Question

I'm a little crunched for time and need some help with these first two questions. Thank you!

Question 1.)

Write a Java program that reads in sequence of integers from the user until user enters a negative number and stores them in an Integer ArrayList. Once read, display a bar chart based on the values stored in the ArrayList.

For example, if the user inputs 2, 5, 3, 8, 4, and -1, then your program should display the bar chart as follows:

1 2
1 2 3 4 5
1 2 3
1 2 3 4 5 6 7 8
1 2 3 4

2.)

Write a Java program that does the following.

a. Declare an integer 2D array with 5 rows and 5 columns.

b. Initialize the array's elements to random integers between 1 and 10 (inclusive).

c. Display all the elements in the 2D array as a table of rows and columns.

d. Display the row index and column index of all the even integers in the 2D array.

e. Display the sum of first row's elements.

Answer 1

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

public class BarChart {

        static Scanner scnr = new Scanner(System.in);
        public static void main(String[] args) {
                
                ArrayList<Integer> numbers = new ArrayList<>();
                
                while(true) {
                        System.out.println("Enter a number: ");
                        int x = scnr.nextInt();
                        if(x < 0) {
                                break;
                        }
                        numbers.add(x);
                }
                
                for(int n: numbers) {
                        for(int j=1; j<=n; j++) {
                                System.out.print(j + " ");
                        }
                        System.out.println();
                }
                
        }

}

Please ask both questions separately, as they require different code altogether. Thanks!