Java FileChannel.write() is a method in the Java FileChannel class that writes data from a ByteBuffer to a file. It is used for efficient file output, particularly when dealing with large files or performing memory-mapped I/O. Introduced in Java 2007 with Java 7, write() is essential for applications requiring high-performance file writing, such as in multimedia processing, large data processing, or logging systems.

https://docs.oracle.com/javase/8/docs/api/java/nio/channels/FileChannel.html