Java Program to Print Alphabet D Pattern

In this Java pattern program, we show the steps to print the stars in an Alphabet D shape or pattern using for loop, while loop, and functions.

import java.util.Scanner;

public class Example 
{
	private static Scanner sc;
	
	public static void main(String[] args) 
	{
		sc = new Scanner(System.in);
		
		System.out.print("Enter Rows = ");
		int rows = sc.nextInt();

		for (int i = 0; i < rows; i++) 
		{
			System.out.printf("*");
			
			for (int j = 0; j < rows; j++) 
			{
				if ((i == 0 || i == rows - 1 ) && (j < rows - 2))
				{
					System.out.printf("*");
				}
				else if (i != 0 && i != rows - 1 && j == rows - 2)
				{
					System.out.printf("*");
				}
				else
				{
					System.out.printf(" ");
				}
			}
			System.out.println();
		}
	}
}

Enter Rows = 15
**************  
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
*             * 
**************  

Within this Alphabet D shape or Pattern program, we replaced the for loop with a while loop to print the stars at each position. For more Alphabet Patterns and star pattern programs, please use the hyperlinks.

import java.util.Scanner;

public class Example 
{
	private static Scanner sc;
	
	public static void main(String[] args) 
	{
		sc = new Scanner(System.in);
		int rows, i, j;
		
		System.out.print("Enter Numbers of Rows = ");
		rows = sc.nextInt();

	    i = 0;
	    while (i < rows)
	    {
	    	if  (i > 0 && i < rows -  1)
	    	{
	    		System.out.printf("*");
	    	}
	    	j = 0;
	        while ( j < rows / 2)
	        {
	        	if ((i == 0 || i == rows - 1 || j == rows / 2 - 1))
	        	{
	        		System.out.printf("*");
	        	}
				else
				{
					System.out.printf(" ");
				}
	        	j++;
	        }
			System.out.println();
			i++;
		}
	}
}

Enter Numbers of Rows = 10
*****
*    *
*    *
*    *
*    *
*    *
*    *
*    *
*    *
*****

In this program, we created an AlphabetDShape function to print the Alphabet D Pattern or shape filled with stars on rows and columns.

import java.util.Scanner;

public class Example 
{
	private static Scanner sc;
	
	public static void main(String[] args) 
	{
		sc = new Scanner(System.in);
		
		System.out.print("Enter Rows = ");
		int rows = sc.nextInt();
		
		System.out.print("Enter Character = ");
		char a = sc.next().charAt(0);
		
		AlphabetDShape(rows, a);
	}
	public static void AlphabetDShape(int rows, char a) 
	{
		for (int i = 0; i < rows; i++) 
		{
			System.out.printf("%c", a);
			
			for (int j = 0; j < rows; j++) 
			{
				if ((i == 0 || i == rows - 1 ) && (j < rows - 2))
				{
					System.out.printf("%c", a);
				}
				else if (i != 0 && i != rows - 1 && j == rows - 2)
				{
					System.out.printf("%c", a);
				}
				else
				{
					System.out.printf(" ");
				}
			}
			System.out.println();
		}
	}
}