How to Append Data to a FileOutputStream Without Overwriting Existing Content?

Writing Data to FileOutputStream Without Data Loss

When working with FileOutputStream, writing to a file with the default settings overwrites existing data. To preserve previous content while writing, consider the following approach:

Using the Constructor with Append Option

The FileOutputStream class offers a constructor that accepts both a File and a boolean flag, append. Setting this flag to true ensures that written data is appended to the end of the file instead of replacing the old data.

<code class="java">FileOutputStream fos = new FileOutputStream(file, true);</code>

When you subsequently write to the file using this stream, the data will be added to the end of the file without affecting the existing content. As a result, using the append option allows for seamless appending of data to a file without the risk of losing it.

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