Utilities (iText Core 5.5.13.2 API)

java.lang.Object
- com.itextpdf.text.Utilities

```
public class Utilities
extends Object
```
A collection of convenience methods that were present in many different iText classes.

Constructor Summary

Constructors
Constructor and Description

Utilities()

Constructors
Constructor and Description
`Utilities()`

Method Summary

All Methods Static Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`static Object[][]`	`addToArray(Object[][] original, Object[] item)` Utility method to extend an array.
`static boolean`	`checkTrueOrFalse(Properties attributes, String key)` Checks for a true/false value of a key in a Properties object.
`static String`	`convertFromUtf32(int codePoint)` Converts a UTF32 code point value to a String with the corresponding character(s).
`static String`	`convertToHex(byte[] bytes)` Converts an array of bytes to a String of hexadecimal values
`static int`	`convertToUtf32(char[] text, int idx)` Converts a unicode character in a character array to a UTF 32 code point value.
`static int`	`convertToUtf32(char highSurrogate, char lowSurrogate)` Returns the code point of a UTF32 character corresponding with a high and a low surrogate value.
`static int`	`convertToUtf32(String text, int idx)` Converts a unicode character in a String to a UTF32 code point value
`static char[]`	`copyOfRange(char[] original, int from, int to)` Copies the specified range of the specified array into a new array.
`static <K,V> Set<K>`	`getKeySet(Hashtable<K,V> table)` Deprecated.
`static float`	`inchesToMillimeters(float value)` Measurement conversion from inches to millimeters.
`static float`	`inchesToPoints(float value)` Measurement conversion from inches to points.
`static boolean`	`isSurrogateHigh(char c)` Check if the value of a character belongs to a certain interval that indicates it's the higher part of a surrogate pair.
`static boolean`	`isSurrogateLow(char c)` Check if the value of a character belongs to a certain interval that indicates it's the lower part of a surrogate pair.
`static boolean`	`isSurrogatePair(char[] text, int idx)` Checks if two subsequent characters in a character array are are the higher and the lower character in a surrogate pair (and therefore eligible for conversion to a UTF 32 character).
`static boolean`	`isSurrogatePair(String text, int idx)` Checks if two subsequent characters in a String are are the higher and the lower character in a surrogate pair (and therefore eligible for conversion to a UTF 32 character).
`static float`	`millimetersToInches(float value)` Measurement conversion from millimeters to inches.
`static float`	`millimetersToPoints(float value)` Measurement conversion from millimeters to points.
`static float`	`pointsToInches(float value)` Measurement conversion from points to inches.
`static float`	`pointsToMillimeters(float value)` Measurement conversion from points to millimeters.
`static String`	`readFileToString(File file)` Reads the contents of a file to a String.
`static String`	`readFileToString(String path)` Reads the contents of a file to a String.
`static void`	`skip(InputStream is, int size)` This method is an alternative for the `InputStream.skip()` -method that doesn't seem to work properly for big values of `size`.
`static URL`	`toURL(String filename)` This method makes a valid URL from a given filename.
`static String`	`unEscapeURL(String src)` Unescapes an URL.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Utilities
```
public Utilities()
```
- Method Detail
  - getKeySet
```
@Deprecated
public static <K,V> Set<K> getKeySet(Hashtable<K,V> table)
```
    Deprecated.
    
    Gets the keys of a Hashtable. Marked as deprecated, not used anywhere anymore.
    
    Type Parameters:
    
    K - type for the key
    
    V - type for the value
    
    Parameters:
    
    table - a Hashtable
    
    Returns:
    
    the keyset of a Hashtable (or an empty set if table is null)
  - addToArray
```
public static Object[][] addToArray(Object[][] original,
                                    Object[] item)
```
    Utility method to extend an array.
    
    Parameters:
    
    original - the original array or null
    
    item - the item to be added to the array
    
    Returns:
    
    a new array with the item appended
  - checkTrueOrFalse
```
public static boolean checkTrueOrFalse(Properties attributes,
                                       String key)
```
    Checks for a true/false value of a key in a Properties object.
    
    Parameters:
    
    attributes -
    
    key -
    
    Returns:
    
    a true/false value of a key in a Properties object
  - unEscapeURL
```
public static String unEscapeURL(String src)
```
    Unescapes an URL. All the "%xx" are replaced by the 'xx' hex char value.
    
    Parameters:
    
    src - the url to unescape
    
    Returns:
    
    the unescaped value
  - toURL
```
public static URL toURL(String filename)
                 throws MalformedURLException
```
    This method makes a valid URL from a given filename.
    This method makes the conversion of this library from the JAVA 2 platform to a JDK1.1.x-version easier.
    
    Parameters:
    
    filename - a given filename
    
    Returns:
    
    a valid URL
    
    Throws:
    
    MalformedURLException
  - skip
```
public static void skip(InputStream is,
                        int size)
                 throws IOException
```
    This method is an alternative for the InputStream.skip() -method that doesn't seem to work properly for big values of size.
    
    Parameters:
    
    is - the InputStream
    
    size - the number of bytes to skip
    
    Throws:
    
    IOException
  - millimetersToPoints
```
public static final float millimetersToPoints(float value)
```
    Measurement conversion from millimeters to points.
    
    Parameters:
    
    value - a value in millimeters
    
    Returns:
    
    a value in points
    
    Since:
    
    2.1.2
  - millimetersToInches
```
public static final float millimetersToInches(float value)
```
    Measurement conversion from millimeters to inches.
    
    Parameters:
    
    value - a value in millimeters
    
    Returns:
    
    a value in inches
    
    Since:
    
    2.1.2
  - pointsToMillimeters
```
public static final float pointsToMillimeters(float value)
```
    Measurement conversion from points to millimeters.
    
    Parameters:
    
    value - a value in points
    
    Returns:
    
    a value in millimeters
    
    Since:
    
    2.1.2
  - pointsToInches
```
public static final float pointsToInches(float value)
```
    Measurement conversion from points to inches.
    
    Parameters:
    
    value - a value in points
    
    Returns:
    
    a value in inches
    
    Since:
    
    2.1.2
  - inchesToMillimeters
```
public static final float inchesToMillimeters(float value)
```
    Measurement conversion from inches to millimeters.
    
    Parameters:
    
    value - a value in inches
    
    Returns:
    
    a value in millimeters
    
    Since:
    
    2.1.2
  - inchesToPoints
```
public static final float inchesToPoints(float value)
```
    Measurement conversion from inches to points.
    
    Parameters:
    
    value - a value in inches
    
    Returns:
    
    a value in points
    
    Since:
    
    2.1.2
  - isSurrogateHigh
```
public static boolean isSurrogateHigh(char c)
```
    Check if the value of a character belongs to a certain interval that indicates it's the higher part of a surrogate pair.
    
    Parameters:
    
    c - the character
    
    Returns:
    
    true if the character belongs to the interval
    
    Since:
    
    2.1.2
  - isSurrogateLow
```
public static boolean isSurrogateLow(char c)
```
    Check if the value of a character belongs to a certain interval that indicates it's the lower part of a surrogate pair.
    
    Parameters:
    
    c - the character
    
    Returns:
    
    true if the character belongs to the interval
    
    Since:
    
    2.1.2
  - isSurrogatePair
```
public static boolean isSurrogatePair(String text,
                                      int idx)
```
    Checks if two subsequent characters in a String are are the higher and the lower character in a surrogate pair (and therefore eligible for conversion to a UTF 32 character).
    
    Parameters:
    
    text - the String with the high and low surrogate characters
    
    idx - the index of the 'high' character in the pair
    
    Returns:
    
    true if the characters are surrogate pairs
    
    Since:
    
    2.1.2
  - isSurrogatePair
```
public static boolean isSurrogatePair(char[] text,
                                      int idx)
```
    Checks if two subsequent characters in a character array are are the higher and the lower character in a surrogate pair (and therefore eligible for conversion to a UTF 32 character).
    
    Parameters:
    
    text - the character array with the high and low surrogate characters
    
    idx - the index of the 'high' character in the pair
    
    Returns:
    
    true if the characters are surrogate pairs
    
    Since:
    
    2.1.2
  - convertToUtf32
```
public static int convertToUtf32(char highSurrogate,
                                 char lowSurrogate)
```
    Returns the code point of a UTF32 character corresponding with a high and a low surrogate value.
    
    Parameters:
    
    highSurrogate - the high surrogate value
    
    lowSurrogate - the low surrogate value
    
    Returns:
    
    a code point value
    
    Since:
    
    2.1.2
  - convertToUtf32
```
public static int convertToUtf32(char[] text,
                                 int idx)
```
    Converts a unicode character in a character array to a UTF 32 code point value.
    
    Parameters:
    
    text - a character array that has the unicode character(s)
    
    idx - the index of the 'high' character
    
    Returns:
    
    the code point value
    
    Since:
    
    2.1.2
  - convertToUtf32
```
public static int convertToUtf32(String text,
                                 int idx)
```
    Converts a unicode character in a String to a UTF32 code point value
    
    Parameters:
    
    text - a String that has the unicode character(s)
    
    idx - the index of the 'high' character
    
    Returns:
    
    the codepoint value
    
    Since:
    
    2.1.2
  - convertFromUtf32
```
public static String convertFromUtf32(int codePoint)
```
    Converts a UTF32 code point value to a String with the corresponding character(s).
    
    Parameters:
    
    codePoint - a Unicode value
    
    Returns:
    
    the corresponding characters in a String
    
    Since:
    
    2.1.2
  - readFileToString
```
public static String readFileToString(String path)
                               throws IOException
```
    Reads the contents of a file to a String.
    
    Parameters:
    
    path - the path to the file
    
    Returns:
    
    a String with the contents of the file
    
    Throws:
    
    IOException
    
    Since:
    
    iText 5.0.0
  - readFileToString
```
public static String readFileToString(File file)
                               throws IOException
```
    Reads the contents of a file to a String.
    
    Parameters:
    
    file - a file
    
    Returns:
    
    a String with the contents of the file
    
    Throws:
    
    IOException - if file was not found or could not be read.
    
    Since:
    
    iText 5.0.0
  - convertToHex
```
public static String convertToHex(byte[] bytes)
```
    Converts an array of bytes to a String of hexadecimal values
    
    Parameters:
    
    bytes - a byte array
    
    Returns:
    
    the same bytes expressed as hexadecimal values
  - copyOfRange
```
public static char[] copyOfRange(char[] original,
                                 int from,
                                 int to)
```
    Copies the specified range of the specified array into a new array. The initial index of the range (from) must lie between zero and original.length, inclusive. The value at original[from] is placed into the initial element of the copy (unless from == original.length or from == to). Values from subsequent elements in the original array are placed into subsequent elements in the copy. The final index of the range (to), which must be greater than or equal to from, may be greater than original.length, in which case '\\u000' is placed in all elements of the copy whose index is greater than or equal to original.length - from. The length of the returned array will be to - from.
    
    Parameters:
    
    original - the array from which a range is to be copied
    
    from - the initial index of the range to be copied, inclusive
    
    to - the final index of the range to be copied, exclusive. (This index may lie outside the array.)
    
    Returns:
    
    a new array containing the specified range from the original array, truncated or padded with null characters to obtain the required length
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if from < 0 or from > original.length
    
    IllegalArgumentException - if from > to
    
    NullPointerException - if original is null
    
    Since:
    
    1.6

Class Utilities

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Utilities

Method Detail

getKeySet

addToArray

checkTrueOrFalse

unEscapeURL

toURL

skip

millimetersToPoints

millimetersToInches

pointsToMillimeters

pointsToInches

inchesToMillimeters

inchesToPoints

isSurrogateHigh

isSurrogateLow

isSurrogatePair

isSurrogatePair

convertToUtf32

convertToUtf32

convertToUtf32

convertFromUtf32

readFileToString

readFileToString

convertToHex

copyOfRange