Скачать или смотреть Understanding System.in and System.out in Java

In Java, System.in and System.out are standard input and output streams provided by the System class.

System.in is an InputStream used to receive input from the user, typically through the keyboard. It reads raw byte data and is commonly wrapped with classes like Scanner or BufferedReader to read text input easily.

System.out is a PrintStream used to display output to the console. It provides convenient methods like print(), println(), and printf() for sending text and data to the screen.
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Java input, Java output, user input, console output, read data, display data, keyboard input, print to screen, basic Java, standard input, standard output, input stream, output stream, Java programming, Java basics



These streams help Java programs interact with users by accepting input and displaying output directly in the console.