NumberPattern.java

public class NumberPattern {
    public static void main(String[] args) {
        int n = 3;
        int num = 1;
        int gap = n - 1;

        for (int i = 1; i <= n; i++) {
            // Print spaces for indentation
            for (int j = 1; j < i; j++) {
                System.out.print("  ");
            }

            // Print the numbers in increasing order
            for (int j = 1; j <= n - i + 1; j++) {
                System.out.print(num++);
                if (j != n - i + 1) {
                    System.out.print("*");
                }
            }

            // Print the numbers in decreasing order
            for (int j = 1; j < i; j++) {
                System.out.print("*" + num++);
            }

            // Adjust the number and gap for the next row
            num += gap--;
            System.out.println();
        }
    }
}