CSE-1020: Introduction to Computer Science I
York University
Lab Test #2: Kangaroo
2:30pm Wednesday 11 November 2009
(Lab-04)
  Welcome to the Lab-test Environment

During the test, you will not be able to access your regular home directory, access, receive, or send e-mail, print, or access the Internet.

The lab tests are closed-book and no aids are allowed.

At the end of your test session, this machine will be converted back to a standard, unrestricted Prism Lab machine. At this time, any files written by you during the test, except those that have been submitted, will not be recoverable. Make sure you submit your code before the end of the test. (Instructions to submit your code are below). If you do not submit your work on time, you will receive a grade of zero. (There are no exceptions.)

Instructions

You have the lab period, 80 minutes, to complete this lab test. The computers will automatically shutdown at the end of the time (e.g., 3:50pm), warning you several minutes in advance. No additional time will be provided, so you must submit your work prior to this; otherwise, there will be no way to recover it (it will be lost), and you will receive a grade of zero (no exceptions).

You are encouraged to submit often during the test. Note that newer submissions overwrite older ones.

Your program will be marked for good style, as well as for running correctly (producing correct output in the correct format).

Submitting Your Work

When you submit a file, you should include at the top of the file your name (surname, given name) and your Prism lab login. These should be placed in a comment so that the file will compile. Note that files which do not compile will receive a large penalty when marked, no matter how small the error that prevented compiling.

Submit the class Kangaroo.java before the time deadline. Here is the command to submit your work:

% submit 1020 labtest2W2.30 Kangaroo.java

Further details regarding the submit command can also be obtained by typing man submit.

Once again, you are encouraged to submit regularly. Newer submissions simply overwrite older ones.

Unlike eCheck assignments, there is partial credit possible. If you are able to finish all aspects of the program (for example, say, input validation was requested but you did not do this), you should still submit it.

Useful APIs

Here are the common APIs that you may access:

 
  The Task

Write a Java application called Kangaroo.java.

A kangaroo word is a word that contains letters of a second word, in order, and that the two words have the same meaning. The following are kangaroo words.

banish contains  ban
chocolate contains  cocoa
enjoyment   contains  joy
satisfied contains  sated

Your program should repeatedly prompt a user for two words. For each word pair, it determines whether the first word contains the letters of the second word in the correct order. That is, it determines whether the first word is a kangaroo word (with respect to the second word). If the first word is a kangaroo word, it should then print the kangaroo word with the letters of the second word in upper case. If not, it should just state it is not a kangaroo word. (See output samples below.)

You may assume that the user input is in all lower case. You do not have to do input validation. Your output should look exactly like that indicated in the sample runs below.

Hint: Use a StringBuffer to construct the output of the kangaroo word. Use the Character class to convert a lower case character to uppercase.

Sample Runs

Here is one sample run of a correctly written program. Note that the text in red is text that the user types. The text in black is what the program types. The '%' represents the prompt from the command-line window (shell).

% java Kangaroo
Enter two words, or Ctrl-d to quit: chocolate cocoa
ChOCOlAte is a kangaroo word

Enter two words, or Ctrl-d to quit: satisfied sated
SATisfiED is a kangaroo word

Enter two words, or Ctrl-d to quit: joviality joy
JOvialitY is a kangaroo word

Enter two words, or Ctrl-d to quit: dog cat  
not a kangaroo word

Enter two words, or Ctrl-d to quit: computer pc
not a kangaroo word

Enter two words, or Ctrl-d to quit: 
%

Coding

You should use good programming practises as described in the textbook, and your code should conform to the style guide in the textbook. You should comment at least minimally, as by the guidelines.

You should not use any features of Java not covered in the first six chapters of the text. There will be some deduction if you do.