Class InputStreamReader

java.lang.Object
java.io.Reader
java.io.InputStreamReader
All Implemented Interfaces:
java.lang.AutoCloseable
public class InputStreamReader extends Reader
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. Since: CLDC 1.0 See Also:Reader, UnsupportedEncodingException

  • Field Summary

    Fields inherited from class Reader

    lock

  • Constructor Summary

    Constructors
    Constructor
    Description
    InputStreamReader(InputStream is)
    Create an InputStreamReader that uses the default character encoding.
    InputStreamReader(InputStream is, java.lang.String enc)
    Create an InputStreamReader that uses the named character encoding.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    close()
    Close the stream.
    void
    mark(int readAheadLimit)
    Mark the present position in the stream.
    boolean
    markSupported()
    Tell whether this stream supports the mark() operation.
    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.
    void
    reset()
    Reset the stream.
    long
    skip(long n)
    Skip characters.

    Methods inherited from class Reader

    read

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • InputStreamReader

      public InputStreamReader(InputStream is)
      Create an InputStreamReader that uses the default character encoding. is - An InputStream

    • InputStreamReader

      public InputStreamReader(InputStream is, java.lang.String enc) throws UnsupportedEncodingException

      Create an InputStreamReader that uses the named character encoding. is - An InputStreamenc - The name of a supported character encoding

      • If the named encoding is not supported
      Throws:
      UnsupportedEncodingException

  • Method Details

    • close

      public void close() throws IOException
      Close the stream. Closing a previously closed stream has no effect.
      Specified by:
      close in interface java.lang.AutoCloseable
      Specified by:
      close in class Reader
      Throws:
      IOException

    • mark

      public void mark(int readAheadLimit) throws IOException
      Mark the present position in the stream.
      Overrides:
      mark in class Reader
      Throws:
      IOException

    • markSupported

      public boolean markSupported()
      Tell whether this stream supports the mark() operation.
      Overrides:
      markSupported in class Reader

    • read

      public int read() throws IOException
      Read a single character.
      Overrides:
      read in class Reader
      Throws:
      IOException

    • read

      public int read(char[] cbuf, int off, int len) throws IOException
      Read characters into a portion of an array.
      Specified by:
      read in class Reader
      Throws:
      IOException

    • ready

      public boolean ready() throws IOException
      Tell whether this stream is ready to be read.
      Overrides:
      ready in class Reader
      Throws:
      IOException

    • reset

      public void reset() throws IOException
      Reset the stream.
      Overrides:
      reset in class Reader
      Throws:
      IOException

    • skip

      public long skip(long n) throws IOException
      Skip characters.
      Overrides:
      skip in class Reader
      Throws:
      IOException