Scanner: Capturando tecla Enter

Programação Java
#1

Quero simular o comando cat do linux.

Daí preciso saber se o cara clicou na tecla “Enter” na linha de comando.

Obrigado.

Abraços.

#2

O programa cat não é interativo, não vejo por quê você tenha que capturar tecla alguma do usuário; a menos que na realidade você esteja desenvolvendo seja um prompt/interpretador de comandos.

#3

Pois é. O meu precisa ser interativo.

#4

Ninguém?

#5

Reading a string the user enters at a command-line prompt

The basic technique of reading a String provided by a user at a command-line is fairly simple, but more lengthy than you’d expect. It involves the use of the System.in object, along with the InputStreamReader and BufferedReader classes. The code in Listing 1 shows how you can prompt the user to enter a String value, such as their name, and then read that value.

import java.io.*;

public class ReadString {

public static void main (String[] args) {

  //  prompt the user to enter their name
  System.out.print("Enter your name: ");

  //  open up standard input
  BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

  String userName = null;

  //  read the username from the command-line; need to use try/catch with the
  //  readLine() method
  try {
     userName = br.readLine();
  } catch (IOException ioe) {
     System.out.println("IO error trying to read your name!");
     System.exit(1);
  }

  System.out.println("Thanks for the name, " + userName);

}

} // end of ReadString class

#6