Zx2fTJAB

1import java.util.Scanner;
2import java.util.ArrayList;
3
4public class DataVisualizer {
5   public static void main(String[] args) {
6      Scanner scnr = new Scanner(System.in);
7      
8      String userTitle;
9      String columnHeader1;
10      String columnHeader2;
11      ArrayList<String> authorName = new ArrayList<String>();
12      ArrayList<Integer> numNovels = new ArrayList<Integer>();
13      int i = 0;
14      String userInput = "";
15      
16      
17      System.out.println("Enter a title for the data:");
18      userTitle = scnr.nextLine();
19      System.out.println("You entered: " + userTitle);
20      System.out.println("");
21      System.out.println("Enter the column 1 header:");
22      
23      columnHeader1 = scnr.nextLine();
24      System.out.println("You entered: " + columnHeader1);
25      System.out.println("");
26      System.out.println("Enter the column 2 header:");
27      columnHeader2 = scnr.nextLine();
28      System.out.println("You entered: " + columnHeader2);
29      
30    
31      userInput = "";
32      while (!userInput.equals("-1")) {
33         userInput = scnr.nextLine();
34         System.out.println("\nEnter a data point (-1 to stop input):");
35         
36         if (userInput.equals("-1")){
37            break;
38         }
39         
40         // if more than 1 comma exists in userInput
41         if (userInput.indexOf(',') != -1 && userInput.indexOf(',', userInput.indexOf(',')+1) != -1){
42            System.out.println("Error: Too many commas in input.");
43         }
44         else if (userInput.indexOf(',') != -1)   {
45            // create new Scanner object that takes userInput from comma onwards
46            Scanner in = new Scanner(userInput.substring(userInput.indexOf(',')+1));
47            // if there is integer then add all information into ArrayList
48            if (in.hasNextInt())   {
49               authorName.add(i,userInput.substring(0, userInput.indexOf(',')));
50               numNovels.add(i, in.nextInt());
51               System.out.println("Data string: " + authorName.get(i));
52               System.out.println("Data integer: " + numNovels.get(i));
53               i++;
54            }
55            else  {
56               System.out.println("Error: Comma not followed by an integer.");
57            }              
58         }
59         else if (userInput.indexOf(',') == -1) {
60            System.out.println("Error: No comma in string.");
61         }
62      }
63      
64      // Output information into formatted table
65     System.out.println("");
66     System.out.printf("%33s\n", userTitle);
67
68      System.out.printf("%-20s|%23s\n", columnHeader1, columnHeader2);
69      for (int j = 0; j < 44; j++)  {
70         System.out.print("-");
71      }
72      System.out.println("");
73
74      for (int j = 0; j < authorName.size(); j++)  {
75         System.out.printf("%-20s|%23d\n", authorName.get(j), numNovels.get(j));
76      }
77      System.out.println("");
78      
79      // Output information as a formatted histogram
80      for (int j = 0; j < authorName.size(); j++)  {
81         System.out.printf("%20s ", authorName.get(j));
82         for (int k = 0; k < numNovels.get(j); k++)   {
83            System.out.print("*");
84         }
85         System.out.println("");
86      }
87   }
88}
89