org.brewchain.core.crypto.cwv.util

类 BIUtil

java.lang.Object

org.brewchain.core.crypto.cwv.util.BIUtil

public class BIUtil
extends java.lang.Object

构造器概要

构造器

构造器和说明
BIUtil()

方法概要

限定符和类型	方法和说明
static int	addSafely(int a, int b) Returns a result of safe addition of two int values Integer.MAX_VALUE is returned if overflow occurs
static boolean	exitLong(java.math.BigInteger value)
static boolean	isCovers(java.math.BigInteger covers, java.math.BigInteger value)
static boolean	isEqual(java.math.BigInteger valueA, java.math.BigInteger valueB)
static boolean	isIn20PercentRange(java.math.BigInteger first, java.math.BigInteger second)
static boolean	isLessThan(java.math.BigInteger valueA, java.math.BigInteger valueB)
static boolean	isMoreThan(java.math.BigInteger valueA, java.math.BigInteger valueB)
static boolean	isNotCovers(java.math.BigInteger covers, java.math.BigInteger value)
static boolean	isNotEqual(java.math.BigInteger valueA, java.math.BigInteger valueB)
static boolean	isPositive(java.math.BigInteger value)
static boolean	isZero(java.math.BigInteger value)
static java.math.BigInteger	max(java.math.BigInteger first, java.math.BigInteger second)
static java.math.BigInteger	sum(java.math.BigInteger valueA, java.math.BigInteger valueB)
static java.math.BigInteger	toBI(byte[] data)
static java.math.BigInteger	toBI(long data)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

BIUtil

public BIUtil()

方法详细资料

isZero

public static boolean isZero(java.math.BigInteger value)

参数:

value - - not null

返回:

true - if the param is zero

isEqual

public static boolean isEqual(java.math.BigInteger valueA,
                              java.math.BigInteger valueB)

参数:

valueA - - not null

valueB - - not null

返回:

true - if the valueA is equal to valueB is zero

isNotEqual

public static boolean isNotEqual(java.math.BigInteger valueA,
                                 java.math.BigInteger valueB)

参数:

valueA - - not null

valueB - - not null

返回:

true - if the valueA is not equal to valueB is zero

isLessThan

public static boolean isLessThan(java.math.BigInteger valueA,
                                 java.math.BigInteger valueB)

参数:

valueA - - not null

valueB - - not null

返回:

true - if the valueA is less than valueB is zero

isMoreThan

public static boolean isMoreThan(java.math.BigInteger valueA,
                                 java.math.BigInteger valueB)

参数:

valueA - - not null

valueB - - not null

返回:

true - if the valueA is more than valueB is zero

sum

public static java.math.BigInteger sum(java.math.BigInteger valueA,
                                       java.math.BigInteger valueB)

参数:

valueA - - not null

valueB - - not null

返回:

sum - valueA + valueB

toBI

public static java.math.BigInteger toBI(byte[] data)

参数:

data - = not null

返回:

new positive BigInteger

toBI

public static java.math.BigInteger toBI(long data)

参数:

data - = not null

返回:

new positive BigInteger

isPositive

public static boolean isPositive(java.math.BigInteger value)

isCovers

public static boolean isCovers(java.math.BigInteger covers,
                               java.math.BigInteger value)

isNotCovers

public static boolean isNotCovers(java.math.BigInteger covers,
                                  java.math.BigInteger value)

exitLong

public static boolean exitLong(java.math.BigInteger value)

isIn20PercentRange

public static boolean isIn20PercentRange(java.math.BigInteger first,
                                         java.math.BigInteger second)

max

public static java.math.BigInteger max(java.math.BigInteger first,
                                       java.math.BigInteger second)

addSafely

public static int addSafely(int a,
                            int b)

Returns a result of safe addition of two int values Integer.MAX_VALUE is returned if overflow occurs