JAVA char input

Question

My code is not taking input into a char variable after it takes its first value.

import java.io.*;
import java.lang.Character;
public class Test
{
    public static void main(String args[])throws IOException
    {
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));                                                                                          
        char s;
        for(int i=0;i<3;i++)
        {
            System.out.print("->");
            s=(char)br.read();
            System.out.print(s);
        }
    }
}

I am getting this output

->a
->>

And i wont this

->a
a
->b
b
->c
c

Answer 1

According to Java Docs: Here

read() function reads a single character at a time.

Input Provided : a followed by Enter.

br.read() reads following characters in iteration: a -> \\r -> \\n in the first three iterations. If you loop over for more than 3, it would again prompt for user input.

You can approach your problem by following two ways:

1. Using read() function : In this case, input needs to be like 'abcd' instead of 'a', then 'b', then 'c' then 'd'.

    public static void main(String args[])throws IOException
           {
               BufferedReader br=new BufferedReader(new InputStreamReader(System.in));                                                                                          
               char s;
               for(int i=0;i<3;i++)
               {
                   System.out.print("->");
                   s=(char)br.read();
                   System.out.print(s);
               }
           }

2. Using readLine() function: Input would be the way mentioned in question.

public static void main(String args[])throws IOException
            {
                BufferedReader br=new BufferedReader(new InputStreamReader(System.in));                                                                                          
                String s;
                for(int i=0;i<3;i++)
                {
                    System.out.print("->");
                    s=br.readLine();
                    System.out.print(s);
                }
            }