Valid char values!

[fethi makhlouf]

Hello
i thought i am well prepared for the exam, but when i met that example, i undrestood i am not yet!
public class Test002 extends Super
{
public static void main(String args[])
{
char c1 = '\u00AA';
char c2 = '\u00DD';
char c3 = '\u000D';
char c4 = '\u000A';
}
}

can somone tell me why c1 and c2 are valid values wheras c3 and c4 are not!
Thank you in advance!

[Bijesh Krishnadas]

Originally posted by fethi makhlouf:

char c2 = '\u00DD';
char c3 = '\u000D';
char c4 = '\u000A';
}
}

can somone tell me why c1 and c2 are valid values wheras c3 and c4 are not!

Firstly,
/u000d represents carriage return
/u000a represents new line
Now the first thing that the compiler does is convert the unicode into the respective characters. This happens, I guess, even before the actual compilation process starts.
So the c3 and c4 lines when passed to the compiler would look like this

 
char c3 = 
;         
char c4 = 
;

So ur code above is equivalent to the one below:

public class Test002 extends Super
{ 
public static void main(String args[])
{
char c1 = '<%1>';
char c2 = '<%2>'; 
char c3 = 
; 
char c4 = 
; 
} 
}
NOTE:
<%1> - whatever \u00AA represents
<%2> - whatever \u00DD represents

and hence the compile error.