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Re: The greeting code in Java

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On Jun 19, 8:36 pm, rossum <rossu...@coldmail.com> wrote:
> On Sun, 19 Jun 2011 06:05:53 -0700 (PDT), Saeed Amrollahi
>
>
>
> <amrollahi.sa...@gmail.com> wrote:
> >Dear all
> >Hi
>
> >I'm a C++ programmer and I started to learn Java. After famous "Hello
> >World"
> >program, the obvious code is "Say hello to specific people". Program
> >asked
> >user's name, then print a greeting message. The C++ code is:
> >#include <iostream>
> >#include <string>
> >Using std::cin;     using std::cout;        using std::string;
> >int main()
> >{
> >  // ask for the person's name
> >  std::cout << "Please enter your first name: ";
> >  std::string name; // define name
> >  std::cin >> name;   // read into name
> >  // write a greeting
> >  std::cout << "Hello, " << name << "!" << std::endl;
>
> >  return 0;
> >}
> >I tried to write the simplest code in Java and I ended up with the
> >following:
>
> >package Greeting;
> >import java.io.*;
>
> >public class Main {
>
> >    public static void main(String[] args) throws IOException {
> >        System.out.print("Please enter your first name: ");
> >        String name = new String();
> >        Reader r = new InputStreamReader(System.in);
> >        for (char ch; (ch = (char)(r.read())) != '\n'; name += ch) {}
> >        System.out.println("Hello, " + name);
> >    }
> >}
>
> >What are the problems of my code and how can I write
> >a better one. Please throw some light.
>
> >TIA,
> >  -- Saeed Amrollahi
>
> Stream readers are more often used for binary input.  For text input
> people tend to use the java.util.Scanner class.
>
>   public static void main(String[] args) {
>     System.out.print("Please enter your first name: ");
>     Scanner sc = new Scanner(System.in);
>     String name = sc.nextLine();
>     System.out.println("Hello, " + name);
>   }
>
> rossum

What is the Scanner? Why we use nextLine? What's the relation of
such concepts with a simple greeting program.
Why the code for writing "Hello, world" is in chapter 1, page 1
of The Java Programming Language, but the code of greeting may be in
Chapter 20!
  -- Saeed
for

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The greeting code in Java Saeed Amrollahi <amrollahi.saeed@gmail.com> - 2011-06-19 06:05 -0700
  Re: The greeting code in Java rossum <rossum48@coldmail.com> - 2011-06-19 17:36 +0100
    Re: The greeting code in Java Saeed Amrollahi <amrollahi.saeed@gmail.com> - 2011-06-19 12:15 -0700
      Re: The greeting code in Java Martin Gregorie <martin@address-in-sig.invalid> - 2011-06-19 19:46 +0000
        Re: The greeting code in Java Saeed Amrollahi <amrollahi.saeed@gmail.com> - 2011-06-19 22:34 -0700
          Re: The greeting code in Java Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2011-06-23 11:43 +0300
        Re: The greeting code in Java Martin Gregorie <martin@address-in-sig.invalid> - 2011-06-20 10:13 +0000
          Re: The greeting code in Java Michael Wojcik <mwojcik@newsguy.com> - 2011-06-22 09:29 -0400
      Re: The greeting code in Java Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-06-19 16:00 -0400
      Re: The greeting code in Java Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-06-19 16:05 -0400
        Re: The greeting code in Java Saeed Amrollahi <amrollahi.saeed@gmail.com> - 2011-06-19 22:40 -0700
      Re: The greeting code in Java rossum <rossum48@coldmail.com> - 2011-06-19 22:28 +0100
  Re: The greeting code in Java Roedy Green <see_website@mindprod.com.invalid> - 2011-06-19 21:14 -0700
  Re: The greeting code in Java Roedy Green <see_website@mindprod.com.invalid> - 2011-06-19 21:23 -0700
  Re: The greeting code in Java blmblm@myrealbox.com <blmblm.myrealbox@gmail.com> - 2011-06-20 19:20 +0000
    Re: The greeting code in Java Ney André de Mello Zunino <zunino@softplan.com.br> - 2011-06-22 15:55 -0300

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