تحديات برمجيةالتحدي الثالث - حل التمرين الأول بلغة جافا

import java.util.Scanner;

public class Main {
    
    public static void main(String[] args) {
        
        Scanner input = new Scanner(System.in);
        int n;
        
        do {
            System.out.print("Enter the number of lines: ");
            n = input.nextInt();
        }
        while( n<=0 || n%2==0 );
        
        for (int i=1; i<=n; i++)
        {
            if(i<=n/2)
            {
                for (int k=1; k<(n/2)-i+2; k++)
                {
                    System.out.print(" ");
                }

                System.out.print("*");
            
                for (int j=1; j<(i*2)-1; j++)
                {
                    System.out.print("*");
                }
            }
            else
            {
                for (int k=1; k<i-(n/2); k++)
                {
                    System.out.print(" ");
                }
                
                System.out.print("*");
            
                for (int j=1; j<=(n*2)-(i*2); j++)
                {
                    System.out.print("*");
                }
            }
            System.out.println();
        }
        
    }

}

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        int n;

        do {
            System.out.print("Enter the number of lines: ");
            n = input.nextInt();
        }
        while (n <= 0 || n % 2 == 0);

        for (int i = 1; i <= (n/2)+1; i++)
        {
            for (int k = 1; k < (n/2)-i+2; k++)
            {
                System.out.print(" ");
            }
            System.out.print("*");

            for (int j = 1; j < (i*2)-1; j++){
                System.out.print("*");
            }

            System.out.println();
        }

        for (int i = 1; i <= (n/2); i++)
        {
            for (int k = 1; k <= i; k++)
            {
                System.out.print(" ");
            }

            for (int j = 1; j < ((n/2)*2)-(i*2)+2; j++)
            {
                System.out.print("*");
            }

            System.out.println();
        }

    }

}

Enter the number of lines: 9
    *
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    *