Package org.apache.sshd.common.util

Class NumberUtils

java.lang.Object

org.apache.sshd.common.util.NumberUtils

public final class NumberUtils
extends Object

Author:

Apache MINA SSHD Project

Field Summary

Fields

Modifier and Type	Field	Description
static List<Class<?>>	NUMERIC_PRIMITIVE_CLASSES	A List of all the Class types used to represent the primitive numerical values

Method Summary

Modifier and Type	Method	Description
static List<Integer>	asList(int... values)
static int	diffOffset(byte[] a1, int startPos1, byte[] a2, int startPos2, int len)
static byte[]	emptyIfNull(byte[] a)
static int	getNextPowerOf2(int value)
static int	hashCode(byte... values)
static int	hashCode(byte[] a, int offset, int len)
static int	hashCode(int... values)
static int	hashCode(long... values)
static boolean	isEmpty(byte[] a)
static boolean	isEmpty(int[] a)
static boolean	isEmpty(long[] a)
static boolean	isIntegerNumber(CharSequence cs)	Checks if optional sign and all others are '0'-'9'
static boolean	isNumericClass(Class<?> clazz)
static String	join(char separator, boolean unsigned, byte... values)
static String	join(char separator, int... values)
static String	join(char separator, long... values)
static String	join(CharSequence separator, boolean unsigned, byte... values)
static String	join(CharSequence separator, int... values)
static String	join(CharSequence separator, long... values)
static int	length(byte... a)
static int	length(int... a)
static int	length(long... a)
static Integer	toInteger(Number n)	Converts a Number into an Integer if not already such

Methods inherited from class java.lang.Object

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

Field Detail

NUMERIC_PRIMITIVE_CLASSES

public static final List<Class<?>> NUMERIC_PRIMITIVE_CLASSES

A List of all the Class types used to represent the primitive numerical values

Method Detail

getNextPowerOf2

public static int getNextPowerOf2(int value)

Parameters:

value - The original (non-negative) value

Returns:

The closest positive power of 2 that is greater or equal to the value. If none can be found then returns the original value

hashCode

public static int hashCode(long... values)

hashCode

public static int hashCode(int... values)

hashCode

public static int hashCode(byte... values)

hashCode

public static int hashCode(byte[] a,
                           int offset,
                           int len)

diffOffset

public static int diffOffset(byte[] a1,
                             int startPos1,
                             byte[] a2,
                             int startPos2,
                             int len)

isNumericClass

public static boolean isNumericClass(Class<?> clazz)

Parameters:

clazz - The Class to examine - ignored if null

Returns:

If the class is a Number or one of the primitive numerical types

See Also:

NUMERIC_PRIMITIVE_CLASSES

toInteger

public static Integer toInteger(Number n)

Converts a Number into an Integer if not already such

Parameters:

n - The Number - ignored if null

Returns:

The equivalent Integer value

join

public static String join(CharSequence separator,
                          long... values)

join

public static String join(char separator,
                          long... values)

join

public static String join(CharSequence separator,
                          boolean unsigned,
                          byte... values)

join

public static String join(char separator,
                          boolean unsigned,
                          byte... values)

join

public static String join(CharSequence separator,
                          int... values)

join

public static String join(char separator,
                          int... values)

emptyIfNull

public static byte[] emptyIfNull(byte[] a)

isEmpty

public static boolean isEmpty(byte[] a)

isEmpty

public static boolean isEmpty(int[] a)

isEmpty

public static boolean isEmpty(long[] a)

length

public static int length(byte... a)

length

public static int length(int... a)

length

public static int length(long... a)

asList

public static List<Integer> asList(int... values)

isIntegerNumber

public static boolean isIntegerNumber(CharSequence cs)

Checks if optional sign and all others are '0'-'9'

Parameters:

cs - The CharSequence to check

Returns:

true if valid integer number