The class is the superclass of all classes representing an output stream of bytes. An output stream accepts output bytes and sends them to some sink.Applications that need to define a subclass of OutputStream must always provide at least a method that writes one byte of output.

Class declaration

Following is the declaration for class −

public abstract class OutputStream
   extends Object
      implements Closeable, Flushable

Class constructors

Sr.No. Constructor & Description


Single Constructor.

Class methods

Sr.No. Method & Description
1 void close()

This method closes this output stream and releases any system resources associated with this stream.

2 void flush()

This method flushes this output stream and forces any buffered output bytes to be written out.

3 void write(byte[] b)

This method writes b.length bytes from the specified byte array to this output stream.

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

This method writes len bytes from the specified byte array starting at offset off to this output stream.

5 abstract void write(int b)

This method writes the specified byte to this output stream.

Methods inherited

This class inherits methods from the following classes −