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# representation

Greenhorn
Posts: 23
what does this ('\141' )representation mean
aval = '\141';
System.out.println(" val of a : " + aval);
we get " val of a : " a
'\141' is a...

Greenhorn
Posts: 15

This is the octal representation of a character. For a hexadecimal representation use '\u0141'
The output will be different in each case
[This message has been edited by Saritha Pilla (edited March 07, 2000).]
[This message has been edited by Saritha Pilla (edited March 07, 2000).]

Ranch Hand
Posts: 1467
And one more point regarding this.
The octal escape representaton of a char has the foll. format
'\digit1 digit2 digit3' //here digit1 can be '\[0-3]', digit2 and digit3 can be '\[0-7]'
'\digit1 digit2' //here digit1 and digit2 BOTH can be '\[0-7]'
'\digit1' //here digit1 can be '\[0-7]'
Eg.
char c1 = '\377'; //ok
char c2 = '\477'; // NOT ok
char c3 = '\77'; //ok
char c1 = '\7'; //ok
regds
maha anna

[This message has been edited by maha anna (edited March 07, 2000).]

Greenhorn
Posts: 19
Hi Saritha,
octal representation starts with 0 right?, how come '141' is octal.?, can you please share your thought.
Related question, if there is int like 6, how do you write in hexadecimal form, my answer is 0x0006. Is it correct.
Thanks

Ranch Hand
Posts: 53

> aval = '\141';
just think of it this way:
octal 141 -> decimal 97 -> ascii code for 'a'

maha anna
Ranch Hand
Posts: 1467
The difference is 0141 is an octal representation of a number. But '\141' is the octal escape sequence representation.
char c1 = 0141;
char c2= '\141'; BOTH staments represent the SAME char of decimal value 97
I hope this helps.
regds
maha anna.

Wanderer
Posts: 18671
[ ignore this post, it's incorrect - I'd delete it, but then maha anna's post wouldn't make sense. - Jim ]
The octal and hex escape sequences are for use inside single or double quotes, to represent an individual character. Outside of quotes, they don't work.
[This message has been edited by Jim Yingst (edited March 07, 2000).]

maha anna
Ranch Hand
Posts: 1467
Jim,
This code seems to work and creates a dir structure ./ABC/DEF
when you compile with these options "javac -d . test.java".
If I understand you correctly, do you mean to say the foll. code is not a valid code ?
regds
maha anna

Jim Yingst
Wanderer
Posts: 18671
Ummm...
Yes, that is what I meant. Evidently I was wrong. Oops - thanks m.a.!

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