Open Source For Geeks: IO in Java (Using Scanner and BufferedReader)
Console flush() method in Java with Examples - GeeksforGeeks
JAVA] Scanner 대신 Buffer를 사용해보자!
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Java BufferedOutputStream flush() method example
Solved] module is File Input and Output copy.dat has nothing in it ... | Course Hero
Java Scanner: everything you need to know about this Java class
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Java.io.BufferedWriter class methods in Java - GeeksforGeeks
Scanner class in Java - learn how to take input from keyboard in Java #8 - YouTube