Is there a drastic difference between UTF-8 and UTF-16

Question

I call a webservice, that gives me back a response xml that has UTF-8 encoding. I checked that in java using getAllHeaders() method.

Now, in my java cod

Answer 1

This Website provide UTF TO UTF Conversion

http://www.fileformat.info/convert/text/utf2utf.htm

UTF-32 is arguably the most human-readable of the Unicode Encoding Forms, because its big-endian hexadecimal representation is simply the Unicode Scalar Value without the “U+” prefix and zero-padded to eight digits and While a UTF-32 representation does make the programming model somewhat simpler, the increased average storage size has real drawbacks, making a complete transition to UTF-32 less compelling.

HOWEVER

UTF-32 is the same as the old UCS-4 encoding and remains fixed width. Why can this remain fixed width? As UTF-16 is now the format that can encode the least amount of characters it set the limit for all formats. It was defined that 1,112,064 was the total number of code points that will ever be defined by either Unicode or ISO 10646. Since Unicode is now only defined from 0 to 10FFFF UTF-32 sounds a bit like a pointless encoding now as it's 32 bit wide, but only ever about 21 bits are used which makes this very wasteful.