Input and Output

10. Details (continued)

Answer:
The standard input stream — the keyboard.
(Scanner objects can be connected to other data streams.)

`Details (continued)`


import java.util.Scanner;

public class Echo
{
  public static void main (String[] args)
  {
    String inData;
    Scanner scan = new Scanner( System.in );

    System.out.println("Enter the data:");
    inData = scan.nextLine();

    System.out.println("You entered:" + inData );
  }
}

System.out.println("Enter the data:");

This calls the method println to print the characters "Enter the data:" to the monitor.

inData = scan.nextLine();

This uses the nextLine() method of the object referred to by scan to read a line of characters from the keyboard. A String object (referred to by inData) is created to contain the characters.

System.out.println("You entered:" + inData );

This first creates a String by concatenating "You entered:" to characters from inData, then calls println() to print that String to the monitor.

Question 10:

When the program runs, can the user edit the input string (using backspace and other keyboard keys) before hitting "enter"?

(Try this, if you have a running program.)