Marcus Green #3 Question 33

[John Towell]

Question 33)
Which of the following statements are true?
1) Java uses a system called UTF for I/O to support international character sets
2) The RandomAccessFile is the most suitable class for supporting international character sets
3) An instance of FileInputStream may not be chained to an instance of FileOutputStream
4) File I/O activities requires use of Exception handling
Answer = 1,3,4
Answer 1 should be UTF-8 right? I don't know if there are different UTFs, but I didn't check it since it didn't say UTF-8.

[Jose Botella]

Read more about Unicode here

[John Towell]

Coll thanks for the link. So the answer should be UTF-8 right?

[Jose Botella]

Not necessarily.
For internationalization you can use charsetsfor converting between Java characters or strings and the especified charset.
The following charsets must be supported:

US-ASCII Seven-bit ASCII, a.k.a. ISO646-US, a.k.a. the Basic Latin block of the Unicode character set
ISO-8859-1 ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1
UTF-8 Eight-bit UCS Transformation Format
UTF-16BE Sixteen-bit UCS Transformation Format, big-endian byte order
UTF-16LE Sixteen-bit UCS Transformation Format, little-endian byte order
UTF-16 Sixteen-bit UCS Transformation Format, byte order identified by an optional byte-order mark

You can pass them as parameters to the InputStreamReader and OutputStreamWriter constructors.
Also you can pass a charset to the
String.getBytes(String) method.
Not passing any charset to these methods will let the JVM to use the platform default.