Example usage for java.math BigInteger valueOf

List of usage examples for java.math BigInteger valueOf

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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:Main.java

public static void main(String[] args) {

    Long l = new Long(123456789L);

    BigInteger bi = BigInteger.valueOf(l);

    System.out.println(bi);/*from ww w  . j av a 2 s  .co m*/
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    BigInteger bi1 = new BigInteger("1234567890123456890");
    BigInteger bi2 = BigInteger.valueOf(123L);

    bi1 = bi1.divide(bi2);/*from www.  j ava2  s. c o m*/

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    BigInteger bi1 = new BigInteger("1234567890123456890");
    BigInteger bi2 = BigInteger.valueOf(123L);

    bi1 = bi1.multiply(bi2);/* www .  ja  v a 2  s. co  m*/

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    BigInteger bi1 = new BigInteger("1234567890123456890");
    BigInteger bi2 = BigInteger.valueOf(123L);

    bi1 = bi1.subtract(bi2);//from www  . j  a va  2s.co m

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    BigInteger bi1 = new BigInteger("1234567890123456890");
    BigInteger bi2 = BigInteger.valueOf(123L);

    bi1 = bi1.multiply(bi2);/*from w  w w  .  j  av  a  2s  .com*/

    bi1 = bi1.subtract(bi2);

    bi1 = bi1.divide(bi2);

    bi1 = bi1.negate();

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    // Create via a string
    BigInteger bi1 = new BigInteger("1234567890123456890");

    // Create via a long
    BigInteger bi2 = BigInteger.valueOf(123L);

    bi1 = bi1.add(bi2);/*from   w w  w .java2s .  co  m*/

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    // Create via a string
    BigInteger bi1 = new BigInteger("1234567890123456890");

    // Create via a long
    BigInteger bi2 = BigInteger.valueOf(123L);

    bi1 = bi1.add(bi2);/*from   w  ww  . j a  v a 2s .c o  m*/
    bi1 = bi1.multiply(bi2);
    bi1 = bi1.subtract(bi2);
    bi1 = bi1.divide(bi2);
    bi1 = bi1.negate();
    int exponent = 2;
    bi1 = bi1.pow(exponent);

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String s = "F488FD584E49DBCD20B49DE49107366B336C380D451D0F7C88"
            + "11111111111111111111111111111111111111111111111111"
            + "11111111111111111111111111111111111111111111111111"
            + "11111111111111111111111111111111111111111111111111"
            + "11111111111111111111111111111111111111111111111111" + "2F78C7";
    BigInteger base = BigInteger.valueOf(2);
    BigInteger modulus = new BigInteger(s, 16);
    DHParameterSpec skipParameterSpec = new DHParameterSpec(modulus, base);

    KeyPairGenerator kpg1 = KeyPairGenerator.getInstance("DH");
    kpg1.initialize(skipParameterSpec);// w w  w  .j  av a  2  s  .co m
    KeyPair kp1 = kpg1.generateKeyPair();

    KeyAgreement ka1 = KeyAgreement.getInstance("DH");
    DHPrivateKey privateKey1 = (DHPrivateKey) kp1.getPrivate();
    DHPublicKey publicKey1 = (DHPublicKey) kp1.getPublic();
    ka1.init(privateKey1);
    System.out.println("1 is using " + publicKey1.getY() + " for its public key");
    KeyPairGenerator kpg2 = KeyPairGenerator.getInstance("DH");
    kpg2.initialize(skipParameterSpec);
    KeyPair kp2 = kpg2.generateKeyPair();

    KeyAgreement ka2 = KeyAgreement.getInstance("DH");
    DHPrivateKey privateKey2 = (DHPrivateKey) kp2.getPrivate();
    DHPublicKey publicKey2 = (DHPublicKey) kp2.getPublic();
    ka2.init(privateKey2);
    System.out.println("2 is using " + publicKey2.getY() + " for its public key");
    ka1.doPhase(publicKey2, true);
    byte[] sharedKey1 = ka1.generateSecret();
    System.out.println("1 is using " + new BigInteger(1, sharedKey1) + " for its shared key");

    ka2.doPhase(publicKey1, true);
    byte[] sharedKey2 = ka2.generateSecret();
    System.out.println("2 is using " + new BigInteger(1, sharedKey2) + " for its shared key");
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String s = "F488FD584E49DBCD20B49DE49107366B336C380D451D0F7C88"
            + "11111111111111111111111111111111111111111111111111"
            + "11111111111111111111111111111111111111111111111111"
            + "11111111111111111111111111111111111111111111111111"
            + "11111111111111111111111111111111111111111111111111" + "2F78C7";
    BigInteger base = BigInteger.valueOf(2);
    BigInteger modulous = new BigInteger(s, 16);
    DHParameterSpec skipParameterSpec = new DHParameterSpec(modulous, base);

    KeyPairGenerator kpg1 = KeyPairGenerator.getInstance("DH");
    kpg1.initialize(skipParameterSpec);//from w  w  w  . j a va  2 s .c o  m
    KeyPair kp1 = kpg1.generateKeyPair();

    KeyAgreement ka1 = KeyAgreement.getInstance("DH");
    DHPrivateKey privateKey1 = (DHPrivateKey) kp1.getPrivate();
    DHPublicKey publicKey1 = (DHPublicKey) kp1.getPublic();
    ka1.init(privateKey1);
    System.out.println("1 is using " + publicKey1.getY() + " for its public key");

    KeyPairGenerator kpg2 = KeyPairGenerator.getInstance("DH");
    kpg2.initialize(skipParameterSpec);
    KeyPair kp2 = kpg2.generateKeyPair();

    KeyAgreement ka2 = KeyAgreement.getInstance("DH");
    DHPrivateKey privateKey2 = (DHPrivateKey) kp2.getPrivate();
    DHPublicKey publicKey2 = (DHPublicKey) kp2.getPublic();
    ka2.init(privateKey2);
    System.out.println("2 is using " + publicKey2.getY() + "for its public key");
    // Use the KeyAgreement object of 1 to generate its shared key
    ka1.doPhase(publicKey2, true);
    SecretKey sharedKey1 = ka1.generateSecret("DES");
    System.out.println("1 is using " + new String(sharedKey1.getEncoded()) + " as its DES session key");
    // Use the KeyAgreement object of 2 to generate its shared key
    ka2.doPhase(publicKey1, true);
    SecretKey sharedKey2 = ka2.generateSecret("DES");
    System.out.println("2 is using " + new String(sharedKey2.getEncoded()) + "as its DES session key");
}

From source file:BigIntegerTest.java

public static void main(String[] args) {
    Scanner in = new Scanner(System.in);

    System.out.print("How many numbers do you need to draw? ");
    int k = in.nextInt();

    System.out.print("What is the highest number you can draw? ");
    int n = in.nextInt();

    /*/* www .j  a  v a  2  s.  c  om*/
     * compute binomial coefficient n*(n-1)*(n-2)*...*(n-k+1)/(1*2*3*...*k)
     */

    BigInteger lotteryOdds = BigInteger.valueOf(1);

    for (int i = 1; i <= k; i++)
        lotteryOdds = lotteryOdds.multiply(BigInteger.valueOf(n - i + 1)).divide(BigInteger.valueOf(i));

    System.out.println("Your odds are 1 in " + lotteryOdds + ". Good luck!");
}