public class Binary
extends java.lang.Object
This project was carried out at:
and supported byGenOpt Copyright (c) 1998-2021, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from the U.S. Dept. of Energy). All rights reserved.
| Modifier and Type | Field and Description |
|---|---|
private static int |
BIT_SIZE
The number of bits used to present binary numbers
|
| Modifier | Constructor and Description |
|---|---|
private |
Binary()
Empty constructor.
|
| Modifier and Type | Method and Description |
|---|---|
private static long |
binaryToLong(char[] charArray)
Converts a binary
char array to
the long number it presents. |
private static long |
binaryToLong(int[] intArray)
Converts a binary
int array to
the long number it presents. |
private static java.lang.String |
binaryToString(int[] intArr,
int length)
Returns a
String representation of the argument
that contains 0 or 1. |
static long |
getGrayCode(long n)
Gets the Gray code.
|
static long |
getInverseGrayCode(int[] gray)
Gets the inverse of the Gray code of a binary
int array. |
static long |
getInverseGrayCode(long gray)
Gets the inverse of the Gray code.
|
static long |
getL2Norm(int[] i,
int[] j)
Gets the L2 norm.
|
static int |
getStringLength(long n)
Gets the length of the binary string required to represent
the argument.
|
static long |
ieor(long i,
long j)
Computes the value of a bitwise exclusive or between the arguments.
|
static char[] |
increaseLength(char[] binStr,
int length)
Increases the length of a
char array by
setting additional elements with 0. |
static long |
ishft(long i,
int shift)
Computes the value obtained by shifting the bits of
i
by shift positions. |
static void |
main(java.lang.String[] args) |
static char[] |
toBinaryChar(long i)
Returns a
char[] representation of the long
argument as an unsigned integer in base 2. |
private static int[] |
toBinaryInt(char[] c)
Converts a
char array with binary values to
a binary int array. |
static int[] |
toBinaryInt(long i)
Returns an
int[] representation of the long
argument as an unsigned integer in base 2. |
static int[] |
toBinaryInt(long i,
int length)
Returns an
int[] representation of the long
argument as an unsigned integer in base 2. |
private static final int BIT_SIZE
private Binary()
static methods and fields.public static final long getL2Norm(int[] i,
int[] j)
i - an integer arrayj - an integer arrayjava.lang.IllegalArgumentException - if the arguments have different lengthpublic static char[] toBinaryChar(long i)
char[] representation of the long
argument as an unsigned integer in base 2.i - a long to be converted to a char[].char[] representation of the
unsigned long value represented by the argument
in binary (base 2).public static int[] toBinaryInt(long i)
int[] representation of the long
argument as an unsigned integer in base 2.i - a long to be converted to an int[].int[] representation of the
unsigned long value represented by the argument
in binary (base 2).public static int[] toBinaryInt(long i,
int length)
int[] representation of the long
argument as an unsigned integer in base 2.i - a long to be converted to an int[].length - number of elements of the returned arrayint[] representation of the
unsigned long value represented by the argument
in binary (base 2).java.lang.IllegalArgumentException - if length is
not long enough to represent the argument as a binary integer arraypublic static int getStringLength(long n)
throws java.lang.IllegalArgumentException
n - argument whose required length will be computed.java.lang.IllegalArgumentException - if n < 0private static final java.lang.String binaryToString(int[] intArr,
int length)
throws java.lang.IllegalArgumentException
String representation of the argument
that contains 0 or 1.intArr - an int[] array containing 0 or 1length - the length of the string array that will be returnedString representation of the argumentjava.lang.IllegalArgumentException - if the argument contains non-binary
numberspublic static long getGrayCode(long n)
throws java.lang.IllegalArgumentException
n - non-negative argument whose length will be computedjava.lang.IllegalArgumentException - if n < 0private static int[] toBinaryInt(char[] c)
char array with binary values to
a binary int array.c - a char array with 0 and 1
elementsc converted to an int arrayjava.lang.IllegalArgumentException - if c is not a binary arrayprivate static long binaryToLong(int[] intArray)
int array to
the long number it presents.intArray - a binary int arrayprivate static long binaryToLong(char[] charArray)
throws java.lang.IllegalArgumentException
char array to
the long number it presents.charArray - a binary int arrayjava.lang.IllegalArgumentException - if c is not a binary arraypublic static long getInverseGrayCode(int[] gray)
int array.
gray is first encoded in a long value,
and then the inverse Gray coding of the long is
computed and returned.gray - an int[] argument with binary numbersgray, using inverse
Gray codingpublic static long getInverseGrayCode(long gray)
gray - a number in Gray codegray, using inverse
Gray codingpublic static final char[] increaseLength(char[] binStr,
int length)
throws java.lang.IllegalArgumentException
char array by
setting additional elements with 0.
If n=binStr.length ≤ length , then
the return argument has 0 at the
elements 0 to lenth-n.binStr - the binary string string to be extendedlength - the length of the returned binary stringbinStr with increased lengthjava.lang.IllegalArgumentException - if binStr.length > lengthpublic static final long ieor(long i,
long j)
i - first argumentj - second argumentpublic static final long ishft(long i,
int shift)
i
by shift positions.
If shift is positive, the shift is to the left,
otherwise to the right.
Bits shifted off the left or right are lost and zero bits are
shifted in from the opposite end.i - value whose bits will be shiftedshift - number of positions that the bits will be shiftedi after shifting the bitspublic static void main(java.lang.String[] args)