question on unicode

[Abacus White]

class JSC201 {
static byte m1() {
final char c = '\u0001';
return c; // 1
}
static byte m3(final char c) {return c;} // 2
public static void main(String[] args) {
char c = '\u0003';
System.out.print(""+m1()+m3(c));
}}

What is the result of attempting to compile and run the program?
a. Prints: 13
b. Prints: 4
c. Compile-time error at 1
d. Compile-time error at 2
e. Run-time error
f. None of the above

[Corey McGlone]

So what's your question? I assume you're quite capable of compiling and executing yourself, so what are you confused about?

[Abacus White]

f.java: In class `f':
f.java: In method `f.m1()':
f.java:33665: warning: Constant expression `0xfc00000003' too wide for narrowing primitive conversion to `byte'.
<<file too short - unexpected EOF>>


This is the outcome.I would like to know as to why this occured.

[Corey McGlone]

Hmmm...that is not the output I received. When trying to compile that, I got this:

JSC021.java:9: possible loss of precision
found    : char
required : byte
    static byte m3(final char c) {return c;} //2
 
1 error

That error makes perfect sense as you can't implictly cast a char to a byte as going from a char to a byte is a narrowing conversion.

I'm not sure why you're getting the error you are. What version of Java are you comiling on?

[Abacus White]

i'm using j2sdk1.4.1_01