Package ij.util

Class Tools

java.lang.Object
ij.util.Tools
public class Tools
extends Object
This class contains static utility methods.

  • Field Summary

    Fields 
    Modifier and Type Field Description
    static char[] hexDigits
    This array contains the 16 hex digits '0'-'F'.

  • Constructor Summary

    Constructors 
    Constructor Description
    Tools()  

  • Method Summary

    Modifier and Type Method Description
    static void addToArray​(float[] a, float value)
    Adds a number to all array elements
    static String c2hex​(Color c)
    Converts a Color to an 7 byte hex string starting with '#'.
    static String copyFile​(String path1, String path2)
    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 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 ImageStatistics getStatistics​(double[] 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/Circle_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 double[] resampleArray​(double[] y1, int len2)
    Returns an array linearly resampled to a different length.
    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 Details

    • hexDigits

      public static final char[] hexDigits
      This array contains the 16 hex digits '0'-'F'.

  • Constructor Details

  • Method Details

    • 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.

    • getStatistics

      public static ImageStatistics getStatistics​(double[] a)

    • 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.

    • addToArray

      public static void addToArray​(float[] a, float value)
      Adds a number to all array elements

    • 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.

    • resampleArray

      public static double[] resampleArray​(double[] y1, int len2)
      Returns an array linearly resampled to a different length.

    • openFromIJJarAsString

      public static String openFromIJJarAsString​(String path)
      Opens a text file in ij.jar as a String (example path: "/macros/Circle_Tool.txt").

    • copyFile

      public static String copyFile​(String path1, String path2)
      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.