How do I turn a String into a InputStreamReader in java?
JavaStringStreamJava Problem Overview
How can I transform a String
value into an InputStreamReader
?
Java Solutions
Solution 1 - Java
ByteArrayInputStream also does the trick:
InputStream is = new ByteArrayInputStream( myString.getBytes( charset ) );
Then convert to reader:
InputStreamReader reader = new InputStreamReader(is);
Solution 2 - Java
I also found the apache commons IOUtils
class , so :
InputStreamReader isr = new InputStreamReader(IOUtils.toInputStream(myString));
Solution 3 - Java
Does it have to be specifically an InputStreamReader? How about using StringReader?
Otherwise, you could use StringBufferInputStream, but it's deprecated because of character conversion issues (which is why you should prefer StringReader).
Solution 4 - Java
Same question as @Dan - why not StringReader ?
If it has to be InputStreamReader, then:
String charset = ...; // your charset
byte[] bytes = string.getBytes(charset);
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
InputStreamReader isr = new InputStreamReader(bais);
Solution 5 - Java
Are you trying to get a) Reader
functionality out of InputStreamReader
, or b) InputStream
functionality out of InputStreamReader
? You won't get b). InputStreamReader
is not an InputStream
.
The purpose of InputStreamReader
is to take an InputStream
- a source of bytes - and decode the bytes to chars in the form of a Reader
. You already have your data as chars (your original String). Encoding your String into bytes and decoding the bytes back to chars would be a redundant operation.
If you are trying to get a Reader
out of your source, use StringReader
.
If you are trying to get an InputStream
(which only gives you bytes), use apache commons IOUtils.toInputStream(..)
as suggested by other answers here.
Solution 6 - Java
You can try Cactoos:
InputStream stream = new InputStreamOf(str);
Then, if you need a Reader
:
Reader reader = new ReaderOf(stream);