Java Program to Print Alphabet G Pattern

In this Java pattern program, we show the steps to print the stars in an Alphabet G 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++ )
		{
			for (int j = 0 ; j < 2 * rows; j++ )
			{
				if ((i == 0 || i == rows - 1) && (j == 0 || j == (2 * rows) - 2))
				{
					System.out.printf(" ");
				}
				else if ((j == 0) || (i == 0 && j <= rows) || (i == rows / 2 && j > rows / 2)
						|| (i > rows / 2 && j == (2 * rows) - 1) || (i == rows - 1 && j < 2 * rows))
				{
					System.out.printf("*");
				}
				else
				{
					System.out.printf(" ");
				}
			}
			System.out.println();
		}
	}
}

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

Within this Alphabet G 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 Rows = ");
		rows = sc.nextInt();

	    i = 0 ;
		while ( i < rows )
		{
			j = 0 ;
			while (  j < (2 * rows) - 1)
			{
				if ((i == 0 || i == rows - 1) && (j == 0 || j == (2 * rows) - 3))
				{
					System.out.printf(" ");
				}
				else if ((j == 0) || (i == 0 && j <= rows) || (i == rows / 2 && j > rows / 2)
						|| (i > rows / 2 && j == (2 * rows) - 3) || (i == rows - 1 && j < (2 * rows)- 2))
				{
					System.out.printf("*");
				}
				else
				{
					System.out.printf(" ");
				}
				j++;
			}
			System.out.println();
			i++;
		}
	}
}

Enter Rows = 11
 ***********         
*                    
*                    
*                    
*                    
*     ***************
*                  * 
*                  * 
*                  * 
*                  * 
 ******************  

In this program, we created an AlphabetGShape function to print the Alphabet G 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);

		AlphabetGShape(rows, a);
	}
	public static void AlphabetGShape(int rows, char a) 
	{
		for (int i = 0 ; i < rows; i++ )
		{
			for (int j = 0 ; j < 2 * rows; j++ )
			{
				if ((i == 0 || i == rows - 1) && (j == 0 || j == (2 * rows) - 2))
				{
					System.out.printf(" ");
				}
				else if ((j == 0) || (i == 0 && j <= rows) || (i == rows / 2 && j > rows / 2)
						|| (i > rows / 2 && j == (2 * rows) - 1) || (i == rows - 1 && j < 2 * rows))
				{
					System.out.printf("%c", a);
				}
				else
				{
					System.out.printf(" ");
				}
			}
			System.out.println();
		}
	}
}