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 int compareTimestamps(String lhsTimestamp, String rhsTimestamp) {
    BigInteger lhs = new BigInteger(lhsTimestamp);
    BigInteger rhs = new BigInteger(rhsTimestamp);
    return lhs.compareTo(rhs);
}

From source file:Main.java

public static boolean isBetweenTimeStr(String time, String starttime, String endtime) {
    try {/*  www  . j a v a 2s  .  c  o m*/
        BigInteger timeInt = new BigInteger(time);
        BigInteger starttimeInt = new BigInteger(starttime);
        BigInteger endttimeInt = new BigInteger(endtime);
        int compareResult = timeInt.compareTo(starttimeInt);
        if (compareResult == -1) {
            return false;
        } else if (compareResult == 0) {
            return true;
        } else if (compareResult == 1) {
            compareResult = timeInt.compareTo(endttimeInt);
            if (compareResult >= 0) {
                return false;
            } else {
                return true;
            }
        }
        return false;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return false;
}

From source file:Main.java

public static BigInteger OS2IP(byte[] _os) {
    byte[] _osWithPadding = new byte[_os.length + 1];
    System.arraycopy(_os, 0, _osWithPadding, 1, _os.length);
    return new BigInteger(_osWithPadding);
}

From source file:Main.java

/**
 * Transforms a number String to a byte array
 * @param in number String/*from  w w w. ja  v  a2s  . c o m*/
 * @return
 */
public static byte[] NumStringToBytes(String in) {
    BigInteger num = new BigInteger(in);
    byte[] bytes = num.toByteArray();
    if (bytes.length > 0) {
        if (bytes[0] == 0) {
            byte[] cuttedByte = new byte[bytes.length - 1];
            System.arraycopy(bytes, 1, cuttedByte, 0, bytes.length - 1);
            return cuttedByte;
        }

    }
    return num.toByteArray();
}

From source file:Main.java

public static int VarIntLength(long value) {
    if (value < 253)
        return 1;
    if (value < 65536)
        return 3;
    BigInteger bytes5 = new BigInteger("4294967296");
    if (value < bytes5.longValue())
        return 5;
    return 9;//from ww  w  .j  a va2  s.c  om
}

From source file:Main.java

public static BigInteger readBigInteger(ByteArrayInputStream bais) {
    return new BigInteger(readData(bais));
}

From source file:Main.java

/**
 * Transforms a byte array to a signed//from   w  w w .  j a v a 2  s. c  o m
 * number String
 * @param in byte array
 * @return signed num String
 */
public static String bytesToSignedNumString(byte[] in) {
    BigInteger num = new BigInteger(in);
    return num.toString();
}

From source file:Main.java

public static byte[] base58ToBytes(String value) {
    BigInteger bigNum58 = new BigInteger("58");
    BigInteger tempBigValue = new BigInteger("0");
    int leadingZeroes = 0;
    boolean justStarted = true;
    for (int i = 0; i < value.length(); i++) {
        if (justStarted && value.toCharArray()[i] == '1') {
            leadingZeroes++;/*from  w  ww .ja v a 2 s  .  c o  m*/
        } else {
            justStarted = false;
            tempBigValue = tempBigValue.add(bigNum58.pow(value.length() - i - 1)
                    .multiply(new BigInteger("" + base58Array.indexOf(value.toCharArray()[i]))));
        }
    }
    byte[] bigValue = tempBigValue.toByteArray();
    int bigValueStart = 0;
    for (int j = 0; j < bigValue.length; j++) {
        if (bigValue[j] != 0) {
            bigValueStart = j;
            break;
        }
    }
    byte[] byteResult = new byte[bigValue.length + leadingZeroes - bigValueStart];
    for (int i = 0; i < byteResult.length; i++) {
        if (i - leadingZeroes + bigValueStart < bigValue.length && i - leadingZeroes + bigValueStart >= 0)
            byteResult[i] = i < leadingZeroes ? 0 : bigValue[i - leadingZeroes + bigValueStart];
    }
    return byteResult;
}

From source file:Main.java

/**
 * <p>//w  w w. j  av  a 2  s .c om
 * Converts a 8 byte long byte array into a long value
 * </p>
 * 
 * @param b
 *            the 8 byte array containing the bits of the long value
 * @return the converted long object
 */
public static long byte2long(byte[] b) {
    return new BigInteger(b).longValue();
}

From source file:Main.java

public static BigInteger sumRights(String[] rights) {
    BigInteger num = new BigInteger("0");
    for (int i = 0; i < rights.length; i++) {
        num = num.setBit(Integer.parseInt(rights[i]));
    }/*  w  ww.j a  v  a  2  s  .co m*/
    return num;
}