How to print Hollow Diamond Pattern in Java - Step by Step Examples

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How to print Hollow Diamond Pattern in Java ?

Answer

To print a Hollow Diamond Pattern in Java, we use nested loops to manage spaces and stars.

✐ Examples

1 Print Hollow Diamond Pattern in Java

In this example,

We assume the number of rows for the diamond is 5.
We then use nested loops where the outer loop controls the rows and the inner loop manages spaces and stars.
Within the loops, we use conditions to print stars only at specific positions to create the hollow diamond effect.
The outer loop manages the rows of the diamond, incrementing and decrementing based on the midpoint of the diamond.
The inner loop calculates the spaces required to position the stars correctly, ensuring the hollow diamond pattern.
Stars are printed based on conditions to achieve the desired hollow diamond pattern.

Java Program

// Print Hollow Diamond Pattern in Java
public class Main {
    public static void main(String[] args) {
        int numRows = 5;

        for (int row = 1; row <= numRows; row++) {
            for (int space = 1; space <= numRows - row; space++) {
                System.out.print(" ");
            }
            for (int star = 1; star <= 2 * row - 1; star++) {
                if (star == 1 || star == 2 * row - 1) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }

        for (int row = numRows - 1; row >= 1; row--) {
            for (int space = 1; space <= numRows - row; space++) {
                System.out.print(" ");
            }
            for (int star = 1; star <= 2 * row - 1; star++) {
                if (star == 1 || star == 2 * row - 1) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }
}

Output

    *
   * *
  *   *
 *     *
*       *
 *     *
  *   *
   * *
    *

Summary

In this tutorial, we learned How to print Hollow Diamond Pattern in Java language with well detailed examples.