Class TimesTable

java.lang.Object

TimesTable

public class TimesTable
extends java.lang.Object

A class that produces a multiplication table.

The provided code is incomplete. Modify it so that it works properly and passes the tests in TimesTableTest.java.

See Also:

MP2 Documentation

Constructor Summary

Constructors

Constructor	Description
TimesTable()

Method Summary

Modifier and Type	Method	Description
static int[][]	createTimesTable(int first, int second)	Given two positive numbers first and second, produce a multiplication table for numbers first through second, inclusive.
static void	main(java.lang.String[] unused)	Solicits two integers from the user and print the resulting multiplication table.

Methods inherited from class java.lang.Object

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

Constructor Detail

TimesTable

public TimesTable()

Method Detail

createTimesTable

public static int[][] createTimesTable(int first,
                                       int second)

Given two positive numbers first and second, produce a multiplication table for numbers first through second, inclusive.

For example, if create(4, 6) produces the following 2D array: [[0, 4, 5, 6] [4, 16, 20, 24] [5, 20, 25, 30] [6, 24, 30, 36]]

Note that:

• The output array should always start with zero, such that output[0][0] == 0.
• The output array is symmetric, such that output[n][m] == output[m][n].

You should reject any values of first and second that are not positive. You should also reject the case where second is not greater than first. In these cases create return null.

Parameters:

first - the number to start the multiplication table at

second - the number to end the multiplication table at

Returns:

the two-dimensional multiplication table, or null if the arguments are invalid

main

public static void main(java.lang.String[] unused)

Solicits two integers from the user and print the resulting multiplication table.

You are free to review this function, but should not modify it. Note that this function is not tested by the test suite, as it is purely to aid your own interactive testing.

Parameters:

unused - unused input arguments