Unicode Character 'ZERO WIDTH NO-BREAK SPACE' (U+FEFF)

Unicode Character 'ZERO WIDTH NO-BREAK SPACE' (U+FEFF)

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Unicode Data
Name ZERO WIDTH NO-BREAK SPACE
Block Arabic Presentation Forms-B
Category Other, Format [Cf]
Combine 0
BIDI Boundary Neutral [BN]
Mirror N
Old name BYTE ORDER MARK
Version Unicode 1.1.0 (June, 1993)
Encodings
HTML Entity (decimal) 
HTML Entity (hex) 
How to type in Microsoft Windows Alt +FEFF
UTF-8 (hex) 0xEF 0xBB 0xBF (efbbbf)
UTF-8 (binary) 11101111:10111011:10111111
UTF-16 (hex) 0xFEFF (feff)
UTF-16 (decimal) 65,279
UTF-32 (hex) 0x0000FEFF (feff)
UTF-32 (decimal) 65,279
C/C++/Java source code "\uFEFF"
Python source code u"\uFEFF"
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Java Data
string.toUpperCase() 
string.toLowerCase() 
Character.UnicodeBlock ARABIC_PRESENTATION_FORMS_B
Character.charCount() 1
Character.getDirectionality() DIRECTIONALITY_BOUNDARY_NEUTRAL [9]
Character.getNumericValue() -1
Character.getType() 16
Character.isDefined() Yes
Character.isDigit() No
Character.isIdentifierIgnorable() Yes
Character.isISOControl() No
Character.isJavaIdentifierPart() Yes
Character.isJavaIdentifierStart() No
Character.isLetter() No
Character.isLetterOrDigit() No
Character.isLowerCase() No
Character.isMirrored() No
Character.isSpaceChar() No
Character.isSupplementaryCodePoint() No
Character.isTitleCase() No
Character.isUnicodeIdentifierPart() Yes
Character.isUnicodeIdentifierStart() No
Character.isUpperCase() No
Character.isValidCodePoint() Yes
Character.isWhitespace() No