61- Programming with java || What is OutputStream in java?

Published: 31 July 2025
on channel: TechLearn(تک لرن)

In Java, OutputStream is an abstract class that represents a stream of bytes flowing out of a program. It's the foundation for writing data to various destinations, such as files, network connections, or in-memory buffers.
Key Points:
Abstract Class:
OutputStream is an abstract class, meaning you cannot create instances of it directly. Instead, you use its concrete subclasses like FileOutputStream (for writing to files), ByteArrayOutputStream (for writing to an in-memory byte array), and others.
Writing Bytes:
The core functionality of OutputStream is provided by the write() methods, which allow you to write bytes of data to the output stream.
Flushing:
To ensure that all buffered data is written to the destination, you can use the flush() method.
Closing:
It's important to close the stream using the close() method when you're done writing to it. This releases any system resources associated with the stream.

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