdin #stdout 0.06s 2841600KB
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https://ideone.com/YKrTqw
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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