java.math.BigInteger.<init>()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.math.BigInteger.<init>()方法的一些代码示例，展示了BigInteger.<init>()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。BigInteger.<init>()方法的具体详情如下：
包路径：java.math.BigInteger
类名称：BigInteger
方法名：<init>

BigInteger.<init>介绍

[英]Constructs a random BigInteger instance in the range [0, which is probably prime. The probability that the returned BigInteger is prime is greater than 1 - 1/2certainty).

Note: the Random argument is ignored if bitLength >= 16, where this implementation will use OpenSSL's BN_generate_prime_ex as a source of cryptographically strong pseudo-random numbers.
[中]在[0]范围内构造一个随机BigInteger实例，该范围可能为素数。返回的BigInteger为素数的概率大于1-1/2确定性）。
注意：如果比特长度>=16，则忽略随机参数，其中此实现将使用OpenSSL的BN_generate_prime_ex作为加密强伪随机数的源。

代码示例

代码示例来源：origin: stackoverflow.com

import java.security.SecureRandom;
import java.math.BigInteger;

public final class SessionIdentifierGenerator {
 private SecureRandom random = new SecureRandom();

 public String nextSessionId() {
  return new BigInteger(130, random).toString(32);
 }
}

代码示例来源：origin: alibaba/druid

public static BigInteger castToBigInteger(Object val) {
  if (val == null) {
    return null;
  }
  if (val instanceof BigInteger) {
    return (BigInteger) val;
  }
  if (val instanceof String) {
    return new BigInteger((String) val);
  }
  return BigInteger.valueOf(((Number) val).longValue());
}

代码示例来源：origin: stackoverflow.com

BigInteger reallyBig = new BigInteger("1234567890123456890");
BigInteger notSoBig = new BigInteger("2743561234");
reallyBig = reallyBig.add(notSoBig);

代码示例来源：origin: stackoverflow.com

String plaintext = "your text here";
MessageDigest m = MessageDigest.getInstance("MD5");
m.reset();
m.update(plaintext.getBytes());
byte[] digest = m.digest();
BigInteger bigInt = new BigInteger(1,digest);
String hashtext = bigInt.toString(16);
// Now we need to zero pad it if you actually want the full 32 chars.
while(hashtext.length() < 32 ){
 hashtext = "0"+hashtext;
}

代码示例来源：origin: stackoverflow.com

BigInteger bi = new BigInteger("76292708057987193002565060032465481997");
System.out.println(bi.toString(16));

代码示例来源：origin: stackoverflow.com

byte[] array = new BigInteger("1111000011110001", 2).toByteArray();
byte[] secondArray = new BigInteger("1111000011110001", 2).toByteArray();
if (Arrays.equals(array, secondArray))
{
  System.out.println("Yup, they're the same!");
}

代码示例来源：origin: stackoverflow.com

return canonical(new BigInteger("" + numerator), new BigInteger("" + denominator), true);
return canonical(new BigInteger(numerator), new BigInteger(denominator), true);
  n += decimal;
BigInteger numerator = new BigInteger(n);
  denominator = BigInteger.TEN.pow(-exp);
} else {
  numerator = numerator.multiply(BigInteger.TEN.pow(exp));
  denominator = BigInteger.ONE;
} else {
  BigInteger i1 = numerator.multiply(o.denominator);
  BigInteger i2 = o.numerator.multiply(denominator);
  return i1.compareTo(i2); // expensive!
return isInteger() ? new BigDecimal(numerator) : new BigDecimal(numerator).divide(new BigDecimal(denominator), scale, roundingMode);
System.out.printf("%s.floatValue() = %,f%n", name, r.floatValue());
System.out.printf("%s.doubleValue() = %,f%n", name, r.doubleValue());
System.out.println();

代码示例来源：origin: spotbugs/spotbugs

@NoWarning("FS")
  public void valuesOtherThanInt() {
    System.out.println(String.format("%d%n%d", 42, (short) 42));
    System.out.println(String.format("%d%n", new BigInteger("42")));
    System.out.println(String.format("%f%n", new BigDecimal(42)));
  }
}

代码示例来源：origin: spotbugs/spotbugs

@ExpectWarning("RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE")
  void y() {
    BigInteger i = BigInteger.ZERO;

    if (i == null) {
      i = BigInteger.ONE;
    } else {
      i = BigInteger.TEN;
    }

    System.out.println(new BigInteger("1").add(i));

  }
}

代码示例来源：origin: prestodb/presto

public static Optional<BigDecimal> fromMetastoreDecimal(@Nullable Decimal decimal)
{
  if (decimal == null) {
    return Optional.empty();
  }
  return Optional.of(new BigDecimal(new BigInteger(decimal.getUnscaled()), decimal.getScale()));
}

代码示例来源：origin: web3j/web3j

BigInteger i = BigInteger.valueOf((long) recId / 2);
BigInteger x = sig.r.add(i.multiply(n));
BigInteger e = new BigInteger(1, message);
BigInteger srInv = rInv.multiply(sig.s).mod(n);
BigInteger eInvrInv = rInv.multiply(eInv).mod(n);
ECPoint q = ECAlgorithms.sumOfTwoMultiplies(CURVE.getG(), eInvrInv, R, srInv);
return new BigInteger(1, Arrays.copyOfRange(qBytes, 1, qBytes.length));

代码示例来源：origin: robovm/robovm

digestBI = new BigInteger(1, msgDigest.digest());
  k = new BigInteger(1, randomBytes);
  if (k.compareTo(q) != -1) {
    continue;
  s = k.modInverse(q).multiply(digestBI.add(x.multiply(r)).mod(q))
      .mod(q);

代码示例来源：origin: immutables/immutables

@Test
public void write() throws Exception {
 JsonObject obj = new JsonObject();
 BigInteger bigInteger = new BigInteger(Long.toString(Long.MAX_VALUE)).multiply(new BigInteger("128"));
 obj.addProperty("bigInteger", bigInteger);
 BigDecimal bigDecimal = new BigDecimal(Long.MAX_VALUE).multiply(new BigDecimal(1024));
 obj.addProperty("bigDecimal", bigDecimal);
 BsonDocument doc = Jsons.toBson(obj);
 check(doc.get("bigInteger").getBsonType()).is(BsonType.DECIMAL128);
 check(doc.get("bigInteger").asDecimal128().decimal128Value().bigDecimalValue().toBigInteger()).is(bigInteger);
 check(doc.get("bigDecimal").getBsonType()).is(BsonType.DECIMAL128);
 check(doc.get("bigDecimal").asDecimal128().decimal128Value().bigDecimalValue()).is(bigDecimal);
}

代码示例来源：origin: apache/storm

public void execute(Tuple input, BasicOutputCollector collector) {
  total = total.add(new BigInteger(input.getValues().get(1).toString()));
  collector.emit(tuple(total.toString()));
  //prints the total with low probability.
  if(RANDOM.nextInt(1000) > 995) {
    LOG.info("Running total = " + total);
  }
}

代码示例来源：origin: prestodb/presto

@Test
public void testGetRingFraction()
{
  assertEquals(tokenRing.getTokenCountInRange("0", "1"), ONE);
  assertEquals(tokenRing.getTokenCountInRange("0", "200"), new BigInteger("200"));
  assertEquals(tokenRing.getTokenCountInRange("0", "10"), new BigInteger("10"));
  assertEquals(tokenRing.getTokenCountInRange("1", "11"), new BigInteger("10"));
  assertEquals(tokenRing.getTokenCountInRange("0", "0"), ZERO);
  assertEquals(tokenRing.getTokenCountInRange("-1", "-1"), BigInteger.valueOf(2).pow(127).add(ONE));
  assertEquals(tokenRing.getTokenCountInRange("1", "0"), BigInteger.valueOf(2).pow(127));
}

代码示例来源：origin: SeanDragon/protools

/**
 * 判断生成的公钥是否合法
 *
 * @param publicKey
 * @return
 */
private boolean checkPublicKey(ECPoint publicKey) {
  if (!publicKey.isInfinity()) {
    BigInteger x = publicKey.getXCoord().toBigInteger();
    BigInteger y = publicKey.getYCoord().toBigInteger();
    if (between(x, new BigInteger("0"), p) && between(y, new BigInteger("0"), p)) {
      BigInteger xResult = x.pow(3).add(a.multiply(x)).add(b).mod(p);
      BigInteger yResult = y.pow(2).mod(p);
      return yResult.equals(xResult) && publicKey.multiply(n).isInfinity();
    }
  }
  return false;
}

代码示例来源：origin: Curzibn/Luban

@Override
 public String rename(String filePath) {
  try {
   MessageDigest md = MessageDigest.getInstance("MD5");
   md.update(filePath.getBytes());
   return new BigInteger(1, md.digest()).toString(32);
  } catch (NoSuchAlgorithmException e) {
   e.printStackTrace();
  }
  return "";
 }
})

代码示例来源：origin: aa112901/remusic

public static void main3(String[] args) {
  String key = "7b104953fb112826";
  String pubKey = "010001";
  String m = "157794750267131502212476817800345498121872783333389747424011531025366277535262539913701806290766479189477533597854989606803194253978660329941980786072432806427833685472618792592200595694346872951301770580765135349259590167490536138082469680638514416594216629258349130257685001248172188325316586707301643237607";
  try {
    String k = reverse(key);
    String keyTo16 = toHex(k, "GBK");
    // System.out.println(new BigInteger(keyTo16, 16));
    // new BigInteger(keyTo16, 16) 字符串转为16进制数字，
    // pow(Integer.valueOf(pubKey, 16)) 得到次方的值
    //remainder 取余数
    String c = (new BigInteger(keyTo16, 16).pow(Integer.valueOf(pubKey, 16))).remainder(new BigInteger(m)) + "";
    //转为16进制表示
    System.out.println(new BigInteger(c).toString(16));
  } catch (UnsupportedEncodingException e) {
    e.printStackTrace();
  }
}

代码示例来源：origin: stackoverflow.com

import java.math.*;

public class Test {
  public static void main(String[] args) {
    String hexStr = "1b0ee1e3";
    BigInteger bigInt = new BigInteger(hexStr, 16);
    System.out.println(bigInt); // Prints 453960163
  }
}

代码示例来源：origin: stackoverflow.com

BigInteger bi1 = new BigInteger("637824629384623845238423545642384"); 
BigInteger bi2 = new BigInteger("3039768898793547264523745379249934"); 

BigInteger bigSum = bi1.add(bi2);

BigInteger bigProduct = bi1.multiply(bi2);

System.out.println("Sum : " + bigSum);
System.out.println("Product : " + bigProduct);

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