The I/O Classes and Interfaces - java.io

The I/O Classes and Interfaces

The I/O classes defined by java.io are listed here:

BufferedInputStream

BufferedOutputStream

BufferedReader

BufferedWriter

ByteArrayInputStream

ByteArrayOutputStream

CharArrayReader

CharArrayWriter

Console 

DataInputStream

DataOutputStream

File        

FileDescriptor

FileInputStream

FileOutputStream

FilePermission

FileReader

FileWriter

FilterInputStream

FilterOutputStream

FilterReader

FilterWriter

InputStream

InputStreamReader

LineNumberReader

ObjectInputStream

ObjectInputStream.GetField

ObjectOutputStream

ObjectOutputStream.PutField

ObjectStreamClass

ObjectStreamField

OutputStream

OutputStreamWriter

PipedInputStream

PipedOutputStream

PipedReader

PipedWriter

PrintStream

PrintWriter

PushbackInputStream

PushbackReader

RandomAccessFile

Reader

SequenceInputStream

SerializablePermission

StreamTokenizer

StringReader

StringWriter

Writer

The java.io package also contains two deprecated classes that are not shown in the preceding table: LineNumberInputStream and StringBufferInputStream. These classes should not be used for new code.

The following interfaces are defined by java.io:

Closeable

DataInput

DataOutput

Externalizable

FileFilter

FilenameFilter

Flushable

ObjectInput

ObjectInputValidation

ObjectOutput

ObjectStreamConstants

Serializable

As you can see, there are many classes and interfaces in the java.io package. These include byte and character streams, and object serialization (the storage and retrieval of objects). This chapter examines several commonly used I/O components. We begin our discussion with one of the most distinctive I/O classes: File.