U+FEFE

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U+FEFE is not a valid unicode character.
Encodings
HTML Entity (decimal) ﻾
HTML Entity (hex) ﻾
How to type in Microsoft Windows Alt +FEFE
UTF-8 (hex) 0xEF 0xBB 0xBE (efbbbe)
UTF-8 (binary) 11101111:10111011:10111110
UTF-16 (hex) 0xFEFE (fefe)
UTF-16 (decimal) 65,278
UTF-32 (hex) 0x0000FEFE (fefe)
UTF-32 (decimal) 65,278
C/C++/Java source code "\uFEFE"
Python source code u"\uFEFE"
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Java Data
string.toUpperCase()
string.toLowerCase()
Character.UnicodeBlock ARABIC_PRESENTATION_FORMS_B
Character.charCount() 1
Character.getDirectionality() DIRECTIONALITY_UNDEFINED [-1]
Character.getNumericValue() -1
Character.getType() 0
Character.isDefined() No
Character.isDigit() No
Character.isIdentifierIgnorable() No
Character.isISOControl() No
Character.isJavaIdentifierPart() No
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() No
Character.isUnicodeIdentifierStart() No
Character.isUpperCase() No
Character.isValidCodePoint() Yes
Character.isWhitespace() No