Section 11 : The java.io Package

Miscellaneous

The hierarchy of I/O package is like this:

InputStream

• ByteArrayInputStream

• FileInputStream

• PipedInputStream

• FilterInputStream

  • BufferedInputStream

  • PushbackInputStream

  • DataInputStream

• ObjectInputStream

OutputStream

• ByteArrayOutputStream

• FileOutputStream

• PipedOutputStream

• FilterOutputStream

  • BufferedOutputStream

  • PrintStream

  • DataOutputStream

• ObjectOutputStream

Reader

• BufferedReader

• CharArrayReader

• FilterReader

  • PushbackReader

  • FileReader

• InputStreamReader

• PipedReader

• StringReader

Writer

• BufferedWriter

• CharArrayWriter

• FilterWriter

• OutputStreamWriter

  • FileWriter

• PipedWriter

• PrintWriter

• StringWriter

•  

Some methods of InputStream:

• int available()

• void close ()

• void mark( int readLimit)

• boolean markSupported ()

• abstract int read ()

• int read (byte [] bytes)

• int read (byte [] bytes, int offset, int length)

• void reset ()

• long skip (long n)

Some methods of OutputStream:

• void close ()

• void flush ()

• void write (byte [] b)

• void write (byte [] b, int offset, int length)

• abstract void write (int b)

Some methods of Reader:

• void close ()

• void mark (int readLimit)

• boolean markSupported ()

• int read ()

• int read (char [] chars)

• abstract int read (char [] chars, int offset, int length)

• boolean ready ()

• void reset ()

• long skip (long n)

Some methods of Writer:

• abstract void close ()

• abstract void flush ()

• void write (char [] chars)

• abstract void write (char [] chars, int offset, int length)

• void write (int c)

• void write (String s)

• void write (String s, int offset, int length)

Methods that do not throw IOException:

InputStream:

• mark ()

• markSupported ()

File:

• All Constructors

• getCanonicalFile ()

• getCanonicalPath ()

• createNewFile ()

• toURL ()

• createTempFile ()

OutputStreamWriter:

• getEncoding ()

FileInputStream and FileOutputStream:

• All constructors throw FileNotFoundException.

RandomAccessFile:

• All constructors throw FileNotFoundException.

Reader and Writer:

• markSupported ()

PrintStream and PrintWriter:

• never throw IOException.

FileReader:

All constructors throw FileNotFoundException except fdObj version.

FileWriter:

One constructor (fdObj version)

BufferedReader and BufferedWriter:

• All the constructors.

• markSupported()

BufferedInputStream and BufferedOutputStream:

• All constructors.

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