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  1.  
  2. class HumanReadable {
  3.  
  4.     public static String humanReadableByteCount(final long bytes,final boolean si)
  5.       {
  6.       final int unit=si ? 1000 : 1024;
  7.       if(bytes<unit)
  8.         return bytes+" B";
  9.       double result=bytes;
  10.       final String unitsToUse=si ? "kMGTPE" : "KMGTPE";
  11.       int i=0;
  12.       final int unitsCount=unitsToUse.length();
  13.       for(;i<unitsCount-1;++i)
  14.         {
  15.         result/=unit;
  16.         if(result<unit)
  17.           break;
  18.         }
  19.       final StringBuilder sb=new StringBuilder(9);
  20.       sb.append(String.format("%.1f ",result));
  21.       sb.append(unitsToUse.charAt(i));
  22.       if(si)
  23.         sb.append('B');
  24.       else sb.append('i').append('B');
  25.       final String resultStr=sb.toString();
  26.       return resultStr;
  27.       }
  28.  
  29.     public static void main(String[] args) {
  30.         System.out.println(humanReadableByteCount(999999999999999935L, true));
  31.         System.out.println(humanReadableByteCount(999999999999999936L, true));
  32.     }
  33.  
  34. }
  35.  
Success #stdin #stdout 0.08s 380160KB
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Standard input is empty
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1000.0 PB
1000.0 EB
https://ideone.com/6AlI3G
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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