Your Name _____________Adams - KEY_________________________

Lab 5 : Experimenting with Input/Output

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

Ï «Ï ----jGRASP exec: javac -g -source 1.5 C:\Documents and Settings\liz\Desktop\Lab5\Rooter.java
ÏϧÏ
ϼ§ÏRooter.java:13: cannot find symbol
ÏϧÏsymbol : class PrintWriter
ÏϧÏlocation: class Rooter
ÏÏ§Ï PrintWriter screen;
ÏÏ§Ï ^

2.4. What line did you need to add?

import java.io.PrintWriter; OR import java.io.*;

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

ÏRooter.java:14: cannot find symbol
ÏϧÏsymbol : class Scanner
ÏϧÏlocation: class Rooter
ÏÏ§Ï Scanner keyboard;
ÏÏ§Ï ^

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

import java.util.Scanner; or import java.util.*;

2.8. System.out is an object of which Java class?

NOTava.Lang - it's a package but SYSTEM

3.4. Why was no output generated?

because PrintWriter writes to output stream (buffer) but doesn't include a newline so buffer is not dumped to the screen. http://java.sun.com/j2se/1.5.0/docs/api/

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

screen.flush();

3.6. 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>-C or <ctrl>-Z

4.4. What output was generated?

Today's Date: 8 September 2008

Birthday: Pink

4.7. What happened and why?

The system cannot find the file specified.

because there was no file in the directory named Anniversaries.txt

4.9 What changes did you need to make?

private static File dates;

4.11 What did you need to add?

dates = new File(args[0]);

4.13. What changes did you need to make?

try
{
dateScanner = new Scanner (dates);

// dates is a new file with name from args[0]
} // end try
catch (FileNotFoundException fnfe)
{
System.out.println( fnfe.getMessage());
} // end catch

4.15. What output was generated?

Today's Date: 8 September 2008

Birthday: Pink

5.2. What changes did you need to make? See different versions of Remember in Lecture notes

private static File dates2;

dates2 = new File(args[1]);

try
{
dateScanner = new Scanner (dates2);

// dates is a new file with name from args[1]
} // end try
catch (FileNotFoundException fnfe)
{
System.out.println( fnfe.getMessage());_
} // end catch
processDates(today); // processDates is a programmer defined method

5.4. What output was generated?

Today's Date: 8 September 2008

Birthday: Pink

Read Chapter 10 of War and Peace