Re: java newbie - basic io question

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Tue, 03 Jul 2007 21:30:40 -0400

Message-ID:

<468af83c$0$90268$14726298@news.sunsite.dk>

Thomas wrote:

Hello I 'm new to java and I want just to ask about the shortest possible
way to read user input from console. I found this :

  char tmp;
  Integer liczba = new Integer (0);
  StringBuffer buffer;
  buffer=new StringBuffer();

while((tmp = (char)System.in.read())!='\n')
   buffer=buffer.append(tmp);
  liczba=Integer.parseInt(buffer.toString().trim());

Almost any Java version:

import java.io.*;

public class S14 {
     public static void main(String[] args) throws Exception {
         BufferedReader br = new BufferedReader(new
InputStreamReader(System.in));
         System.out.print("Enter integer: ");
         int iv = Integer.parseInt(br.readLine());
         System.out.println(iv);
         System.out.print("Enter decimal: ");
         double xv = Double.parseDouble(br.readLine());
         System.out.println(xv);
         System.out.print("Enter string: ");
         String sv = br.readLine();
         System.out.println(sv);
     }
}

Java 1.5 and newer:

import java.io.*;
import java.util.*;

public class S15 {
     public static void main(String[] args) throws Exception {
         Scanner scn = new Scanner(System.in);
         System.out.print("Enter integer: ");
         int iv = scn.nextInt();
         System.out.println(iv);
         System.out.print("Enter decimal: ");
         double xv = scn.nextDouble();
         System.out.println(xv);
         System.out.print("Enter string: ");
         String sv = scn.next();
         System.out.println(sv);
     }
}

Arne