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  1. import java.util.Arrays;
  2.  
  3.  
  4. 	class Test056 {
  5.  
  6. 		public static void main(String[] args) {
  7.  
  8. 			String[] arrNull = new String[10000];
  9. 			String[] arrString = new String[10000];
  10.  
  11. 			long t1 = System.nanoTime();
  12.  
  13. 			for (int i=0; i<10000; i++){
  14. 				System.arraycopy(arrNull, 0, arrString, 0, arrNull.length);
  15. 			}
  16.  
  17. 			long t2 = System.nanoTime();
  18.  
  19. 			System.out.println(t2 - t1);
  20.  
  21. 			long t3 = System.nanoTime();
  22.  
  23. 			for (int i=0; i<10000; i++){
  24. 				Arrays.fill(arrString, null);
  25. 			}
  26.  
  27. 			long t4 = System.nanoTime();
  28.  
  29. 			System.out.println(t4 - t3);
  30.  
  31. 			long t5 = System.nanoTime();
  32.  
  33. 			String[] newArray = new String[10000];
  34.  
  35. 			long t6 = System.nanoTime();
  36.  
  37. 			System.out.println(t6 - t5);
  38.  
  39. 			long t7 = System.nanoTime();
  40.  
  41. 			arrNull = newArray;
  42.  
  43. 			long t8 = System.nanoTime();
  44.  
  45. 			System.out.println(t8 - t7);
  46.  
  47.  
  48. 		}
  49.  
  50. 	}
Success #stdin #stdout 0.34s 380224KB
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42712802
226833042
32671
293
https://ideone.com/a276aV
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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