Class AssignX

java.lang.Object

Shell

AssignX

Direct Known Subclasses:

MyAssignX

public abstract class AssignX
extends Shell

This class provides code for testing the classes MyXXX.java that you will complete. Do NOT change anything or add anything to this class

Field Summary

Fields inherited from class Shell

debug

Constructor Summary

Constructors

Constructor and Description
AssignX()

Method Summary

Modifier and Type	Method and Description
abstract boolean	divides(int numerator, int denominator) Determine if the denominator evenly divides the numerator.
abstract int[]	findMultiples(int[] list, int denominator) Find all elements of the list that are evenly divisible by the denominator
abstract int[]	merge(int[] list1, int[] list2) Merge two sorted lists to produce a sorted list containing all the values from both lists.
void	processOneCommand(java.lang.String cmd, java.lang.String params) Process one command for this assignment.
void	showHelp() Display a list of commands useful for testing the classes you will complete for this assignment.
abstract void	trio(java.lang.String[] list) Given a list of names, print out all combinations of the names taken three at a time.
abstract void	wordCount(java.lang.String fileName) Count the number of words and the number of lines in a file.

Methods inherited from class Shell

debug, filter, format, getIntArray, getRandom, getStrArray, getStringOrNull, main, ooMain, processCmdsFromFile, processCommands, processCommands, rest, strArrayToIntArray

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AssignX

public AssignX()

Method Detail

divides

public abstract boolean divides(int numerator,
                                int denominator)

Determine if the denominator evenly divides the numerator. If a = b/c (in integers) and c divides b evenly, then ac = b.

Parameters:

numerator - - any integer

denominator - any integer

Returns:

true if denominator evenly divides numerator. Otherwise, return false.

findMultiples

public abstract int[] findMultiples(int[] list,
                                    int denominator)

Find all elements of the list that are evenly divisible by the denominator

Parameters:

list - - an array of integer values

denominator - any integer

Returns:

a list (possibly empty) containing only those elements that are evenly divisible by the denominator. The values in the returned list must be in the same order as the values occur in the parameter list.

wordCount

public abstract void wordCount(java.lang.String fileName)

Count the number of words and the number of lines in a file. If the file does not exist, print 0 for both values. The output should be the number of lines followed by a blank followed by the number of words followed by a newline. For this assignment, a word is any group of characters. Thus 3.14. is a word. To check you answer, you may use the wc command from a terminal shell.

Parameters:

fileName - - the name of the file to process.

merge

public abstract int[] merge(int[] list1,
                            int[] list2)

Merge two sorted lists to produce a sorted list containing all the values from both lists. Duplicates are allowed. You must handle all possible values for the lists, including empty/null lists. You many not use any java sort methods. If either of the lists is null, return the other list as the answer.

Parameters:

list1 - - an array of sorted values

list2 - - another array of values

Returns:

a sorted list containing the elements from both lists.

trio

public abstract void trio(java.lang.String[] list)

Given a list of names, print out all combinations of the names taken three at a time. If the list has too few elements, don't print anything. Names must occur in the same order that they appear in the list. So, if the list contains the names Kennedy, Johnson, Nixon, Ford, you program prints:

 [Kennedy, Johnson, Nixon]
 [Kennedy, Johnson, Ford]
 [Kennedy, Nixon, Ford]
 [Johnson, Nixon, Ford]
 

Put the values in an array and then use the Arrays.toString() method to print the results, one per line.

Parameters:

list - - a list of name.

showHelp

public void showHelp()

Display a list of commands useful for testing the classes you will complete for this assignment. The commands are:

• div Determine if one value evenly divides another
• merge merge two ordered lists
• multiples find values divisible by another value
• trio find combinations of three names
• wc find the number of lines and words in a file.

Overrides:

showHelp in class Shell

processOneCommand

public void processOneCommand(java.lang.String cmd,
                              java.lang.String params)
                       throws java.io.FileNotFoundException,
                              java.util.NoSuchElementException

Process one command for this assignment.

Overrides:

processOneCommand in class Shell

Parameters:

cmd - - the command to process

params - - a string containing the parameter(s) (if any)

Throws:

java.io.FileNotFoundException

java.util.NoSuchElementException