ij.util
Class Tools

java.lang.Object
  ij.util.Tools

public class Tools
extends Object

This class contains static utility methods.

Field Summary

static char[]

hexDigits This array contains the 16 hex digits '0'-'F'.

Constructor Summary

Tools()

Method Summary

static String	c2hex(Color c) Converts a Color to an 7 byte hex string starting with '#'.
static String	f2hex(float f) Converts a float to an 9 byte hex string starting with '#'.
static String	fixNewLines(String s) 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 double[]	getMinMax(double[] a)
static double[]	getMinMax(float[] a)
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/Macro_Tool.txt").
static double	parseDouble(String s) Returns a double containg the value represented by the specified String.
static double	parseDouble(String s, double defaultValue) Returns a double containg the value represented by the specified String.
static int[]	rank(double[] values) Returns a sorted list of indices of the specified double array.
static int[]	rank(String[] data) Returns a sorted list of indices of the specified String array.
static String[]	split(String str) Splits a string into substrings using the default delimiter set, which is " \t\n\r" (space, tab, newline and carriage-return).
static String[]	split(String str, String delim) 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.

Methods inherited from class java.lang.Object

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

Field Detail

hexDigits

public static final char[] hexDigits

This array contains the 16 hex digits '0'-'F'.

Constructor Detail

Tools

public Tools()

Method Detail

c2hex

public static String c2hex(Color c)

Converts a Color to an 7 byte hex string starting with '#'.

f2hex

public static String f2hex(float f)

Converts a float to an 9 byte hex string starting with '#'.

int2hex

public static String int2hex(int i,
                             int digits)

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.

getMinMax

public static double[] getMinMax(double[] a)

getMinMax

public static double[] getMinMax(float[] a)

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.

fixNewLines

public static String fixNewLines(String s)

Converts carriage returns to line feeds.

parseDouble

public static double parseDouble(String s,
                                 double defaultValue)

Returns a double containg the value represented by the specified String.

Parameters:

s - the string to be parsed.

defaultValue - the value returned if s 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

parseDouble

public static double parseDouble(String s)

Returns a double containg the value represented by the specified String.

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

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

public static String[] split(String str)

Splits a string into substrings using the default delimiter set, which is " \t\n\r" (space, tab, newline and carriage-return).

split

public static String[] split(String str,
                             String delim)

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

public static int[] rank(String[] data)

Returns a sorted list of indices of the specified String array.

openFromIJJarAsString

public static String openFromIJJarAsString(String path)

Opens a text file in ij.jar as a String (example path: "/macros/Macro_Tool.txt").