Question

I have a file with the following input:

ADD 1 2
SUB 2 1
MUL 2 3
DIV 4 2
QUIT

with this part of the code:

BufferedReader in = null;
String input = "";
in = new BufferedReader(fin);
while ((input = in.readLine()) != null)
{
    String line = in.readLine();    
    System.out.println(line); // for me to see the output
    out.println(line); // thats for my server
    out.flush(); // for the server
}

but it only shows:

MUL 2 3
DIV 4 2 
null

Answer 1

Try this:

BufferedReader in = null;
String input = "";
in = new BufferedReader(fin);
while ((input = in.readLine()) != null)
{
    System.out.println(input); // for me to see the output
    out.println(input); // thats for my server
    out.flush(); // for the server
}

You were reading input from file twice, once in the while statement and once after the while statement.