Examples of java.math.BigInteger.bitLength()

java.math.BigInteger.bitLength()
Calculate bitlength of contents of the first len elements an int array, assuming there are no leading zero ints.

         *
         * To determine which side of logFloor.5 the logarithm is, we compare x^2 to 2^(2 *
         * logFloor + 1).
         */
        BigInteger x2 = x.pow(2);
        int logX2Floor = x2.bitLength() - 1;
        return (logX2Floor < 2 * logFloor + 1) ? logFloor : logFloor + 1;


      default:
        throw new AssertionError();
    }

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        } else {
            throw new Exception("Public exponent should be 3 or 65537 but is " +
                                pubexp.toString(10) + ".");
        }


        if (modulus.bitLength() != 2048) {
             throw new Exception("Modulus should be 2048 bits long but is " +
                        modulus.bitLength() + " bits.");
        }


        return version;

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                                pubexp.toString(10) + ".");
        }


        if (modulus.bitLength() != 2048) {
             throw new Exception("Modulus should be 2048 bits long but is " +
                        modulus.bitLength() + " bits.");
        }


        return version;
    }

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        BigInteger N = key.getModulus();


        StringBuilder result = new StringBuilder();


        int nwords = N.bitLength() / 32;    // # of 32 bit integers in modulus


        if (version > 1) {
            result.append("v");
            result.append(Integer.toString(version));
            result.append(" ");

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        }


        // Check bounds.
        if (!isLong) {
          if (isSigned) {
            if (bigValue.bitLength() > 31) {
              throw new NumberFormatException(
                "Number out of range for 32-bit signed integer: " + text);
            }
          } else {
            if (bigValue.bitLength() > 32) {

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            if (bigValue.bitLength() > 31) {
              throw new NumberFormatException(
                "Number out of range for 32-bit signed integer: " + text);
            }
          } else {
            if (bigValue.bitLength() > 32) {
              throw new NumberFormatException(
                "Number out of range for 32-bit unsigned integer: " + text);
            }
          }
        } else {

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                "Number out of range for 32-bit unsigned integer: " + text);
            }
          }
        } else {
          if (isSigned) {
            if (bigValue.bitLength() > 63) {
              throw new NumberFormatException(
                "Number out of range for 64-bit signed integer: " + text);
            }
          } else {
            if (bigValue.bitLength() > 64) {

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            if (bigValue.bitLength() > 63) {
              throw new NumberFormatException(
                "Number out of range for 64-bit signed integer: " + text);
            }
          } else {
            if (bigValue.bitLength() > 64) {
              throw new NumberFormatException(
                "Number out of range for 64-bit unsigned integer: " + text);
            }
          }
        }

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      }


      // Check bounds.
      if (!isLong) {
        if (isSigned) {
          if (bigValue.bitLength() > 31) {
            throw new NumberFormatException("Number out of range for 32-bit signed integer: "
                + text);
          }
        } else {
          if (bigValue.bitLength() > 32) {

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          if (bigValue.bitLength() > 31) {
            throw new NumberFormatException("Number out of range for 32-bit signed integer: "
                + text);
          }
        } else {
          if (bigValue.bitLength() > 32) {
            throw new NumberFormatException("Number out of range for 32-bit unsigned integer: "
                + text);
          }
        }
      } else {

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