flush in Java instructs buffer data to be forced to be written to a storage device or network to ensure persistence, prevent loss, and improve performance. It is performed by calling OutputStreamWriter.flush() and is recommended when writing important data, requiring immediate access to data, using large buffers, or when high performance is required.
flush in Java
meaning of flush
in In Java, flush refers to forcing the data in the buffer to be written to the underlying storage device or network. It ensures that data does not remain in the buffer but is written to the target immediately.
Function
flush is very useful in the following situations:
Usage
To perform a flush operation, you can use the following code:
<code class="java">OutputStreamWriter outputStreamWriter = new OutputStreamWriter(new FileOutputStream("output.txt")); outputStreamWriter.flush();</code>
This code will force to be written outputStreamWriter
writes all data in the buffer to file output.txt
.
When to use
Here are some situations where flush is recommended:
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