Assignment 2


Technical Description

public int getRain(int month, int day)

returns the random amount of rain generated for the specified day by creating upper/lower bounds and estimating between them

  • subtracts 1 from month so the index is 0-based
  • checks if the month is in bounds (0 <= month < 12)
  • If checks pass, gets the max and min rainfal for the given month
  • gets the max rainfal for next month by adding 1 to the index. Takes the mod 12 of the new month so that December (11) cycles round to January (0)
  • calculates the difference between the max of this and next month
  • calculates how far through the month a given day is based on the number of days in a month, returns a double as a percent (kind of, X100
  • sets the max RainfallDifference variable to account for not being through the entire month.
  • sets the maxRainToday variable as an upper boundary for the value by adding the max difference to the max rainfall
  • multiplies maxRainToday by a random float between 0 and 1 (makes it smaller) and assigns it to the int variable rain
  • if this value is smaller than the minRainThisMonth, return that value, else return the random scaled value


This constructor generages rainfall data for every day of every month and assigns it to the rainfall array.

  • sets the rainfall matrix array to have 12 rows (one for each month)
  • starts a for loop that iterates over the range 0-11 as the variable month
  • for every month/row in the array, the method initialises a column for every day in that month respectively.
  • the method then starts another for loop that iterates over every day in the month and adds estimated rainfall data to that column.

private int[] prepareData()

method name matches another method!

  • Initialises a new int array of length 12
  • cycles through each month, calculates the average rainfall across all days in that month, scales it (default is 1), and then adds it to the array.
  • returns an int array of the average scaled rainfall for every month

private void verticalGraph(int[] array)

display a vertical graph representing rainfall

  • takes in an array of integers & initialises a star string called stars
  • sets the ArrayMax (not pascal case) integer to the maximum value in the array
  • starts a for loop, with int i starting as ArrayMax, and iterating down once each loop until 0 (each ROW in the veritcal graph)
  • resets stars to "|"
  • starts another for loop that interates through every index in the given array as integer j
  • if the value at this index in the array is greater than i, append a star to that column in the stars string, else append a space
  • prints the row to stdout
  • at the end of nested for loopps, initialises Strings dottedLine and dateLine to "|"
  • starts a new for loop interating through the indices of the array as int i (this is to display the bottom row)
  • appends "---" to dottedLine
  • formats the index (i) + 1 to double digit form
  • prints dottedLine and then dateLine, followed by a newline character


Aditional Features

Vertical and Horizontal graphs do not have second axis values to indicate amount of rainfall

Printed graphs display a number of stars representing (scaled) rainfall every month, however there are no labels on the y/x axis respectively that indicate how much rainfall this actually is and what a star represents.