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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 First
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		System.out.println(hitungNomorBit(13, 0));
  13.         System.out.println(hitungNomorBit(13, 1));
  14.         System.out.println(hitungNomorBit(13, 2));
  15.         System.out.println(hitungNomorBit(13, 3));
  16. 	}
  17.  
  18. 	public static Integer hitungNomorBit(int angka, int nomorBit) {
  19. 		if (nomorBit != 0 && nomorBit != 1) {
  20. 			return null;
  21. 		}
  22.  
  23. 		Integer answer = 0;
  24.  
  25. 		if (angka == 0) {
  26. 			return nomorBit == 0 ? 1 : 0;
  27. 		}
  28.  
  29. 		while (angka != 0) {
  30. 			if ((angka & 1) == nomorBit) {
  31. 				answer += 1;
  32. 			}
  33.  
  34. 			angka = angka >>> 1;
  35.  
  36. 		}
  37.  
  38. 		return answer;
  39.  
  40. 	}
  41. }
Success #stdin #stdout 0.1s 54564KB
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https://ideone.com/2AD0mR
language:
Java (HotSpot 12)
created:
10 days ago
visibility:
public

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