Java Program to Print Windows Star Pattern

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Program to Print Windows Star Pattern

In this article we are going to see how to print window star program.

Example-1

When row value=5      

* * * * * 
*    *   * 
* * * * * 
*    *   * 
* * * * *
Example-2:

When row value=6

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

Now, let’s see the actual program to print it.

Beginners and experienced programmers can rely on these Best Java Programs Examples and code various basic and complex logics in the Java programming language with ease.

Approach:

  • Enter total row and store it in an integer variable row.
  • Calculate middle element.
    •  if n is odd we get 1 element .
    •  in case of n is even we get 2 values.
  • Take first for loop to print the row value and a star for each row .
    • Take first inner for loop to print column value i.e., star  according to condition
      if (r == 1 || c == 1 || r == row || c == row) and if (r == a || c == a) and if (r == b || c == b)  else it will print space .
  • Then go on printing the star symbol according to loop.

JAVA Code:

Method-1:  Static Star Character

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   
    // taking variable for loop iteration and row .
    int row,r,c,a,b;
    //creating object 
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    // If n is odd then we will have only one middle element
    if (row % 2 != 0)
    {
      a = (row / 2) + 1;
      b = 0;
    }
    // If n is even then we will have two values
    else
    {
      a = (row / 2) + 1;
      b = row / 2 ;
    } 
    for(  r = 1; r <= row; r++)
    {
      for( c = 1; c <= row ; c++)
      {
 
        // If i,j equals to corner row  or column then "*"
        if (r == 1 || c == 1 || r == row || c == row)
          System.out.print("* ");          
        else
        {
 
          // If i,j equals to the middle  row or column then  "*"
          if (r == a || c == a)
            System.out.print("* ");
          else if (r == b || c == b)
            System.out.print("* ");
          else
            System.out.print("  ");
        }
      }
      System.out.println();
    }
  }
}

Output :

Enter row :  5 

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

Method-2: User Input Character

import java.util.*;
public class Main 
{    
    public static void main(String args[])   
    {   
    // taking variable for loop iteration and row .
    int row,r,c,a,b;
    char window;
    //creating object 
    Scanner s = new Scanner(System.in);
    // entering the number of row
    System.out.print("Enter rows : ");
    row = s.nextInt();
    // entering any random character
    System.out.print("Enter rows : ");
    window = s.next().charAt(0);
    // If n is odd then we will have only one middle element
    if (row % 2 != 0)
    {
      a = (row / 2) + 1;
      b = 0;
    }
    // If n is even then we will have two values
    else
    {
      a = (row / 2) + 1;
      b = row / 2 ;
    } 
    for(  r = 1; r <= row; r++)
    {
      for( c = 1; c <= row ; c++)
      {
 
        // If i,j equals to corner row  or column then "*"
        if (r == 1 || c == 1 || r == row || c == row)
          System.out.print(window+" ");          
        else
        {
 
          // If i,j equals to the middle  row or column then  "*"
          if (r == a || c == a)
            System.out.print(window+" ");
          else if (r == b || c == b)
            System.out.print(window+" ");
          else
            System.out.print("  ");
        }
      }
      System.out.println();
    }
  }
}

Output :

Enter row :  5 
Enter character : #

# # # # #
#    #    #
# # # # #
#    #    #
# # # # #

C Code:

#include <stdio.h>
int main() {
   int r, row, a,b,c ;
   printf("Enter rows: ");
   scanf("%d", &row);
   if (row % 2 != 0)
    {
      a = (row / 2) + 1;
      b = 0;
    }
    else
    {
      a = (row / 2) + 1;
      b = row / 2 ;
    } 
   
 for(  r = 1; r <= row; r++)
    {
      for( c = 1; c <= row ; c++)
      {
        if (r == 1 || c == 1 || r == row || c == row)
          printf("* ");          
        else
        {
          if (r == a || c == a)
             printf("* ");
          else if (r == b || c == b)
             printf("* ");
          else
            printf("  ");
        }
      }
      printf ("\n");
    }
   return 0;
}

Output :

Enter row :  5 

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

 C++ Code:

#include <iostream>
using namespace std;
int main()
{
   int row, r , c ,a,b ;
   cout << "Enter  rows: ";
   cin >> row;
    if (row % 2 != 0)
    {
      a = (row / 2) + 1;
      b = 0;
    }
    else
    {
      a = (row / 2) + 1;
      b = row / 2 ;
    } 
    for(  r = 1; r <= row; r++)
    {
      for( c = 1; c <= row ; c++)
      {
        if (r == 1 || c == 1 || r == row || c == row)
          cout << "* ";          
        else
        {
          if (r == a || c == a)
             cout << "* ";
          else if (r == b || c == b)
             cout << "* ";
          else
            cout << "  ";
        }
      }
      cout << "\n";
    }
   return 0;
}


Output :

Enter row :  5 

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

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