Example usage for java.math BigInteger BigInteger

Introduction

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

Prototype

private BigInteger(long val)

Source Link

Document

Constructs a BigInteger with the specified value, which may not be zero.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    byte[] bytes = new byte[] { (byte) 0x12, (byte) 0x0F, (byte) 0xF0 };

    // Create a BigInteger using the byte array
    BigInteger bi = new BigInteger(bytes);

    String s = bi.toString(2);/*from   ww w. j  a va  2s  . com*/
    System.out.println(s);

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    // A negative value
    byte[] bytes = new byte[] { (byte) 0xFF, 0x00, 0x00 }; // -65536
    // A positive value
    bytes = new byte[] { 0x1, 0x00, 0x00 }; // 65536
    BigInteger bi = new BigInteger(bytes);
}

From source file:MainClass.java

public static void main(String[] args) {
    System.out.println("Here's Long.MAX_VALUE: " + Long.MAX_VALUE);
    BigInteger bInt = new BigInteger("3419229223372036854775807");
    System.out.println("Here's a bigger number: " + bInt);
    System.out.println("Here it is as a double: " + bInt.doubleValue());
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    BigInteger p = new BigInteger(Integer.toString(pValue));
    BigInteger g = new BigInteger(Integer.toString(gValue));
    System.out.println("p = " + p);
    System.out.println("g = " + g);

    BigInteger Xa = new BigInteger(Integer.toString(XaValue));
    BigInteger Xb = new BigInteger(Integer.toString(XbValue));
    System.out.println("Xa = " + Xa);
    System.out.println("Xb = " + Xb);

    BigInteger Ya = g.modPow(Xa, p);
    System.out.println("Ya = " + Ya);

    BigInteger Yb = g.modPow(Xb, p);
    System.out.println("Yb = " + Yb);

    BigInteger Ka = Ya.modPow(Xa, p);
    System.out.println("Users A, K = " + Ka);

    BigInteger Kb = Yb.modPow(Xb, p);
    System.out.println("Users B, K = " + Kb);

}

From source file:BigNums.java

public static void main(String[] argv) {
    //+//from www . j  a v  a2  s. c o m
    System.out.println("Here's Long.MAX_VALUE: " + Long.MAX_VALUE);
    BigInteger bInt = new BigInteger("3419229223372036854775807");
    System.out.println("Here's a bigger number: " + bInt);
    System.out.println("Here it is as a double: " + bInt.doubleValue());
    //-
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    int eValue = 79;
    int bitLength = 1024; // KeySize

    BigInteger e = e = new BigInteger(Integer.toString(eValue));

    KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
    kpg.initialize(bitLength);//from   w w w.  j a  v  a 2 s  . c  o  m
    KeyPair kp = kpg.generateKeyPair();

    KeyFactory kfactory = KeyFactory.getInstance("RSA");
    RSAPublicKeySpec kspec = (RSAPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), RSAPublicKeySpec.class);

    kpg = KeyPairGenerator.getInstance("RSA", "SunRsaSign");

    e = new BigInteger(Integer.toString(eValue));
    System.out.println("e =" + e);
    RSAKeyGenParameterSpec param = new RSAKeyGenParameterSpec(bitLength, e);
    kpg.initialize(param);
    kp = kpg.generateKeyPair();

    kfactory = KeyFactory.getInstance("RSA", "SunRsaSign");

    kspec = (RSAPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), RSAPublicKeySpec.class);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    BigInteger p = new BigInteger(Integer.toString(pValue));
    BigInteger g = new BigInteger(Integer.toString(gValue));
    BigInteger Xa = new BigInteger(Integer.toString(XaValue));
    BigInteger Xb = new BigInteger(Integer.toString(XbValue));

    createKey();/* ww w .  ja  v a2  s . c  o  m*/

    int bitLength = 512; // 512 bits
    SecureRandom rnd = new SecureRandom();
    p = BigInteger.probablePrime(bitLength, rnd);
    g = BigInteger.probablePrime(bitLength, rnd);

    createSpecificKey(p, g);
}

From source file:Main.java

public static void main(String[] argv) {
    BigInteger l = new BigInteger("9999999");
    System.out.println(findPalindrome(l));

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    URL u = new URL("http://www.google.com");
    InputStream in = u.openStream();
    MessageDigest sha = MessageDigest.getInstance("SHA");
    byte[] data = new byte[1024];
    int bytesRead = -1;
    while ((bytesRead = in.read(data)) >= 0) {
        sha.update(data, 0, bytesRead);//from  w ww.  ja  v a 2  s  .  c  o  m
    }
    byte[] result = sha.digest();
    System.out.println(Arrays.toString(result));
    System.out.println(new BigInteger(result));
}

From source file:PalindromeBig.java

public static void main(String[] argv) {
    for (int i = 0; i < argv.length; i++)
        try {// w  w  w .  jav  a2  s  .co m
            BigInteger l = new BigInteger(argv[i]);
            if (l.compareTo(BigInteger.ZERO) < 0) {
                System.err.println(argv[i] + " -> TOO SMALL");
                continue;
            }
            System.out.println(argv[i] + "->" + findPalindrome(l));
        } catch (NumberFormatException e) {
            System.err.println(argv[i] + "-> INVALID");
        } catch (IllegalStateException e) {
            System.err.println(argv[i] + "-> " + e);
        }
}