Java Program to Print Diamond Outline Character Pattern

Java Program to Print
Diamond Outline Character Pattern

Last Updated: 8 August, 2022

On this tutorial page, we are going to learn how to write a Java program to print the diamond outline character pattern.

A pattern program is composed of two or more loop statements and print statements.

Let's see the Java Character Pattern Program Implementation.

Program: Diamond Outline Character Pattern Program in Java

  import java.util.Scanner;
  public class Pattern19 {
    public static void main(String[] args) {
      char[] charArray = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 
        'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
        'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
      int letter_number = 0;
      
      String[] diamond = new String[26];
      
      System.out.print("Enter a Char between A to Z : ");
      Scanner scanner = new Scanner(System.in);
      char user_input = scanner.next("[A-Z]").charAt(0);
      scanner.close();
      
      for (int i = 0; i < charArray.length; i++) {
        if (charArray[i] == user_input) {
          letter_number = i;
          break;
        }
      }
      
      // printing diamond
      for (int i = 0; i <= letter_number; i++) {
        diamond[i] = "";
        for (int j = 0; j < letter_number - i; j++) {
          diamond[i] += " ";
        }
        
        diamond[i] += charArray[i];
        
        if (charArray[i] != 'A') {
          for (int j = 0; j < 2 * i - 1; j++) {
            diamond[i] += " ";
          }
          diamond[i] += charArray[i];
        }
        System.out.println(diamond[i]);
      }
      
      for (int i = letter_number - 1; i >= 0; i--) {
        System.out.println(diamond[i]);
      }
    }
  }

Java Program to PrintDiamond Outline Character Pattern

Program: Diamond Outline Character Pattern Program in Java

Java Program to Print
Diamond Outline Character Pattern