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One of the easiest way for user input is to use a Scanner object. Scanner scan = new Scanner(System.in); //Reads from System.in System.out.println("Enter a number"); int x = scan.nextInt(); //Scans the input of Integer type scan.close(); //once finished close scanner https://code.sololearn.com/czaZjwJ5fBz1/?ref=app https://www.sololearn.com/learn/Java/2220/
If you have just started learning java, I'll recommend you to take a look at how to take input using command line arguments. They are easy to understand. You'll understand scanner and buffered reader classes better once you will complete input/output streams in java.