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Resources

• Oracle's Basic I/O Tutorial

Input/OutputStreams are concerned with bytes

• InputStream <<Closeable>> read() close()
  • ByteArrayInputStream (byte[] buffer)
  • FileInputStream (File) (String filename)
  • FilterInputStream (InputStream)
    • BufferedInputStream
    • DataInputStream<<DataInput>> readBoolean() readUTF()
  • ObjectInputStream <<ObjectInput>> readObject()


• OutputStream <<Closeable, Flushable>> write() flush() close()
  • ByteArrayOutputStream (byte[] buffer)
  • FileOutputStream (File) (String filename)
  • FilterOutputStream (OutputStream)
    • BufferedOutputStream
    • DataOutputStream<<DataOutput>> writeBoolean() writeUTF()
  • ObjectOutputStream <<ObjectOutput>> writeObject()

Readers/Writers are concerned with characters

• Reader <<Closeable, Readable>> read() close()
  • BufferedReader (Reader) readline()
  • InputStreamReader (InputStream)
    • FileReader (File) (String filename)


• Writer <<Closeable, Flushable, Appendable>> write() append() close()
  • BufferedWriter (Writer)
  • OutputStreamWriter (OutputStream)
    • FileWriter (File) (String filename)
  • PrintWriter (ObjectStream) (File) (String filename) (Writer) print() printf()

Key Exception classes

• java.lang.Throwable
  • java.lang.Error
    • java.io.IOError
  • java.lang.Exception
    • java.io.IOException
      • java.io.EOFException
      • java.io.FileNotFoundException
      • java.io.InterruptedIOException
      • java.io.ObjectStreamException

Typical usage

• new BufferedReader(new FileReader("input.txt")).readLine();
• new PrintWriter(new FileWriter("output.txt")).println(string);