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char doubt

Syed Naimathullah
Greenhorn

Joined: Feb 18, 2007
Posts: 17
it is giving compile time error at line 1,5

class MCZ11 {
public static void main (String[] args) {
char a = '\c'; //line 1
char b = '\r';
char c = '\"';
char d = '\b';
char e = '\p'; //line 5
}}
please explain me why
Akhilesh Trivedi
Ranch Hand

Joined: Jun 22, 2005
Posts: 1527
Look for escap sequences in java.


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anshi kohli
Ranch Hand

Joined: Jun 30, 2007
Posts: 35
char range is 0-65535 verified with K&B book but pg 69 of khalid says its 0-65536(which is wrong i believe).

please correct if i m wrong?
Akhilesh Trivedi
Ranch Hand

Joined: Jun 22, 2005
Posts: 1527
I would have go home to check pg 69. Still I can vote for 0-65535 range today. Will be back here tomorrow.
Hasan Moulana
Greenhorn

Joined: Jul 11, 2007
Posts: 1
Hi,

char a = '\c'; //line 1
char b = '\r';
char c = '\"';
char d = '\b';
char e = '\p'; //line 5

why we use \ inside the quotes is to the characters ', ", ` and for backspace (\b), carriage return (\r) and line feed (\n).

I think (\p) does not mean any thing. thtsy it is throwing error.

char a = '\r'; //line 1
char b = '\b';
char c = '\"';
char d = 'b';
char e = 'p'; //line 5

if you execute this, it wont show the error.
marc weber
Sheriff

Joined: Aug 31, 2004
Posts: 11343

The following are common escape sequences in Java:
  • \b = backspace
  • \f = form feed
  • \n = new line
  • \r = return
  • \t = tab
  • \' = single-quote literal
  • \" = double-quote literal
  • \\ = backslash literal
  • And here's a memory device for remembering the first 5: "Big Farms Need Red Tractors." (\b, \f, \n, \r, \t)
    [ July 12, 2007: Message edited by: marc weber ]

    "We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer
    sscce.org
    Priyam Srivastava
    Ranch Hand

    Joined: Oct 29, 2006
    Posts: 169
    thanks Marc for that memory device !!!


    "History would be kind to me, for I intend to write it."
    Akhilesh Trivedi
    Ranch Hand

    Joined: Jun 22, 2005
    Posts: 1527
    Originally posted by anshi kohli:
    char range is 0-65535 verified with K&B book but pg 69 of khalid says its 0-65536(which is wrong i believe).

    please correct if i m wrong?


    Hello anshi! me back here. My book titled A programmers guide to java certification by Khalid Mughal and Rolf. W. Rasmussen, second edition with Indian print coyrighted 2004, at page 29 says, second paragraph first line says... "Their values are unsigned integers that denote all the 65536(2^16) characters in the 16-bit unicode character set."

    So the actual set of characters is 65536, but when you say 'range', it actually starts with 0 and ends up with one minus of the total... cho chimple right. have fun.
    Jared Folino
    Greenhorn

    Joined: Apr 27, 2007
    Posts: 25
    A good accronym is
    farms
    nneed
    big
    red
    tractors
     
    It is sorta covered in the JavaRanch Style Guide.
     
    subject: char doubt