JAVA NIO vs IO

https://www.javatpoint.com/java-nio-vs-input-output

https://howtodoinjava.com/java/io/difference-between-standard-io-and-nio/

http://tutorials.jenkov.com/java-nio/non-blocking-server.html

https://dzone.com/articles/java-io-and-nio

http://tutorials.jenkov.com/java-nio/buffers.html

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