org.gonn.gava

Class Stu

java.lang.Object

org.gonn.gava.Stu

public class Stu
extends Object

Static Utils (STU) is a collection of static methods that are frequently used.

Version:

0.1.2

Author:

Gon Yi

Field Summary

Fields

Modifier and Type	Field and Description
static long	DAY
static char[]	EMPTY_CHAR_ARRAY
static int[]	EMPTY_INT_ARRAY
static String[]	EMPTY_STRING_ARRAY
static long	EPOCH_STARTED
static long	HOUR
static long	MINUTE
static long	SECOND
static boolean	VERBOSE_MODE

Method Summary

Modifier and Type	Method and Description
static <T> String	arrayToString(T[] ts)
static String	bitsToString(int bitflag)
static String	bitsToString(int bitflag, int size, char on, char off, boolean reverse)
static String	bitsToString(long bitflag)
static String	bitsToString(long bitflag, int size, char on, char off, boolean reverse)
static String	byteSizeToString(long sizeInByte)
static <T> T	chain(T t, UnaryOperator<T> fx1, UnaryOperator<T> fx2)
static <T> T	chain(T t, UnaryOperator<T> fx1, UnaryOperator<T> fx2, UnaryOperator<T> fx3)
static <T> T	chain(T t, UnaryOperator<T> fx1, UnaryOperator<T> fx2, UnaryOperator<T> fx3, UnaryOperator<T> fx4)
static <T> boolean	contain(T[] ts, T key)
static int	count(String haystack, char needle)
static int	count(String haystack, String needle)
static <T> int	count(T[] s, T key)
static String	epochToString()
static String	epochToString(long milliseconds)
static String	epochToString(long milliseconds, int offsetHr)
static String	epochToString(long milliseconds, int offsetHr, boolean signed)
static char	first(String s)
static <T> T	first(T[] t)
static String	getBetween(String s, String prefix, String suffix)
static StackTraceElement	getCaller(int skip)
static String	getCallerString(int skip)
static int	getDigits(int n)
static int	getDigits(long n)
static long	getEpoch()
static int	getHash(String s)
static String	getNth(String s, char delim, int index)
static <T> T	getNth(T[] tArr, int index, T fallback)
static long	getTimed(Runnable r)
static boolean	hasBits(int flag, int mask, boolean hasAll)
static <T> T	ifNull(T t, T fallback)
static String	intComma(long n)
static String	intPadding(long positiveNumber, int length, char padding)
static boolean	isAlpha(char c)
static boolean	isAlphanumeric(String s)
static boolean	isBetween(String s, String prefix, String suffix)
static boolean	isDigit(char c)
static boolean	isDigit(String s)
static <T> void	iterateNotNull(T[] ts, Consumer<T> fx)
static String	join(String delimiter, Object... objs)
static char	last(String s)
static <T> T	last(T[] t)
static void	log(String msg)
static void	log(Supplier<String> msg)
static <T> T	mustGet(T t, T fallback)
static <X extends Throwable,T> T	mustGet(T t, X exception)
static String	pad(String s, int min, int max, char padding, boolean leftPadding)
static String	padLeft(String s, int length, char padding)
static String	padRight(String s, int length, char padding)
static void	parseArgs(String[] args, BiConsumer<String,String> f)
static int	parseInt(String s)
static int	parseInt(String s, int fallback)
static long	parseLong(String s)
static long	parseLong(String s, long fallback)
static void	println(Object... any)
static void	prints(String name, Object... objs)
static String	removePrefix(String s, char prefix)
static String	removePrefix(String s, String prefix)
static String	removeSuffix(String s, char suffix)
static String	removeSuffix(String s, String suffix)
static String	repeat(char c, int n) Repeats char c for n times
static String	repeat(String s, int n) Repeats a string for n times
static int	setBits(int flag, int mask, boolean to)
static void	sleep(long ms)
static <T> T[]	subset(T[] src, int start, int end, IntFunction<T[]> generator) Subset of a T array
static String	substring(String s, int idx)
static String	substring(String s, int idxFrom, int idxTo)
static String	toHexString(byte[] bytes)
static String	trimLeft(String s)
static String	trimRight(String s)
static String	trimString(String input)

Methods inherited from class java.lang.Object

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

Field Detail

VERBOSE_MODE

public static final boolean VERBOSE_MODE

EPOCH_STARTED

public static final long EPOCH_STARTED

SECOND

public static final long SECOND

See Also:

Constant Field Values

MINUTE

public static final long MINUTE

See Also:

Constant Field Values

HOUR

public static final long HOUR

See Also:

Constant Field Values

DAY

public static final long DAY

See Also:

Constant Field Values

EMPTY_STRING_ARRAY

public static final String[] EMPTY_STRING_ARRAY

EMPTY_CHAR_ARRAY

public static final char[] EMPTY_CHAR_ARRAY

EMPTY_INT_ARRAY

public static final int[] EMPTY_INT_ARRAY

Method Detail

subset

public static <T> T[] subset(T[] src,
                             int start,
                             int end,
                             IntFunction<T[]> generator)

Subset of a T array

Type Parameters:

T - array T

Parameters:

src - Source T array

start - start index

end - end index

generator - to create new T[] (ig. String[]::new)

Returns:

New T array

count

public static int count(String haystack,
                        char needle)

count

public static int count(String haystack,
                        String needle)

count

public static <T> int count(T[] s,
                            T key)

contain

public static <T> boolean contain(T[] ts,
                                  T key)

substring

public static String substring(String s,
                               int idxFrom,
                               int idxTo)

substring

public static String substring(String s,
                               int idx)

getBetween

public static String getBetween(String s,
                                String prefix,
                                String suffix)

isBetween

public static boolean isBetween(String s,
                                String prefix,
                                String suffix)

getNth

public static String getNth(String s,
                            char delim,
                            int index)

getNth

public static <T> T getNth(T[] tArr,
                           int index,
                           T fallback)

first

public static <T> T first(T[] t)

last

public static <T> T last(T[] t)

first

public static char first(String s)

last

public static char last(String s)

removePrefix

public static String removePrefix(String s,
                                  String prefix)

removePrefix

public static String removePrefix(String s,
                                  char prefix)

removeSuffix

public static String removeSuffix(String s,
                                  String suffix)

removeSuffix

public static String removeSuffix(String s,
                                  char suffix)

getEpoch

public static long getEpoch()

epochToString

public static String epochToString(long milliseconds,
                                   int offsetHr,
                                   boolean signed)

epochToString

public static String epochToString(long milliseconds,
                                   int offsetHr)

epochToString

public static String epochToString(long milliseconds)

epochToString

public static String epochToString()

prints

public static void prints(String name,
                          Object... objs)

println

public static void println(Object... any)

join

public static String join(String delimiter,
                          Object... objs)

getDigits

public static int getDigits(int n)

getDigits

public static int getDigits(long n)

parseArgs

public static void parseArgs(String[] args,
                             BiConsumer<String,String> f)

getCaller

public static StackTraceElement getCaller(int skip)

getCallerString

public static String getCallerString(int skip)

getTimed

public static long getTimed(Runnable r)

sleep

public static void sleep(long ms)

log

public static void log(String msg)

log

public static void log(Supplier<String> msg)

mustGet

public static <T> T mustGet(T t,
                            T fallback)

mustGet

public static <X extends Throwable,T> T mustGet(T t,
                                                X exception)
                                         throws X extends Throwable

Throws:

X extends Throwable

ifNull

public static <T> T ifNull(T t,
                           T fallback)

parseInt

public static int parseInt(String s)
                    throws NumberFormatException

Throws:

NumberFormatException

parseInt

public static int parseInt(String s,
                           int fallback)

parseLong

public static long parseLong(String s)
                      throws NumberFormatException

Throws:

NumberFormatException

parseLong

public static long parseLong(String s,
                             long fallback)

getHash

public static int getHash(String s)

isDigit

public static boolean isDigit(String s)

isDigit

public static boolean isDigit(char c)

isAlpha

public static boolean isAlpha(char c)

isAlphanumeric

public static boolean isAlphanumeric(String s)

iterateNotNull

public static <T> void iterateNotNull(T[] ts,
                                      Consumer<T> fx)

bitsToString

public static String bitsToString(long bitflag)

bitsToString

public static String bitsToString(long bitflag,
                                  int size,
                                  char on,
                                  char off,
                                  boolean reverse)

bitsToString

public static String bitsToString(int bitflag)

bitsToString

public static String bitsToString(int bitflag,
                                  int size,
                                  char on,
                                  char off,
                                  boolean reverse)

setBits

public static int setBits(int flag,
                          int mask,
                          boolean to)

hasBits

public static boolean hasBits(int flag,
                              int mask,
                              boolean hasAll)

chain

public static <T> T chain(T t,
                          UnaryOperator<T> fx1,
                          UnaryOperator<T> fx2)

chain

public static <T> T chain(T t,
                          UnaryOperator<T> fx1,
                          UnaryOperator<T> fx2,
                          UnaryOperator<T> fx3)

chain

public static <T> T chain(T t,
                          UnaryOperator<T> fx1,
                          UnaryOperator<T> fx2,
                          UnaryOperator<T> fx3,
                          UnaryOperator<T> fx4)

repeat

public static String repeat(char c,
                            int n)

Repeats char c for n times

Parameters:

c - char to repeat

n - number of repeats

Returns:

String with repeated char

repeat

public static String repeat(String s,
                            int n)

Repeats a string for n times

Parameters:

s - string to repeat

n - number of repeats

Returns:

String with repeated string s

byteSizeToString

public static String byteSizeToString(long sizeInByte)

toHexString

public static String toHexString(byte[] bytes)

arrayToString

public static <T> String arrayToString(T[] ts)

intComma

public static String intComma(long n)

intPadding

public static String intPadding(long positiveNumber,
                                int length,
                                char padding)

pad

public static String pad(String s,
                         int min,
                         int max,
                         char padding,
                         boolean leftPadding)

padLeft

public static String padLeft(String s,
                             int length,
                             char padding)

padRight

public static String padRight(String s,
                              int length,
                              char padding)

trimLeft

public static String trimLeft(String s)

trimRight

public static String trimRight(String s)

trimString

public static String trimString(String input)