Question

Introduction

In this lab, we will look at various aspects of methods in Java programming such as passing arguments to a method, use of local variables, and returning a value from a method.

Exercise-1: RainFall Statistisc(50 pts)

Write a program that asks user the total rainfall for the last six months of two consecutive years and do the following:

1. the total rainfall per year
2. the average monthly rainfall (for two years)
3. the month with the most rain (per year)

You need to break your code into the following methods:

• run: It asks the user to enter the year and rainfall values for each month (last six months) and reads the input as a double from the keyboard. It calls isValid method for validity check of the year. If isValid method returns true, then program will ask for the rainfall values from July to December for that year. Each time user will enter the rainfall values; isValid method will be called to check for the validity of the input. Once, the user enters all the required input, and then the method will show the output in the format as shown above.

• isValid: It returns true in the following scenario:

1. year should greater than 1990.
2. The monthly rainfall cannot be negative

Otherwise, it returns false.

Exercise 2: (30 pts)

Add a code segment to the code that you complète in Exercise1 to do the following :

1. Display the year that received the most rain.

Answer 1

Here is the answer for your question in Java Programming Language.

Kindly upvote if you find the answer helpful.

NOTE : I have given code for both Excercise 1 and Excercise 2. Please comment if you have any doubts.

###############################################################

CODE :

import java.text.DecimalFormat; import java.util.Scanner; public class RainFallStatistics { static DecimalFormat f = new DecimalFormat("#.##"); public static void main(String[] args){ System.out.println("==========================================="); System.out.println("RAINFALL STATISTICS"); System.out.println("==========================================="); run(); } public static void run(){ //Required variables String[] months = { "JULY", "AUGUST", "SEPTEMBER", "OCTOBER", "NOVEMBER", "DECEMBER" }; double[][] yearRainFalls = new double[2][7];    double[] totalRainFalls = {0,0}; double[] highestRainFall = {0,0}; double[] averageMonthlyRainFalls = new double[6];    Scanner s = new Scanner(System.in); //Read information from user for(int i = 0;i<2;i++){ //Read year as input from user System.out.print("Enter the #" + (i+1) + " year: "); yearRainFalls[i][0] = s.nextInt(); //validate it and ask repeatedly if invalid data enetered while(!isValid(yearRainFalls[i][0],"year")){ System.out.println("Year should be greater than 1990....Try again"); System.out.print("Enter the first year: "); yearRainFalls[i][0] = s.nextInt(); } for(int j=1;j<7;j++){ //Read rainfall of each month of the year System.out.print("Enter rainfall of " + months[j-1] + " : "); yearRainFalls[i][j] = s.nextDouble();    //validate it and ask repeatedly if invalid data enetered while(!isValid(yearRainFalls[i][j],"rainfall")){ System.out.println("Rainfall cannot be negative....Try again"); System.out.print("Enter rainfall of " + months[j-1] + " : "); yearRainFalls[i][j] = s.nextDouble(); } //Sum up rainfalls of current year totalRainFalls[i] += yearRainFalls[i][j]; //Find highest rainfall if(yearRainFalls[i][j] > highestRainFall[i]){ highestRainFall[i] = yearRainFalls[i][j]; } } System.out.println("============================================="); } //Calculate averge rainfall for(int i=1;i<7;i++){ averageMonthlyRainFalls[i-1] = (yearRainFalls[0][i] + yearRainFalls[1][i]) / 2; } //Display output System.out.println("=============================="); System.out.println("Rain Fall Statistics"); System.out.println("=============================="); System.out.println("Total rainfall of year " + (int)(yearRainFalls[0][0]) + " is " + totalRainFalls[0]); System.out.println("Total rainfall of year " + (int)yearRainFalls[1][0] + " is " + totalRainFalls[1]);    System.out.println("Average Monthly Rainfall: "); for(int i = 0;i<6;i++){ System.out.println("For the month of " + months[i] + " : " + f.format(averageMonthlyRainFalls[i])); } System.out.println("=============="); System.out.println("Highest rainfall of the year " + (int)yearRainFalls[0][0] + " is " + highestRainFall[0]); System.out.println("Highest rainfall of the year " + (int)yearRainFalls[1][0] + " is " + highestRainFall[1]);      //EXERCISE - 2 CODE SEGMENT System.out.println("Year that received most rain " + (int)((totalRainFalls[0] > totalRainFalls[1])?yearRainFalls[0][0]:yearRainFalls[1][0])); } //isValid method that takes value and type of input public static boolean isValid(double value,String type){ //if it is year checks whether year is > 1990 if(type.equalsIgnoreCase("year")){ if(value > 1990) return true;    }else if(type.equalsIgnoreCase("rainfall")){ //If it is rainfall checks if it is non-negative if(value > 0) return true; } return false; } }

######################################################################

SCREENSHOTS :

Please see the screensots of the code below for the indentations of the code.

################################################################

OUTPUT :

Input

Output

Any doubts regarding this can be explained with pleasure :)