Really need help in understanding how to write out this code

Really need help in understanding how to write out this code properly. It is kind of long. Thank you in advance for any help received.

5.7 Program: Data visualization (Java)

Sample Code:

import java.util.Scanner;
import java.util.ArrayList;

public class DataVisualizer {
public static void main(String[] args) {
/* Type your code here. */
  
return;
}   
}

(1) Prompt the user for a title for data. Output the title. (1 pt) Ex: Enter a title for the data Number of Novels Authored You entered: Number of Novels Authored (2) Prompt the user for the headers of two columns of a table. Output the column headers. (1 pt) Ex: Enter the column 1 header: Author name You entered Author name Enter the column 2 header Number of novels You entered: Number of novels (3) Prompt the user for data points. Data points must be in this format: string, int. Store the information before the comma into a string variable and the information after the comma into an integer. The user will enter -1 when they have finished entering data points. Output the data points. Store the string components of the data points in an ArrayList of strings. Store the integer components of the data points in a second ArrayList of integers (4 pts)

Solution

HI, Please find my implementation.

Please let me know in case of any issue.

import java.util.Scanner;

import java.util.ArrayList;

public class DataVisualizer {

   public static void main(String[] args) {

       /* Type your code here. */

      

       Scanner input = new Scanner(System.in);

      

       //1

       System.out.print(\"Enter title for the data: \");

       String title = input.nextLine();

       System.out.println(\"You entered: \"+title);

      

       //2

       System.out.print(\"Enter e column 1 header: \");

       String header1 = input.nextLine();

       System.out.println(\"You entered: \"+header1);

       System.out.print(\"Enter e column 2 header: \");

       String header2 = input.nextLine();

       System.out.println(\"You entered: \"+header2);

      

       //3.

       ArrayList<String> strList = new ArrayList<>();

       ArrayList<Integer> intList = new ArrayList<>();

       while(true){

          

           System.out.print(\"Enter a data point (-1 to stop input): \");

           String point = input.nextLine();

          

           if(\"-1\".equalsIgnoreCase(point.trim()))

               break;

          

           int index = point.indexOf(\',\');

           // if there is a comma in input

           if(index != -1){

               String pointStr = point.substring(0, index).trim();

               String str = point.substring(index+1).trim();

              

               // if only one comma is in input

               if(str.indexOf(\',\') == -1){

                   try{

                       int x = Integer.parseInt(str);

                       System.out.println(\"Data string: \"+pointStr);

                       System.out.println(\"Data integer: \"+x);

                      

                       // adding in list

                       strList.add(pointStr);

                       intList.add(x);

                   }catch(Exception e){

                       System.out.println(\"Comma not followed by an integer\");

                   }

               }else{

                   System.out.println(\"To many commas in input\");

               }

              

           }else{

               System.out.println(\"No comma in string\");

           }

          

       }

      

       System.out.println();

       System.out.println(title);

       System.out.println(header1+\"\\t|\\t\"+header2);

       for(int i=0; i<intList.size(); i++){

           System.out.println(strList.get(i)+\"\\t|\\t\"+intList.get(i));

       }

   }

}

/*

Sample run:

Enter title for the data: Number of Novels Authored

You entered: Number of Novels Authored

Enter e column 1 header: Author name

You entered: Author name

Enter e column 2 header: Number of novels

You entered: Number of novels

Enter a data point (-1 to stop input): Jane Austen, 9

Data string: Jane Austen

Data integer: 9

Enter a data point (-1 to stop input): Ernest Hig, 8

Data string: Ernest Hig

Data integer: 8

Enter a data point (-1 to stop input): Alex Bob 5

No comma in string

Enter a data point (-1 to stop input): -1

Number of Novels Authored

Author name   |   Number of novels

Jane Austen   |   9

Ernest Hig   |   8

*/