This coding problem (code is in java):

The persuasive power of words can be seen in a variety of places such as entertainment, news, social media, and even reviews and comments. This activity focuses on the sentimental value of individual words, and you will start by reading a few online reviews of your choice.

In this activity youll be calling the sentimentVal method. Find this method in the Review class, take note of the answers to the following 3 questions and provide these answers when you get to the next activity:

1. Write down the method signature.

2. Does this method require a parameter? If so, what type of parameter is required? What happens if you pass a different type of parameter instead?

3. Does the method return a value? If so, what is the return type?

4. In the ReviewTester class, write code that tests the sentimentVal method by calling it with several different String parameters and printing out the return value.

   Test out sentimentVal on the words "happily", "cold", and "terribly".

   Any words not in the list will have a return value of zero. Make sure to keep calling the method until you have at least three strings that have a return value other than zero. Record the method calls, including provided strings and return values.

Experiment using the sentimentVal method in this exercise, and answer the questions in the next.

What there already is for the code:

cleanSentiment.csv

1960s,0.09 1970s,-0.07 1980s,-0.15 1990s,0.05 aaron,-0.32 abandoned,-0.09 abby,0.64 ability,-0.03 able,-0.04 abnormal,-0.34 aboard,-0.15 above,0.2 abrupt,-0.83 abruptly,-1.11 abs,0.58 absence,-0.8 absent,0.08 absolute,-1.51

(all of this a-z)

Review.java

import java.util.Scanner; import java.io.File; import java.util.HashMap; import java.util.ArrayList; import java.util.Random; import java.io.*;

/** * Class that contains helper methods for the Review Lab **/ public class Review { private static HashMap sentiment = new HashMap(); private static ArrayList posAdjectives = new ArrayList(); private static ArrayList negAdjectives = new ArrayList(); private static final String SPACE = " "; static{ try { Scanner input = new Scanner(new File("cleanSentiment.csv")); while(input.hasNextLine()){ String[] temp = input.nextLine().split(","); sentiment.put(temp[0],Double.parseDouble(temp[1])); //System.out.println("added "+ temp[0]+", "+temp[1]); } input.close(); } catch(Exception e){ System.out.println("Error reading or parsing cleanSentiment.csv"); } //read in the positive adjectives in postiveAdjectives.txt try { Scanner input = new Scanner(new File("positiveAdjectives.txt")); while(input.hasNextLine()){ String temp = input.nextLine().trim(); System.out.println(temp); posAdjectives.add(temp); } input.close(); } catch(Exception e){ System.out.println("Error reading or parsing postitiveAdjectives.txt " + e); } //read in the negative adjectives in negativeAdjectives.txt try { Scanner input = new Scanner(new File("negativeAdjectives.txt")); while(input.hasNextLine()){ negAdjectives.add(input.nextLine().trim()); } input.close(); } catch(Exception e){ System.out.println("Error reading or parsing negativeAdjectives.txt"); } } /** * returns a string containing all of the text in fileName (including punctuation), * with words separated by a single space */ public static String textToString( String fileName ) { String temp = ""; try { Scanner input = new Scanner(new File(fileName)); //add 'words' in the file to the string, separated by a single space while(input.hasNext()){ temp = temp + input.next() + " "; } input.close(); } catch(Exception e){ System.out.println("Unable to locate " + fileName); } //make sure to remove any additional space that may have been added at the end of the string. return temp.trim(); } /** * @returns the sentiment value of word as a number between -1 (very negative) to 1 (very positive sentiment) */ public static double sentimentVal( String word ) { try { return sentiment.get(word.toLowerCase()); } catch(Exception e) { return 0; } } /** * Returns the ending punctuation of a string, or the empty string if there is none */ public static String getPunctuation( String word ) { String punc = ""; for(int i=word.length()-1; i >= 0; i--){ if(!Character.isLetterOrDigit(word.charAt(i))){ punc = punc + word.charAt(i); } else { return punc; } } return punc; } /** * Randomly picks a positive adjective from the positiveAdjectives.txt file and returns it. */ public static String randomPositiveAdj() { int index = (int)(Math.random() * posAdjectives.size()); return posAdjectives.get(index); } /** * Randomly picks a negative adjective from the negativeAdjectives.txt file and returns it. */ public static String randomNegativeAdj() { int index = (int)(Math.random() * negAdjectives.size()); return negAdjectives.get(index); } /** * Randomly picks a positive or negative adjective and returns it. */ public static String randomAdjective() { boolean positive = Math.random() < .5; if(positive){ return randomPositiveAdj(); } else { return randomNegativeAdj(); } } }

positiveAdjectives.txt

(Nothing)

negativeAdjectives.txt

(Nothing)

ReviewTester.java

public class ReviewTester { public static void main(String[] args) { //Test the sentimentVal method here! } }