public static int lengthOfCodePoint(int codePoint)
    {
        if (codePoint < 0) {
            throw new InvalidCodePointException(codePoint);
        }
        if (codePoint < 0x80) {
            // normal ASCII
            // 0xxx_xxxx
            return 1;
        }
        if (codePoint < 0x800) {
            return 2;
        }
        if (codePoint < 0x1_0000) {
            return 3;
        }
        if (codePoint < 0x11_0000) {
            return 4;
        }
        // Per RFC3629, UTF-8 is limited to 4 bytes, so more bytes are illegal
        throw new InvalidCodePointException(codePoint);
    }
public static int lengthOfCodePoint ( int codePoint ) { if ( codePoint < 0 ) { throw new InvalidCodePointException ( codePoint ) ; } if ( codePoint < 0x80 ) { return 1 ; } if ( codePoint < 0x800 ) { return 2 ; } if ( codePoint < 0x1_0000 ) { return 3 ; } if ( codePoint < 0x11_0000 ) { return 4 ; } throw new InvalidCodePointException ( codePoint ) ; }
Gets the UTF-8 sequence length of the code point.

@throws InvalidCodePointException if code point is not within a valid range