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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:

JDK1.1

See Also:
InputStream, ObjectOutputStream, ObjectInputStream

Method Summary

Methods
Modifier and Type	Method and 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.

ObjectOutput (Java Platform SE 7 ) Home of API Java Contents Haut

Methods inherited from interface java.io.DataOutput writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

- Method Detail
  - 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.
  - 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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Interface ObjectOutput

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