java classes and methods simple logic with comments

1import java.lang.Math;
2import java.util.Scanner;
3
4public class NumberShapes {
5
6    public static void main(String[] args) {
7
8        class Number {
9
10            int number;
11
12            public boolean isTriangular() {
13
14                int x = 1;
15                int triangularNumber = 1;
16
17                while (triangularNumber < number) { // while number is greater than the triangularNumber keep going.
18                                                    // number >
19                                                    // trianguarNumber
20                    x++;
21
22                    triangularNumber = triangularNumber + x; // triangularNumber += x;
23
24                    // this helps during testing to see how the counter works as we increment
25                    System.out.println(triangularNumber);
26                }
27
28                // after the while loop runs we check what we have left and compare
29                if (triangularNumber == number) {
30                    return true;
31                } else {
32
33                    return false;
34
35                }
36
37            } // end - isTriangular()
38        } // end - Number class
39
40        Number myNumber = new Number();
41
42        myNumber.number = 21;
43
44        System.out.println(myNumber.isTriangular());
45    }
46}