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  1. import java.util.Random;
  2.  
  3. /*
  4. プログラミングのお題スレ Part15 
  5. //mevius.5ch.net/test/read.cgi/tech/1564310397/257
  6.  
  7. 257 名前：デフォルトの名無しさん[sage] 投稿日：2019/09/01(日) 18:40:58.06 ID:lGQcNl0x
  8. お題: nバイトのデータxをビット列にして出力しなさい
  9.  */
  10. class Ideone
  11. {
  12.     public static void main(String[] args)
  13.     {
  14.         int n = 24;
  15.         byte[] x = generateData(n);
  16.         System.out.printf("0x%s: %s%n", toHexString(x), toBinaryString(x));
  17.     }
  18.  
  19.     // nバイトのランダムなデータを作る
  20.     static byte[] generateData(int n)
  21.     {
  22.         byte[] temp = new byte[n];
  23.         new Random().nextBytes(temp);
  24.         return temp;
  25.     }
  26.  
  27.     static String toBinaryString(byte[] bytes)
  28.     {
  29.         StringBuilder sb = new StringBuilder(bytes.length * 8);
  30.         for (byte b : bytes)
  31.             for (int i = 7; i >= 0; i--)
  32.                 sb.append(b >>> i & 1);
  33.         return sb.toString();
  34.     }
  35.  
  36.     static String toHexString(byte[] bytes)
  37.     {
  38.         StringBuilder sb = new StringBuilder(bytes.length * 2);
  39.         for (byte b : bytes)
  40.             sb.append(Integer.toHexString(b & 0xFF));
  41.         return sb.toString();
  42.     }
  43. }
  44.  
Success #stdin #stdout 0.08s 33960KB
comments (?)
stdin 
Standard input is empty
stdout 
0x4cd72de1891bc91e98eca5512b96145516711cae31aeb8a: 010011001101011100101101111000011000100100011011110010010001111010011000111011001010010100000101000100101011100101100001010001010101000101100111000100011100101011100011000110101110101110001010
https://ideone.com/4I2YQt
プログラミングのお題スレ15の257
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
secret

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