读JDK源码

private static String toUnsignedString(int i, int shift) {
   char[] buf = new char[32];
   int charPos = 32;
   int radix = 1 << shift;
   int mask = radix - 1;
   do {
      buf[--charPos] = digits[i & mask];
      i >>>= shift;
   } while (i != 0);

    return new String(buf, charPos, (32 - charPos));
}

 

i = -1;

i = 1;见Java编程思想operators章节



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