Example usage for java.math BigInteger valueOf

Introduction

In this page you can find the example usage for java.math BigInteger valueOf.

Prototype

private static BigInteger valueOf(int val[]) 

Source Link

Document

Returns a BigInteger with the given two's complement representation.

Usage

From source file:eu.operando.operandoapp.wifi.model.WiFiUtils.java

public static String convertIpAddress(int ipAddress) {
    byte[] bytes = BigInteger.valueOf(ipAddress).toByteArray();
    ArrayUtils.reverse(bytes);//  w  w w .j  a v  a2  s.  c o  m
    try {
        return InetAddress.getByAddress(bytes).getHostAddress();
    } catch (UnknownHostException e) {
        return StringUtils.EMPTY;
    }
}

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From source file:MainClass.java

public static X509Certificate generateV1Certificate(KeyPair pair)
        throws InvalidKeyException, NoSuchProviderException, SignatureException {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    X509V1CertificateGenerator certGen = new X509V1CertificateGenerator();

    certGen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis()));
    certGen.setIssuerDN(new X500Principal("CN=Test Certificate"));
    certGen.setNotBefore(new Date(System.currentTimeMillis() - 10000));
    certGen.setNotAfter(new Date(System.currentTimeMillis() + 10000));
    certGen.setSubjectDN(new X500Principal("CN=Test Certificate"));
    certGen.setPublicKey(pair.getPublic());
    certGen.setSignatureAlgorithm("SHA256WithRSAEncryption");

    return certGen.generateX509Certificate(pair.getPrivate(), "BC");
}

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From source file:cherry.foundation.crypto.SecureBigIntegerEncoderTest.java

@Test
public void testEncodeDecode() throws Exception {
    SecureBigIntegerEncoder encoder = createSecureBigIntegerEncoder();
    for (int i = 0; i < 100; i++) {
        BigInteger plain = BigInteger.valueOf(random.nextLong());
        String crypto = encoder.encode(plain);
        assertThat(crypto, is(not(plain.toString())));
        assertThat(encoder.decode(crypto), is(plain));
    }//from w  w w.j av a  2  s.c om
}

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From source file:com.spotify.hdfs2cass.CassandraPartitionerTest.java

@Test
public void testGetPartition() throws Exception {
    final int maxNodes = 5;

    final List<String> tokenRanges = new ArrayList<String>();

    BigInteger start = BigInteger.ZERO;
    BigInteger step = RandomPartitioner.MAXIMUM.divide(BigInteger.valueOf(maxNodes));
    for (int i = 0; i < maxNodes - 1; i++) {
        BigInteger end = start.add(step);

        tokenRanges.add(String.format("%d:%d", start, end));
        start = end.add(BigInteger.ONE);
    }// w  ww  .  j  a  va 2s .c o  m

    tokenRanges.add(String.format("%d:0", start));

    final JobConf conf = new JobConf();
    conf.set(ClusterInfo.SPOTIFY_CASSANDRA_TOKENS_PARAM, StringUtils.join(tokenRanges, ","));
    conf.set(ClusterInfo.SPOTIFY_CASSANDRA_PARTITIONER_PARAM, "org.apache.cassandra.dht.RandomPartitioner");

    CassandraPartitioner instance = new CassandraPartitioner();
    instance.configure(conf);

    Text key = new Text("foobar");
    assertEquals(2, instance.getPartition(key, null, 5));

    key = new Text("someotherkey");
    assertEquals(1, instance.getPartition(key, null, 5));

    key = new Text("1ce5cf4b861941f4aa799ae39ac9daa4");
    assertEquals(4, instance.getPartition(key, null, 5));
}

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From source file:co.rsk.peg.BridgeSerializationUtils.java

public static byte[] serializePairMap(SortedMap<Sha3Hash, Pair<BtcTransaction, Long>> map) {
    int ntxs = map.size();

    byte[][] bytes = new byte[ntxs * 3][];
    int n = 0;/* w  w  w. ja  v a  2s. c om*/

    for (Map.Entry<Sha3Hash, Pair<BtcTransaction, Long>> entry : map.entrySet()) {
        bytes[n++] = RLP.encodeElement(entry.getKey().getBytes());
        bytes[n++] = RLP.encodeElement(entry.getValue().getLeft().bitcoinSerialize());
        bytes[n++] = RLP.encodeBigInteger(BigInteger.valueOf(entry.getValue().getRight()));
    }

    return RLP.encodeList(bytes);
}

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From source file:com.netflix.imfutility.ConversionHelperTest.java

@Test
public void editUnitsToTimecode() {
    assertEquals("01:23:35.080",
            ConversionHelper.editUnitToTimecode(BigInteger.valueOf(125377), new BigFraction(25)));
    assertEquals("00:00:00.000",
            ConversionHelper.editUnitToTimecode(BigInteger.valueOf(0), new BigFraction(25)));
    assertEquals("00:00:02.000",
            ConversionHelper.editUnitToTimecode(BigInteger.valueOf(100), new BigFraction(50)));
    assertEquals("00:00:00.200",
            ConversionHelper.editUnitToTimecode(BigInteger.valueOf(10), new BigFraction(50)));
}

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From source file:jp.co.ntts.vhut.util.MacConversionUtil.java

/**
 * ?????????.//w  w w .j a va2  s.c om
 * @param macStart .
 * @param count ?
 * @return 
 */
public static byte[] getMacAddressWithOrderAsByte(String macStart, int count) {
    BigInteger biMacStart = new BigInteger(addrToByte(macStart));
    BigInteger biSub = BigInteger.valueOf(count);
    byte[] bMacTarget = biMacStart.add(biSub).toByteArray();
    byte[] result = new byte[6];
    int delta = 6 - bMacTarget.length;
    for (int i = 0; i < 6; i++) {
        if (i >= delta) {
            result[i] = bMacTarget[i - delta];
        } else {
            result[i] = (byte) 0;
        }
    }
    return result;
}

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From source file:cherry.foundation.type.converter.SecureBigIntegerConverterTest.java

@Test
public void testConvert() {
    for (int i = 0; i < 100; i++) {
        BigInteger plain = BigInteger.valueOf(random.nextLong());
        String crypto = SecureBigInteger.plainValueOf(plain).crypto();
        assertThat(cs.convert(crypto, SecureBigInteger.class).plain(), is(plain));
    }//from   w ww  .  j  av a 2s  . c o  m
}

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From source file:NumberUtils.java

/**
 * Convert the given number into an instance of the given target class.
 *
 * @param number      the number to convert
 * @param targetClass the target class to convert to
 * @return the converted number/*ww w  . j a v  a2 s. c o  m*/
 * @throws IllegalArgumentException if the target class is not supported
 *                                  (i.e. not a standard Number subclass as included in the JDK)
 * @see java.lang.Byte
 * @see java.lang.Short
 * @see java.lang.Integer
 * @see java.lang.Long
 * @see java.math.BigInteger
 * @see java.lang.Float
 * @see java.lang.Double
 * @see java.math.BigDecimal
 */
public static Number convertNumberToTargetClass(Number number, Class targetClass)
        throws IllegalArgumentException {

    if (targetClass.isInstance(number)) {
        return number;
    } else if (targetClass.equals(Byte.class)) {
        long value = number.longValue();
        if (value < Byte.MIN_VALUE || value > Byte.MAX_VALUE) {
            raiseOverflowException(number, targetClass);
        }
        return number.byteValue();
    } else if (targetClass.equals(Short.class)) {
        long value = number.longValue();
        if (value < Short.MIN_VALUE || value > Short.MAX_VALUE) {
            raiseOverflowException(number, targetClass);
        }
        return number.shortValue();
    } else if (targetClass.equals(Integer.class)) {
        long value = number.longValue();
        if (value < Integer.MIN_VALUE || value > Integer.MAX_VALUE) {
            raiseOverflowException(number, targetClass);
        }
        return number.intValue();
    } else if (targetClass.equals(Long.class)) {
        return number.longValue();
    } else if (targetClass.equals(Float.class)) {
        return number.floatValue();
    } else if (targetClass.equals(Double.class)) {
        return number.doubleValue();
    } else if (targetClass.equals(BigInteger.class)) {
        return BigInteger.valueOf(number.longValue());
    } else if (targetClass.equals(BigDecimal.class)) {
        // using BigDecimal(String) here, to avoid unpredictability of BigDecimal(double)
        // (see BigDecimal javadoc for details)
        return new BigDecimal(number.toString());
    } else {
        throw new IllegalArgumentException("Could not convert number [" + number + "] of type ["
                + number.getClass().getName() + "] to unknown target class [" + targetClass.getName() + "]");
    }
}

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From source file:cc.redberry.core.number.Exponentiation.java

static BigInteger findIntegerRoot(BigInteger base, BigInteger power) {
    BigInteger maxBits = BigInteger.valueOf(base.bitLength() + 1); // base < 2 ^ (maxBits + 1)
    // => base ^ ( 1 / power ) < 2 ^ ( (maxBits + 1) / power )

    BigInteger[] divResult = maxBits.divideAndRemainder(power);
    if (divResult[1].signum() == 0) // i.e. divResult[1] == 0
        maxBits = divResult[0];/*  ww  w  . j  a v a 2 s . com*/
    else
        maxBits = divResult[0].add(BigInteger.ONE);

    if (maxBits.bitLength() > 31)
        throw new RuntimeException("Too many bits...");

    int targetBitsNumber = maxBits.intValue();
    int resultLengthM1 = targetBitsNumber / 8 + 1; //resultLength minus one
    byte[] result = new byte[resultLengthM1];
    resultLengthM1--;

    int bitNumber = targetBitsNumber;

    int cValue;
    BigInteger testValue;

    while ((--bitNumber) >= 0) {
        //setting bit
        result[resultLengthM1 - (bitNumber >> 3)] |= 1 << (bitNumber & 0x7);

        //Testing
        testValue = new BigInteger(result);
        cValue = ArithmeticUtils.pow(testValue, power).compareTo(base);
        if (cValue == 0)
            return testValue;
        if (cValue > 0)
            result[resultLengthM1 - (bitNumber >> 3)] &= ~(1 << (bitNumber & 0x7));
    }

    return null;
}

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