Java Program to Print X Star Pattern

In this article, we will understand how to print X star pattern. The pattern is formed by using multiple for-loops and print statements.

Below is a demonstration of the same: −

Input

Suppose our input is −

Enter the number : 8

Output

The desired output would be −

The X star pattern :
X                 X
 X               X
  X             X
   X           X
    X         X
     X       X
      X    X
        X
       X  X
      X   X
    X       X
   X         X
  X           X
 X             X
X               X

Algorithm

Step 1 - START
Step 2 - Declare four integer values namely i, j, k and my_input.
Step 3 - Read the required values from the user/ define the values
Step 4 - Assign value of ‘my_input – 1’ to ‘k’
Step 5 - We iterate through two nested 'for' loops to get space between the characters.
Step 6 - After iterating through the innermost loop, we iterate through another 'for' loop. This will help print the required character.
Step 7 - Now, print a newline to get the specific number of characters in the subsequent lines.
Step 8 - Display the result
Step 9 - Stop

Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in our coding ground tool .

import java.util.Scanner;
public class XStar{
   public static void main(String []args){
      int i, j, k, my_input;
      System.out.println("Required packages have been imported");
      Scanner my_scanner = new Scanner(System.in);
      System.out.println("A reader object has been defined ");
      System.out.print("Enter the number : ");
      my_input = my_scanner.nextInt();
      System.out.print("The X star pattern : ");
      k=my_input*2-1;
      for( i=1;i<=k;i++){
         for( j=1;j<=k;j++){
            if(j==i || j==k-i+1)
               System.out.print("X");
               System.out.print(" ");
         }
         System.out.println();
       }
    }
}

Output

Required packages have been imported
A reader object has been defined
Enter the number : 8
The X star pattern : X X
X                  X
 X                X
  X              X
   X           X
    X        X
      X    X
        X
       X   X
      X     X
     X       X
    X         X
   X           X
  X             X
 X                X

Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class XStar{
   public static void main(String []args){
      int i, j, k, my_input;
      my_input = 8;
      System.out.println("The number of rows is defined as " +my_input);
      System.out.print("The X star pattern : ");
      k=my_input*2-1;
      for( i=1;i<=k;i++){
         for( j=1;j<=k;j++){
            if(j==i || j==k-i+1)
               System.out.print("X");
                System.out.print(" ");
          }
          System.out.println();
      }
   }
}

Output

The number of rows is defined as 8
The X star pattern : X X
   X            X
    X          X
     X        X
      X      X
       X    X
        X  X
          X
        X  X
      X      X
     X         X
    X           X
   X             X
  X               X
 X                 X