Java Program to Print Diamond Alphabets Pattern

Write a Java program to print diamond alphabets pattern using for loop.

package Alphabets;

import java.util.Scanner;

public class DiamondAlps1 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Diamond Pattern of Alphabets Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Diamond Alphabets Pattern\n");
		int i, j, k, alphabet = 64;
		
		for (i = 1 ; i <= rows; i++ ) 
		{
			for (j = 1 ; j <= rows - i; j++ ) 
			{
				System.out.print(" ");	
			}
			for (k = 1 ; k <= i * 2 - 1; k++ ) 
			{
				System.out.print((char)(alphabet + k) );
			}
			System.out.println();
		}
		
		for (i = rows - 1 ; i > 0; i-- ) 
		{
			for (j = 1 ; j <= rows - i; j++ ) 
			{
				System.out.print(" ");
			}
			for (k = 1 ; k <= i * 2 - 1; k++ ) 
			{
				System.out.print((char)(alphabet + k) );
			}
			System.out.println();
		}
	}
}

It is another way of writing the Java program to display the diamond pattern of alphabets.

package Alphabets;

import java.util.Scanner;

public class DiamondAlps2 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Diamond Pattern of Alphabets Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Diamond Alphabets Pattern\n");
		int i, j, k, alphabet = 65;
		
		for (i = 0; i <= rows - 1; i++ ) 
		{
			for (j = rows - 1 ; j >= i; j-- ) 
			{
				System.out.print(" ");	
			}
			for (k = 0; k <= i; k++ ) 
			{
				System.out.print((char)(alphabet + k) + " ");
			}
			System.out.println();
		}
		
		for (i = 0; i <= rows - 1; i++) 
		{
			for (j = -1 ; j <= i; j++ ) 
			{
				System.out.print(" ");
			}
			for (k = 0; k <= rows - i - 2; k++ ) 
			{
				System.out.print((char)(alphabet + k) + " ");
			}
			System.out.println();
		}
	}
}

Enter Diamond Pattern of Alphabets Rows = 10
Printing Diamond Alphabets Pattern

          A 
         A B 
        A B C 
       A B C D 
      A B C D E 
     A B C D E F 
    A B C D E F G 
   A B C D E F G H 
  A B C D E F G H I 
 A B C D E F G H I J 
  A B C D E F G H I 
   A B C D E F G H 
    A B C D E F G 
     A B C D E F 
      A B C D E 
       A B C D 
        A B C 
         A B 
          A 

This Java example is the other way to print the Diamond pattern of alphabets.

package Alphabets;

import java.util.Scanner;

public class DiamondAlps3 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Diamond Pattern of Alphabets Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Diamond Alphabets Pattern\n");
		int i, j, k, l, alphabet = 64;
		
		for (i = 1 ; i <= rows; i++ ) 
		{
			for (j = 1 ; j <= rows - i; j++ ) 
			{
				System.out.print(" ");	
			}
			for (k = i ; k >= 1; k-- ) 
			{
				System.out.print((char)(alphabet + k));
			}
			for (l = 2 ; l <= i; l++) 
			{
				System.out.print((char)(alphabet + l));
			}
			System.out.println();
		}
		
		for (i = rows - 1 ; i > 0; i-- ) 
		{
			for (j = 1 ; j <= rows - i; j++ ) 
			{
				System.out.print(" ");
			}
			for (k = i ; k >= 1; k-- ) 
			{
				System.out.print((char)(alphabet + k));
			}
			for (l = 2 ; l <= i; l++) 
			{
				System.out.print((char)(alphabet + l));
			}
			System.out.println();
		}
	}
}

Enter Diamond Pattern of Alphabets Rows = 15
Printing Diamond Alphabets Pattern

              A
             BAB
            CBABC
           DCBABCD
          EDCBABCDE
         FEDCBABCDEF
        GFEDCBABCDEFG
       HGFEDCBABCDEFGH
      IHGFEDCBABCDEFGHI
     JIHGFEDCBABCDEFGHIJ
    KJIHGFEDCBABCDEFGHIJK
   LKJIHGFEDCBABCDEFGHIJKL
  MLKJIHGFEDCBABCDEFGHIJKLM
 NMLKJIHGFEDCBABCDEFGHIJKLMN
ONMLKJIHGFEDCBABCDEFGHIJKLMNO
 NMLKJIHGFEDCBABCDEFGHIJKLMN
  MLKJIHGFEDCBABCDEFGHIJKLM
   LKJIHGFEDCBABCDEFGHIJKL
    KJIHGFEDCBABCDEFGHIJK
     JIHGFEDCBABCDEFGHIJ
      IHGFEDCBABCDEFGHI
       HGFEDCBABCDEFGH
        GFEDCBABCDEFG
         FEDCBABCDEF
          EDCBABCDE
           DCBABCD
            CBABC
             BAB
              A