Example Program

Programs can be written to use any type of file as input, but this chapter only discusses input with text files. Here is a program that reads input from the keyboard:

import java.util.Scanner;

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

    System.out.println("Enter your input:");
    line = scan.nextLine();

    System.out.println( "You typed: " + line );
   }
}

Here is how the program ordinarily works:

C:\users\default\JavaLessons>java Echo

Enter your input:
This came from the keyboard
You typed: This came from the keyboard

D:\users\default\JavaLessons>