How to Append Data to a File Using FileOutputStream in Java?

Appending Data to Files Using FileOutputStream

When using FileOutputStream methods, it's essential to understand that subsequent writes overwrite existing data. However, there exists a solution to append data without obliterating previous content.

Solution

To append data, utilize the FileOutputStream constructor that takes a File and a boolean parameter:

<code class="java">FileOutputStream(File file, boolean append)</code>

Set the boolean parameter to true. This action ensures that the data you write is appended to the end of the file instead of replacing the existing content.

Example

<code class="java">File file = new File("myfile.txt");
FileOutputStream fos = new FileOutputStream(file, true);
fos.write("Appending new data to the file.".getBytes());
fos.close();</code>

By utilizing this approach, the new data will be appended to the end of myfile.txt, preserving the original content.

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