With character terminal applications, there are always two ends in the communication, which must agree on how to interpret the control characters. Usually both sides are capable of using a variety of codings described in termcap/terminfo database. On the Unix server-side you can define the coding by setting the TERM environmental variable, or by using … Read more
Idiomatic Example: The following is how to properly use the java.util.Scanner class to interactively read user input from System.in correctly( sometimes referred to as stdin, especially in C, C++ and other languages as well as in Unix and Linux). It idiomatically demonstrates the most common things that are requested to be done. package com.stackoverflow.scanner; import … Read more
You can use System.in to read from the standard input. It works just like entering it from a keyboard. The OS handles going from file to standard input. import java.util.Scanner; class MyProg { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println(“Printing the file passed in:”); while(sc.hasNextLine()) System.out.println(sc.nextLine()); } }
Pure Java You can redirect System.in with a single line of code: System.setIn(new FileInputStream(filename)); See System.setIn(). Eclipse config In Eclipse 4.5 or later, the launch configuration dialog can set System.in to read from a file. See the announcement here.