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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10.  
  11. 	private static int reverseBits(int value) {
  12. 	  return value ^ ((Integer.highestOneBit(value) << 1) - 1);
  13. 	}
  14.  
  15. 	private static void test(int testId, int input, int expected) {
  16. 		int actual = reverseBits(input);
  17. 	    if (expected == actual) {
  18. 	    	System.out.printf("Test %d OK%n", testId);
  19. 	    } else {
  20. 	    	System.out.printf("Test %d failed, expected: %d, actual: %d%n", testId, expected, actual);
  21. 	    }	
  22. 	}
  23.  
  24. 	public static void main (String[] args) throws java.lang.Exception
  25. 	{
  26. 		test(1, 10, 5);
  27. 		test(2, 0xf0, 0x0f);
  28. 		test(3, 0xff0, 0x00f);
  29. 		test(4, 1, 0);
  30. 		test(5, 2, 1);
  31. 		test(6, 8, 7);
  32. 	}
  33. }
Success #stdin #stdout 0.08s 48692KB
comments (?)
stdin
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Standard input is empty
stdout
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Test 1 OK
Test 2 OK
Test 3 OK
Test 4 OK
Test 5 OK
Test 6 OK
https://ideone.com/u7ZlIv
language:
Java (HotSpot 12)
created:
3 years ago
visibility:
public

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