This has probably been answered else where but how do you get the character value of an int value?
Specifically I'm reading a from a tcp stream and the readers .read() method returns an int.
How do I get a char from this?
+2
A:
Simple casting:
int a = 99;
char c = (char) a;
Is there any reason this is not working for you?
Yuval A
2009-05-07 09:34:38
Dangerous advice, if the text stream is not pure ASCII. See Jon Skeet's answer above.
sleske
2009-05-07 09:54:03
It might not work. But I think it would actually. The char data type stores UTF-16 coded value. So to cast char to int you need to do some transformations. But since the OP uses read() method which already returns UTF-16 coded value simple casting would work I think. Correct me if I wrong.
Vanuan
2009-05-07 11:09:16
Sorry, I meant "from int to char"
Vanuan
2009-05-07 21:39:14
+12
A:
If you're trying to convert a stream into text, you need to be aware of which encoding you want to use. You can then either pass an array of bytes into the String constructor and provide a Charset, or use InputStreamReader with the appropriate Charset instead.
Simply casting from int to char only works if you want ISO-8859-1, if you're reading bytes from a stream directly.
EDIT: If you are already using a Reader, then casting the return value of read() to char is the right way to go (after checking whether it's -1 or not)... but it's normally more efficient and convenient to call read(char[], int, int) to read a whole block of text at a time. Don't forget to check the return value though, to see how many characters have been read.
Jon Skeet
2009-05-07 09:48:34
I think this is not what the OP is asking about. He is using Reader's read method: http://java.sun.com/j2se/1.4.2/docs/api/java/io/Reader.html#read() The question he is asking is how to convert value returned by this method into char.
Vanuan
2009-05-07 21:43:21
If he's genuinely using Reader, that certainly makes a difference. It's not clear, given that he talks about a stream and a reader (with a lower case r) in the same sentence :( Have edited my answer to make this clear.
Jon Skeet
2009-05-07 23:20:26
+4
A:
Hi,
Maybe you are asking for:
Character.toChars(65) // returns ['A']
More info: http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Character.html#toChars(int)
ATorras
2009-05-07 10:05:48
That's only valid if the integer in question is already a UTF-16 code point. We have no idea whether that's the case.
Jon Skeet
2009-05-07 16:34:55
@Atec: No, my point is that if he's just reading bytes from a stream (it's not clear) then converting by just casting or using `toChars` is usually inappropriate. If he's reading from a Reader, then it's fine.
Jon Skeet
2009-05-07 23:21:25