Interface ObjectOutput

All Superinterfaces:: AutoCloseable, DataOutput

All Known Implementing Classes:: ObjectOutputStream

public interface ObjectOutput extends DataOutput, AutoCloseable

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.

Since:

1.1

See Also:

Method Summary

Modifier and Type	Method	Description
`void`	`close()`	Closes the stream.
`void`	`flush()`	Flushes the stream.
`void`	`write(byte[] b)`	Writes an array of bytes.
`void`	`write(byte[] b, int off, int len)`	Writes a sub array of bytes.
`void`	`write(int b)`	Writes a byte.
`void`	`writeObject(Object obj)`	Write an object to the underlying storage or stream.

Methods declared in interface DataOutput

writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Modifier and Type	Method	Description
`void`	`writeBoolean(boolean v)`	Writes a `boolean` value to this output stream.
`void`	`writeByte(int v)`	Writes to the output stream the eight low-order bits of the argument `v`.
`void`	`writeBytes(String s)`	Writes a string to the output stream.
`void`	`writeChar(int v)`	Writes a `char` value, which is comprised of two bytes, to the output stream.
`void`	`writeChars(String s)`	Writes every character in the string `s`, to the output stream, in order, two bytes per character.
`void`	`writeDouble(double v)`	Writes a `double` value, which is comprised of eight bytes, to the output stream.
`void`	`writeFloat(float v)`	Writes a `float` value, which is comprised of four bytes, to the output stream.
`void`	`writeInt(int v)`	Writes an `int` value, which is comprised of four bytes, to the output stream.
`void`	`writeLong(long v)`	Writes a `long` value, which is comprised of eight bytes, to the output stream.
`void`	`writeShort(int v)`	Writes two bytes to the output stream to represent the value of the argument.
`void`	`writeUTF(String s)`	Writes two bytes of length information to the output stream, followed by the modified UTF-8 representation of every character in the string `s`.

Method Details

writeObject

void writeObject(Object obj) throws IOException

Write an object to the underlying storage or stream. The class that implements this interface defines how the object is written.

Parameters:: obj - the object to be written
Throws:: IOException - Any of the usual Input/Output related exceptions.

write

void write(int b) throws IOException

Writes a byte. This method will block until the byte is actually written.

Specified by:: write in interface DataOutput
Parameters:: b - the byte
Throws:: IOException - If an I/O error has occurred.

write

void write(byte[] b) throws IOException

Writes an array of bytes. This method will block until the bytes are actually written.

Specified by:: write in interface DataOutput
Parameters:: b - the data to be written
Throws:: IOException - If an I/O error has occurred.

write

void write(byte[] b, int off, int len) throws IOException

Writes a sub array of bytes.

Specified by:: write in interface DataOutput
Parameters:: b - the data to be written; off - the start offset in the data; len - the number of bytes that are written
Throws:: IOException - If an I/O error has occurred.; IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than b.length - off

flush

void flush() throws IOException

Flushes the stream. This will write any buffered output bytes.

Throws:: IOException - If an I/O error has occurred.

close

void close() throws IOException

Closes the stream. This method must be called to release any resources associated with the stream.

Specified by:: close in interface AutoCloseable
Throws:: IOException - If an I/O error has occurred.

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