CxeJ48s4

1import java.util.Scanner;
2import java.util.ArrayList;
3
4public class DataVisualization {
5   
6    public static String promptAndPrint(Scanner scnr, String prompt){
7        String input = "";
8        System.out.println(prompt);
9        input = scnr.nextLine();
10        System.out.println("You entered: " + input);
11        System.out.println("");
12        return input;
13    }
14
15    public static void addDataToArray(ArrayList<String> dataString, ArrayList<Integer> dataInteger, String userInput, Scanner in){
16        String input = userInput.substring(0, userInput.indexOf(','));
17        int inputInt = in.nextInt();
18        dataString.add(input);
19        dataInteger.add(inputInt);
20        System.out.println("Data string: " + input);
21        System.out.println("Data integer: " + inputInt);
22    }
23
24    public static void outputToTable(String userTitle, String columnHeader1, String columnHeader2, ArrayList<String> dataString, ArrayList<Integer> dataInteger){
25        System.out.println("");
26        System.out.printf("%33s\n", userTitle);
27        System.out.printf("%-20s|%23s\n", columnHeader1, columnHeader2);
28            for (int i = 0; i < 44; i++)  {
29                System.out.print("-");
30            }
31            System.out.println("");
32
33            for (int i = 0; i < dataString.size(); i++)  {
34                System.out.printf("%-20s|%23d\n", dataString.get(i), dataInteger.get(i));
35            }
36        System.out.println("");
37    }
38
39    public static void outputHistogram(ArrayList<String> dataString, ArrayList<Integer> dataInteger){
40        for (int i = 0; i < dataString.size(); i++)  {
41            System.out.printf("%20s ", dataString.get(i));
42            for (int j = 0; j < dataInteger.get(i); j++)   {
43                System.out.print("*");
44            }
45            System.out.println("");
46        }
47    }
48    public static void main(String[] args) {
49        Scanner scnr = new Scanner(System.in);
50        
51        String userTitle = "";                                                  // Data Title
52        String columnHeader1 = "";                                              // Column 1 Title
53        String columnHeader2 = "";                                              // Column 2 Title
54        ArrayList<String> dataString = new ArrayList<String>();                 // Column 1 Data
55        ArrayList<Integer> dataInteger = new ArrayList<Integer>();              // Column 2 Values
56        String userInput = "";                                                  // User input for data
57        boolean quit = false;                                                   // Flag to indicate finish input (-1 input)
58        
59        userTitle = promptAndPrint(scnr, "Enter a title for the data:");
60        columnHeader1 = promptAndPrint(scnr, "Enter the column 1 header:");
61        columnHeader2 = promptAndPrint(scnr, "Enter the column 2 header:");    
62    
63    // TODO: Turn this into a method?
64    while (!quit) {
65        
66        System.out.println("\nEnter a data point (-1 to stop input):");
67        userInput = scnr.nextLine();
68        if (userInput.equals("-1")){
69            quit = true;
70        }
71         
72        // if more than 1 comma exists in userInput
73        else if (userInput.indexOf(',') != -1 && userInput.indexOf(',', userInput.indexOf(',')+1) != -1){   // checks if there is a comma after the first comma
74            System.out.println("Error: Too many commas in input.");
75        }
76
77        // if there is only 1 comma
78        else if (userInput.indexOf(',') != -1)   {
79            // create new Scanner object that takes userInput from comma onwards (i.e. integer)
80            Scanner in = new Scanner(userInput.substring(userInput.indexOf(',') + 1));
81            
82            // if there is integer then add all information into ArrayList
83            if (in.hasNextInt())   {
84                addDataToArray(dataString, dataInteger, userInput, in);
85            }
86
87            else  {
88                System.out.println("Error: Comma not followed by an integer.");
89            }              
90        }
91
92        else if (userInput.indexOf(',') == -1) {
93            System.out.println("Error: No comma in string.");
94        }
95    }
96 
97        // Output information into formatted table
98        outputToTable(userTitle, columnHeader1, columnHeader2, dataString, dataInteger);
99        
100        // Output information as a formatted histogram
101        outputHistogram(dataString, dataInteger);
102
103    }
104}
105