Difference between revisions of "CISC181 S2015 Lab9"

Latest revision as of 10:11, 18 January 2017

Preliminaries

• Make a new project with n = 9 (following these instructions)
• Name your main class "Lab9" (when creating a new module in the instructions above, in the Java class name field)

Part 1

This section revisits the WordStats section of Lab 6. You may re-use any code from it that you find useful. You may also use this template for WordStats_Timed.java

Make a public class WordStats_Timed which has a constructor that takes the full path name of ONE file to read (no console interaction). Using the same delimiter as Lab 6, write three methods in WordStats_Timed to determine the alphabetically last word in the file:

• readQuiet(): Keep a "current" last word, and compare each new scanned word to it. Update the last word if the new word is "later". Don't print anything.
• readVerbose(): Same thing but for each word read, print it and the current last word to the console with System.out.println()
• readSort(): Add each scanned word to an initially empty ArrayList of Strings, then call Collections.sort() on it and extract the last word. Do not print anything.

Each read* should save the answer in a field which can be read with the public accessor method String getLastWord(). It should also measure the running time of the function with nanoTime() and set a field which can be read with the public accessor method double getElapsedSeconds().

In your main(), read the file "greatexp.txt" 10 times for each method (this may require calling the WordStats_Timed constructor repeatedly), average together the elapsed time for each, and separately report how long each took in seconds with at least 3 digits of precision.

Part 2

Using the Java Date and/or SimpleDateFormat and/or Calendar classes as necessary (see lecture slides), write a method in your Lab9 class called void printMonthCalendar(String dateString) which does the following:

• Takes input as a date in "month/day/year" format (all numbers). For example, this lab was released on "4/20/2015"
• Prints a text-formatted "calendar" for that month which looks roughly like this:

300px

Ignore the font size, etc. The main thing is this:

• First line: Full month name to left, year to right. They don't have to be perfectly aligned with the table below
• Second line: First letter of day of week
• Rest of lines: Dates in month, in correct locations (i.e., lined up with day of week letter). Do not print a number if it belongs to the previous or next month

Test your function by calling it from main() with at least 3 different dates.

Here are some sample inputs and expected outputs:

printMonthCalendar("7/4/1776");

July           1776
S  M  T  W  T  F  S
   1  2  3  4  5  6  
7  8  9  10 11 12 13 
14 15 16 17 18 19 20 
21 22 23 24 25 26 27 
28 29 30 31 

printMonthCalendar("12/31/1899");

December       1899
S  M  T  W  T  F  S
               1  2  
3  4  5  6  7  8  9  
10 11 12 13 14 15 16 
17 18 19 20 21 22 23 
24 25 26 27 28 29 30 
31 

printMonthCalendar("4/24/2015");

April          2015
S  M  T  W  T  F  S
         1  2  3  4  
5  6  7  8  9  10 11 
12 13 14 15 16 17 18 
19 20 21 22 23 24 25 
26 27 28 29 30

Submission

Submit your Lab9.java and WordStats_Timed.java.