U+EF3F

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U+EF3F is not a valid unicode character.
Encodings
HTML Entity (decimal) 
HTML Entity (hex) 
How to type in Microsoft Windows Alt +EF3F
UTF-8 (hex) 0xEE 0xBC 0xBF (eebcbf)
UTF-8 (binary) 11101110:10111100:10111111
UTF-16 (hex) 0xEF3F (ef3f)
UTF-16 (decimal) 61,247
UTF-32 (hex) 0x0000EF3F (ef3f)
UTF-32 (decimal) 61,247
C/C++/Java source code "\uEF3F"
Python source code u"\uEF3F"
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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