Andrew Kelley

Lab: Experimenting with Input/Output



3.3. What was the first error generated by the compiler?

Rooter.java:18: cannot find symbol
symbol  : class PrintWriter
location: class Rooter
       PrintWriter     screen;       
       ^


3.4. What line did you need to add?

import java.io.*;

3.6. What was the first error generated by the compiler this time?

Rooter.java:20: cannot find symbol
symbol  : class Scanner
location: class Rooter
       Scanner         keyboard;
       ^


3.7.  Fix this error.  What line did you need to add?

import java.util.Scanner;

4.4. Why was no output generated?

There was no output since the string "Enter a number" was first stored in the buffer and never printed to the screen.

4.5. Fix this mistake.  What line did you add?

screen.flush();

4.6. What do you need to type in the terminal window (as a response to
the prompt) in order to make this application terminate normally?

Ctrl + z exists the program.

5.4. What output was generated?
          
Today's Date: 22 January 2007
        Birthday: Sir Francis Bacon
        Birthday: George Foreman

5.6. What happened and why?

 The program ended because no such file could be found.

5.8 What changes did you need to make?

File     dates;

5.10. What changes did you need to make?

dates    = new File(args[0]);

5.12. What changes did you need to make?

try
{
  dateScanner = new Scanner(dates);
}
catch(FileNotFoundException fnfe)
{
  System.out.println("File that was pass not found.");
}

          
5.14. What output was generated?

        Today's Date: 22 January 2007
        Birthday: Sir Francis Bacon
        Birthday: George Foreman


6.2. What changes did you need to make?

for(int i = 0; i < args.length; i ++)
{
 dates    = new File(args[i]);
 dateScanner = new Scanner(dates);
 processDates(today);
}

          
6.4. What output was generated?

Today's Date: 22 January 2007
        Birthday: Sir Francis Bacon
        Birthday: George Foreman
        Programming Assignment 1 Due
        Review the Java tutorial on Exceptions