All Packages  Class Hierarchy  This Package  Previous  Next  Index

Interface java.io.ObjectInput

public interface ObjectInput
extends DataInput
ObjectInput extends the DataInput interface to include the writing of objects. DataInput includes methods for the input of primitive types, ObjectInput extends that interface to include objects, arrays, and Strings.

See Also:
InputStream, ObjectOutputStream, ObjectInputStream

Method Index

o available()
Returns the number of bytes that can be read without blocking.
o close()
Closes the input stream.
o read()
Reads a byte of data.
o read(byte[])
Reads into an array of bytes.
o read(byte[], int, int)
Reads into an array of bytes.
o readObject()
Read and return an object.
o skip(long)
Skips n bytes of input.

Methods

o readObject 
 public abstract Object readObject() throws ClassNotFoundException, IOException
Read and return an object. The class that implements this interface defines where the object is "read" from.

Throws: ClassNotFoundException
If the class of a serialized object cannot be found.
Throws: IOException
If any of the usual Input/Output related exceptions occur.
o read 
 public abstract int read() throws IOException
Reads a byte of data. This method will block if no input is available.

Returns:
the byte read, or -1 if the end of the stream is reached.
Throws: IOException
If an I/O error has occurred.
o read 
 public abstract int read(byte b[]) throws IOException
Reads into an array of bytes. This method will block until some input is available.

Parameters:
b - the buffer into which the data is read
Returns:
the actual number of bytes read, -1 is returned when the end of the stream is reached.
Throws: IOException
If an I/O error has occurred.
o read 
 public abstract int read(byte b[],
                          int off,
                          int len) throws IOException
Reads into an array of bytes. This method will block until some input is available.

Parameters:
b - the buffer into which the data is read
off - the start offset of the data
len - the maximum number of bytes read
Returns:
the actual number of bytes read, -1 is returned when the end of the stream is reached.
Throws: IOException
If an I/O error has occurred.
o skip 
 public abstract long skip(long n) throws IOException
Skips n bytes of input.

Parameters:
n - the number of bytes to be skipped
Returns:
the actual number of bytes skipped.
Throws: IOException
If an I/O error has occurred.
o available 
 public abstract int available() throws IOException
Returns the number of bytes that can be read without blocking.

Returns:
the number of available bytes.
o close 
 public abstract void close() throws IOException
Closes the input stream. Must be called to release any resources associated with the stream.

Throws: IOException
If an I/O error has occurred. 
All Packages  Class Hierarchy  This Package  Previous  Next  Index
Submit a bug or feature