U+EFDF

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U+EFDF is not a valid unicode character.
Encodings
HTML Entity (decimal) 
HTML Entity (hex) 
How to type in Microsoft Windows Alt +EFDF
UTF-8 (hex) 0xEE 0xBF 0x9F (eebf9f)
UTF-8 (binary) 11101110:10111111:10011111
UTF-16 (hex) 0xEFDF (efdf)
UTF-16 (decimal) 61,407
UTF-32 (hex) 0x0000EFDF (efdf)
UTF-32 (decimal) 61,407
C/C++/Java source code "\uEFDF"
Python source code u"\uEFDF"
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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