java.lang.Object
ij.util.Tools
This class contains static utility methods.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final char[]
This array contains the 16 hex digits '0'-'F'. -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic void
addToArray
(float[] a, float value) Adds a number to all array elementsstatic String
Converts a Color to an 7 byte hex string starting with '#'.static String
Copies the contents of the file at 'path1' to 'path2', returning an error message (as a non-empty string) if there is an error.static String
decodeEscaped
(String str, char delim) Decodes backslash-escaped characters from the String until the character 'delim' is found.static String
f2hex
(float f) Converts a float to an 9 byte hex string starting with '#'.static String
Converts carriage returns to line feeds.static int
getDecimalPlaces
(double n) Returns the number of decimal places needed to display a number, or -2 if exponential notation should be used.static int
getDecimalPlaces
(double n1, double n2) Returns the number of decimal places needed to display two numbers, or -2 if exponential notation should be used.static String
Returns the checksum of a string or file, or "0" if no success.static double[]
getMinMax
(double[] a) Determines the minimum and maximum value in the arraya
and returns them as 2-element array {minimum, maximum}.static double[]
getMinMax
(float[] a) Determines the minimum and maximum value in the arraya
and returns them as 2-element array {minimum, maximum}.static double
getNumberFromList
(String list, String key) Retrieves a number form a list of key-number pairs like "value1=1234.5 area=1.2e6".static double
getNumberFromList
(String list, String key, double defaultValue) static ImageStatistics
getStatistics
(double[] a) static String
getStringFromList
(String list, String key) Retrieves a String form a list of key-number pairs like "value1="abc" str='the Text'".static String
getStringFromList
(String list, String key, String defaultValue) static String
int2hex
(int i, int digits) Converts an int to a zero-padded hex string of fixed length 'digits'.static String
openFromIJJarAsString
(String path) Opens a text file in ij.jar as a String (example path: "/macros/Circle_Tool.txt").static double
Returns a double containg the value represented by the specifiedString
.static double
parseDouble
(String s, double defaultValue) Returns a double containg the value represented by the specifiedString
.static int[]
rank
(double[] values) Returns a sorted list of indices of the specified double array.static int[]
Returns a sorted list of indices of the specified String array.static double[]
resampleArray
(double[] y1, int len2) Returns an array linearly resampled to a different length.static String[]
Splits a string into substrings using the default delimiter set, which is " \t\n\r" (space, tab, newline and carriage-return).static String[]
Splits a string into substring using the characters contained in the second argument as the delimiter set.static double[]
toDouble
(float[] a) Converts the float array 'a' to a double array.static float[]
toFloat
(double[] a) Converts the double array 'a' to a float array.
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Field Details
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hexDigits
public static final char[] hexDigitsThis array contains the 16 hex digits '0'-'F'.
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Constructor Details
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Tools
public Tools()
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Method Details
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c2hex
Converts a Color to an 7 byte hex string starting with '#'. -
f2hex
Converts a float to an 9 byte hex string starting with '#'. -
int2hex
Converts an int to a zero-padded hex string of fixed length 'digits'. If the number is too high, it gets truncated, keeping only the lowest 'digits' characters. -
getStatistics
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getMinMax
public static double[] getMinMax(double[] a) Determines the minimum and maximum value in the arraya
and returns them as 2-element array {minimum, maximum}. -
getMinMax
public static double[] getMinMax(float[] a) Determines the minimum and maximum value in the arraya
and returns them as 2-element array {minimum, maximum}. -
toDouble
public static double[] toDouble(float[] a) Converts the float array 'a' to a double array. -
toFloat
public static float[] toFloat(double[] a) Converts the double array 'a' to a float array. -
addToArray
public static void addToArray(float[] a, float value) Adds a number to all array elements -
fixNewLines
Converts carriage returns to line feeds. -
parseDouble
Returns a double containg the value represented by the specifiedString
.- Parameters:
s
- the string to be parsed.defaultValue
- the value returned ifs
does not contain a parsable double- Returns:
- The double value represented by the string argument or
defaultValue
if the string does not contain a parsable double
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parseDouble
Returns a double containg the value represented by the specifiedString
.- Parameters:
s
- the string to be parsed.- Returns:
- The double value represented by the string argument or Double.NaN if the string does not contain a parsable double
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getDecimalPlaces
public static int getDecimalPlaces(double n) Returns the number of decimal places needed to display a number, or -2 if exponential notation should be used. -
getDecimalPlaces
public static int getDecimalPlaces(double n1, double n2) Returns the number of decimal places needed to display two numbers, or -2 if exponential notation should be used. -
split
Splits a string into substrings using the default delimiter set, which is " \t\n\r" (space, tab, newline and carriage-return). -
split
Splits a string into substring using the characters contained in the second argument as the delimiter set. -
rank
public static int[] rank(double[] values) Returns a sorted list of indices of the specified double array. Modified from: http://stackoverflow.com/questions/951848 by N.Vischer. -
rank
Returns a sorted list of indices of the specified String array. -
resampleArray
public static double[] resampleArray(double[] y1, int len2) Returns an array linearly resampled to a different length. -
openFromIJJarAsString
Opens a text file in ij.jar as a String (example path: "/macros/Circle_Tool.txt"). -
copyFile
Copies the contents of the file at 'path1' to 'path2', returning an error message (as a non-empty string) if there is an error. Based on the method with the same name in Tobias Pietzsch's TifBenchmark class. -
getNumberFromList
Retrieves a number form a list of key-number pairs like "value1=1234.5 area=1.2e6". The "=" (if present) must be part of the 'key' string. Delimiters may be commas, semicolons or whitespace. There must be no whitespace between key and number. Returns Double.NaN if 'list' is null, if the key is not found, if the number is 'NaN' or invalid. -
getNumberFromList
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getStringFromList
Retrieves a String form a list of key-number pairs like "value1="abc" str='the Text'". The "=" (if present) must be part of the 'key' string. Strings containing commas, semicolons or whitespace must be enclosed in single or double quotes. There must be no whitespace between key and quotes or key and unquoted String. Strings must not contain a key. In case of doubt, e.g., replace the '=' with '\=' Escape sequences with backslashes are recognized, also backslash-u???? for unicode. Returns null if 'list' is null or if the key is not found -
getStringFromList
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decodeEscaped
Decodes backslash-escaped characters from the String until the character 'delim' is found. With 'delim'=-1, does not search for a delimiter, with 'delim'=(char)-2, (unescaped) whitespace, commas and semicolons are interpreted as delimiters. Also decodes unicode backslash-u???? characters -
getHash
Returns the checksum of a string or file, or "0" if no success. The 'method' argument must be "MD5" or "SHA-256".
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