I'm not sure how to put together the below solution. I can't figure out how to put everything into netbeans. Currently I'm just throwing each section into seperate classes under the same package as well as the csv file it's supposed to be reading from. I know this is wrong, and am having trouble figuring out how to do it. Currently it tells me there is no main class.

TestCrime.java -------------------------- /** File: TestCrime.java * Purpose: Display menu to user and output data from various classes */

import java.util.Scanner;

public class TestCrime { public static void main(String[] args){ try { //fields Long startTime, endTime, elapsedTime; String userInput;

/** Create and instantiate USCrimeClass object * pass command line argument to CsvToArray.getArray static method to convert csv to 2d array * pass the returned array to the constructor as a parameter */ USCrimeClass usCrimes = new USCrimeClass(CsvToArray.getArray(args[0]));

//set start time startTime = System.nanoTime();

//setup scanner Scanner stdin = new Scanner(System.in);

System.out.println(" ********** Welcome to the US Crime Statistical Application **************************");

//print menu // loop while userInput is not equal to "Q" or "q" while (true) { //Call Menu class static method getMenu and print System.out.println(Menu.getMenu()); //take user input userInput = stdin.nextLine();

//take action based on user choice switch (userInput.toLowerCase()) { case "1": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getPercentChanged("Population","1994","1995")); System.out.println(usCrimes.getPercentChanged("Population","1995","1996")); System.out.println(usCrimes.getPercentChanged("Population","1996","1997")); System.out.println(usCrimes.getPercentChanged("Population","1997","1998")); System.out.println(usCrimes.getPercentChanged("Population","1998","1999")); System.out.println(usCrimes.getPercentChanged("Population","1999","2000")); System.out.println(usCrimes.getPercentChanged("Population","2000","2001")); System.out.println(usCrimes.getPercentChanged("Population","2001","2002")); System.out.println(usCrimes.getPercentChanged("Population","2002","2003")); System.out.println(usCrimes.getPercentChanged("Population","2003","2004")); System.out.println(usCrimes.getPercentChanged("Population","2004","2005")); System.out.println(usCrimes.getPercentChanged("Population","2005","2006")); System.out.println(usCrimes.getPercentChanged("Population","2006","2007")); System.out.println(usCrimes.getPercentChanged("Population","2007","2008")); System.out.println(usCrimes.getPercentChanged("Population","2008","2009")); System.out.println(usCrimes.getPercentChanged("Population","2009","2010")); System.out.println(usCrimes.getPercentChanged("Population","2010","2011")); System.out.println(usCrimes.getPercentChanged("Population","2011","2012")); System.out.println(usCrimes.getPercentChanged("Population","2012","2013")); break; case "2": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getMinMax("Murder and nonnegligent manslaughter rate","highest")); break; case "3": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getMinMax("Murder and nonnegligent manslaughter rate","lowest")); break; case "4": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getMinMax("Robbery rate","highest")); break; case "5": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getMinMax("Robbery rate","lowest")); break; case "6": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getPercentChanged("Motor Vehicle Theft","1998","2012")); break; case "7": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getValueWhen("Population","Violent crime rate","highest")); break; case "8": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getValueWhen("Violent crime rate", "Burglary rate","highest")); break; case "9": System.out.println(" you have chosen: " + userInput + " "); System.out.println(usCrimes.getAllData()); break; case "q"://end time and calculate duration of run in seconds System.out.println(" Thank you for trying the US Crimes Statistics Program"); endTime = System.nanoTime(); //LocalTime.now().toSecondOfDay(); elapsedTime = (endTime - startTime) / 1000000000; System.out.println(" Elapsed time in seconds was: " + elapsedTime); //exit program without error System.exit(0); break; default: System.out.println(" Invalid selection. Please choose again."); break; } //end switch

} //end while loop

} catch (ArrayIndexOutOfBoundsException oob) { System.out.println(" There was an issue. Please make sure you specify a file."); System.exit(1); } catch (Exception e) { System.out.println(" There is something wrong and I don't know what it could be."); System.exit(1); }

} //end main method } //end TestCrime class --------------------------------------------------------------- USCrimeClass.java --------------------------------- /** File: USCrimeClass.java * Purpose: Read in and store data. */ public class USCrimeClass {

// ---------- fields ---------- final int COLUMN = 20; final int ROW = 21; String crimeData2D[][] = new String[ROW][COLUMN];

// ---------- Constructors ---------- public USCrimeClass(String crime2darray[][]) { this.crimeData2D = crime2darray; }

// --------- getMinMax Method --------- protected String getMinMax(String heading, String highestOrLowest) { // ---------- Fields ---------- int rowIndex = 0; int columnIndex; final int YEARCOLUMNINDEX = 0; //returnFields String returnYear; String returnValue; String results = "AHHHHH";

//set columnIndex to matching heading columnIndex = ArrayUtils.getHeadingIndex(this.crimeData2D, heading);

switch (highestOrLowest){ case "highest": //based on columnIndex set rowIndex to the highest value rowIndex = ArrayUtils.getMaxValueRowIndex(this.crimeData2D, columnIndex); break; case "lowest": //based on columnIndex set rowIndex to the lowest value rowIndex = ArrayUtils.getMinValueRowIndex(this.crimeData2D, columnIndex); break; default: System.out.println("you are dumb, high or low?"); break; }

//based on rowIndex get the year for that row returnYear = crimeData2D[rowIndex][YEARCOLUMNINDEX]; returnValue = crimeData2D[rowIndex][columnIndex];

results = "The " + highestOrLowest + " " + heading + " was at " + returnValue + " in " + returnYear + "."; return results; } //end getMinMax method

// --------- percentageChange method ---------- public String getPercentChanged(String heading, String yearOne, String yearTwo) { // ---------- Fields ---------- int firstRowIndex; int columnIndex; int secondRowIndex; String returnValue;

//search for the first year's row firstRowIndex = ArrayUtils.getYearIndex(this.crimeData2D, yearOne); //search for the second year's row secondRowIndex = ArrayUtils.getYearIndex(this.crimeData2D, yearTwo); //search for heading value and set column columnIndex = ArrayUtils.getHeadingIndex(this.crimeData2D, heading);

//Calculations double firstStat = Double.parseDouble(crimeData2D[firstRowIndex][columnIndex]); double secondStat = Double.parseDouble(crimeData2D[secondRowIndex][columnIndex]); double difference = ((secondStat - firstStat) / firstStat) * 100;

returnValue ="The percentage change for " + heading + " from " + yearOne + " to " + yearTwo + " was " + difference + "%."; return returnValue; } //end perChange method

// --------- getValueWhen method ---------- public String getValueWhen(String firstHeading, String secondHeading, String highestOrLowest) { // ---------- Fields ---------- int rowIndex = 0; int firstColumnIndex; int secondColumnIndex; final int YEARCOLUMNINDEX = 0; //returnFields String returnYear; String returnValue; String results = "AHHHH";

//search for first heading value and set firstColumnIndex firstColumnIndex = ArrayUtils.getHeadingIndex(this.crimeData2D, firstHeading);

//search for first heading value and set secondColumnIndex secondColumnIndex = ArrayUtils.getHeadingIndex(this.crimeData2D, secondHeading);

//determine min/max value in secondColumnIndex and return rowIndex switch (highestOrLowest){ case "highest": //based on columnIndex set rowIndex to the highest value rowIndex = ArrayUtils.getMaxValueRowIndex(this.crimeData2D, secondColumnIndex); break; case "lowest": //based on columnIndex set rowIndex to the lowest value rowIndex = ArrayUtils.getMinValueRowIndex(this.crimeData2D, secondColumnIndex); break; default: System.out.println("you are dumb, high or low?"); break; }

//sets up return values returnValue = crimeData2D[rowIndex][firstColumnIndex]; returnYear = crimeData2D[rowIndex][YEARCOLUMNINDEX]; results = "The " + firstHeading + " was at " + returnValue + " when " + secondHeading + " was at it's " + highestOrLowest + " in " + returnYear + ".";

return results; } //end getValueWhen method

//Additional Methods go here

//This section prints the 2d array -- for verification public StringBuilder getAllData() { //This section prints the 2d array -- for verification //sets the row StringBuilder allData = new StringBuilder("********** US Crime Statistical Data ********** "); for (int i = 0; i

return allData; } //end getAllData method

} //end USCrimeClass --------------------------------------------------------------- Menu.java --------------------------------- /** File: Menu.java * Purpose: return menu as a string when called */ public class Menu { public static String getMenu() { //instantiate and read menu into string variable String menu = " " + "Enter the number of the question you want answered. Enter Q to quit the program : " + "1. What were the percentages in population growth for each consecutive year from 1994 2013? " + "2. What year was the Murder rate the highest? " + "3. What year was the Murder rate the lowest? " + "4. What year was the Robbery rate the highest? " + "5. What year was the Robbery rate the lowest? " + "6. What was the total percentage change in Motor Vehicle Theft between 1998 and 2012? " + "7. What was the Population when the Violent crime rate was the highest? " + "8. What was Violent crime rate when the Burglary rate was the highest? " + "9. View a table of all statistical data. " + "Q. Quit the program " + "Enter your selection:" + "";

return menu; } // end getMenu method } // end Menu class --------------------------------------------------------------- ArrayUtils.java ---------------------------------

/** File: Menu.java * Purpose: provides various utilities to find array indexes based on some search criteria */ public class ArrayUtils {

// ----------- fields ---------- private static final int YEARCOLUMNINDEX = 0; private static final int HEADINGROWINDEX = 0;

//getHeadingIndex - column public static int getHeadingIndex(String[][] array, String heading){ int columnIndex = 0;

for (int i = 1; i

//getYearIndex - row public static int getYearIndex(String[][] array, String year){ int rowIndex = 0;

for (int i = 1; i

//getMaxValueRowIndex public static int getMaxValueRowIndex(String[][] array, int columnIndex){ double maxValue = 0; double value; int rowIndex = 0;

for (int i = 1; i

//getMinValueRowIndex public static int getMinValueRowIndex(String[][] array, int columnIndex){ double minValue = 1000000000; double value; int rowIndex = 0;

for (int i = 1; i value) { minValue = value; rowIndex = i; } } return rowIndex; } //end getMinValueRowIndex method

} //end ArraysUtils class --------------------------------------------------------------- CsvToArray.java ---------------------------------

/**File: USCrimeClass.java * Purpose: take csv filename passed and read csv into a 2d array and return array */ import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException;

public class CsvToArray { public static String[][] getArray (String filename){ //fields BufferedReader br = null; final int COLUMN = 20; final int ROW = 21; String array[][] = new String[ROW][COLUMN];

//Read the CSV file //Setup try/catch/finally blocks for exception handling try { //setup input reader String currentLine; br = new BufferedReader(new FileReader(filename));

//while loop to read input, provide output and count int count = 0; while ((currentLine = br.readLine()) != null) { for (int i = count; i

return array; } }

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