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package java.io;

ObjectOutput extends the DataOutput interface to include writing of objects. DataOutput includes methods for output of primitive types, ObjectOutput extends that interface to include objects, arrays, and Strings.
See Also:
Since: 1.1
/** * ObjectOutput extends the DataOutput interface to include writing of objects. * DataOutput includes methods for output of primitive types, ObjectOutput * extends that interface to include objects, arrays, and Strings. * * @see java.io.InputStream * @see java.io.ObjectOutputStream * @see java.io.ObjectInputStream * @since 1.1 */
public interface ObjectOutput extends DataOutput, AutoCloseable {
Write an object to the underlying storage or stream. The class that implements this interface defines how the object is written.
Params:
  • obj – the object to be written
Throws:
  • IOException – Any of the usual Input/Output related exceptions.
/** * Write an object to the underlying storage or stream. The * class that implements this interface defines how the object is * written. * * @param obj the object to be written * @throws IOException Any of the usual Input/Output related exceptions. */
public void writeObject(Object obj) throws IOException;
Writes a byte. This method will block until the byte is actually written.
Params:
  • b – the byte
Throws:
/** * Writes a byte. This method will block until the byte is actually * written. * @param b the byte * @throws IOException If an I/O error has occurred. */
public void write(int b) throws IOException;
Writes an array of bytes. This method will block until the bytes are actually written.
Params:
  • b – the data to be written
Throws:
/** * Writes an array of bytes. This method will block until the bytes * are actually written. * @param b the data to be written * @throws IOException If an I/O error has occurred. */
public void write(byte b[]) throws IOException;
Writes a sub array of bytes.
Params:
  • b – the data to be written
  • off – the start offset in the data
  • len – the number of bytes that are written
Throws:
/** * Writes a sub array of bytes. * @param b the data to be written * @param off the start offset in the data * @param len the number of bytes that are written * @throws IOException If an I/O error has occurred. */
public void write(byte b[], int off, int len) throws IOException;
Flushes the stream. This will write any buffered output bytes.
Throws:
  • IOException – If an I/O error has occurred.
/** * Flushes the stream. This will write any buffered * output bytes. * @throws IOException If an I/O error has occurred. */
public void flush() throws IOException;
Closes the stream. This method must be called to release any resources associated with the stream.
Throws:
  • IOException – If an I/O error has occurred.
/** * Closes the stream. This method must be called * to release any resources associated with the * stream. * @throws IOException If an I/O error has occurred. */
public void close() throws IOException; }