U+F1BF

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U+F1BF is not a valid unicode character.
Encodings
HTML Entity (decimal) 
HTML Entity (hex) 
How to type in Microsoft Windows Alt +F1BF
UTF-8 (hex) 0xEF 0x86 0xBF (ef86bf)
UTF-8 (binary) 11101111:10000110:10111111
UTF-16 (hex) 0xF1BF (f1bf)
UTF-16 (decimal) 61,887
UTF-32 (hex) 0x0000F1BF (f1bf)
UTF-32 (decimal) 61,887
C/C++/Java source code "\uF1BF"
Python source code u"\uF1BF"
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Java Data
string.toUpperCase()
string.toLowerCase()
Character.UnicodeBlock PRIVATE_USE_AREA
Character.charCount() 1
Character.getDirectionality() DIRECTIONALITY_LEFT_TO_RIGHT [0]
Character.getNumericValue() -1
Character.getType() 18
Character.isDefined() Yes
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