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java.lang.Objectjava.io.Reader
java.io.InputStreamReader
@TransactionType(value=NOT_SUPPORTED) public class InputStreamReader
An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and translates them into characters. The encoding that it uses may be specified by name, or the platform's default encoding may be accepted.
Each invocation of one of an InputStreamReader's read() methods may cause one or more bytes to be read from the underlying byte input stream. To enable the efficient conversion of bytes to characters, more bytes may be read ahead from the underlying stream than are necessary to satisfy the current read operation.
Reader
,
UnsupportedEncodingException
Field Summary |
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Fields inherited from class java.io.Reader |
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lock |
Constructor Summary | |
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InputStreamReader(InputStream is)
Create an InputStreamReader that uses the default character encoding. |
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InputStreamReader(InputStream is,
String enc)
Create an InputStreamReader that uses the named character encoding. |
Method Summary | |
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void |
close()
Close the stream. |
int |
read()
Read a single character. |
int |
read(char[] cbuf,
int off,
int len)
Read characters into a portion of an array. |
boolean |
ready()
Tell whether this stream is ready to be read. |
Methods inherited from class java.io.Reader |
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mark, markSupported, read, reset, skip |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public InputStreamReader(InputStream is)
is
- An InputStreampublic InputStreamReader(InputStream is, String enc) throws UnsupportedEncodingException
is
- An InputStreamenc
- The name of a supported character encoding
UnsupportedEncodingException
- If the named encoding is not supportedMethod Detail |
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public int read() throws IOException
read
in class Reader
IOException
- If an I/O error occurspublic int read(char[] cbuf, int off, int len) throws IOException
read
in class Reader
cbuf
- Destination bufferoff
- Offset at which to start storing characterslen
- Maximum number of characters to read
IOException
- If an I/O error occurspublic boolean ready() throws IOException
ready
in class Reader
IOException
- If an I/O error occurspublic void close() throws IOException
close
in class Reader
IOException
- If an I/O error occurs
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