Module java.base
Package java.io

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 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.