W3cubDocs

/OpenJDK 21

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.

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.

© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/io/ObjectOutput.html