Java Program to Print Alphabet J Pattern

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

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

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

Enter Rows = 17
                *
                *
                *
                *
                *
                *
                *
                *
                *
*               *
*               *
*               *
*               *
*               *
*               *
*               *
 *************** 

In this program, we created an AlphabetJShape function to print the Alphabet J 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);

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