Pattern Diamond Program in Java

public class Pattern37
{
    public static void main(String[] args)
    {
        for (int i = 1; i <= 5; i++)
        {
            for (int j = 5 - i; j >= 1; j--)
            {
                System.out.print(" ");
            }
            for (int j = 1; j <= 2 * i - 1; j++)
            {
                System.out.print("*");
            }
            System.out.println();
        }
        for (int i = 4; i >= 1; i--)
        {
            for (int j = 5 - i; j >= 1; j--)
            {
                System.out.print(" ");
            }
            for (int j = 1; j <= 2 * i - 1; j++)
            {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

Output:

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

---

public class Pattern38
{
    public static void main(String[] args)
    {
        for (int i = 1; i <= 5; i++)
        {
            for (int j = 5 - i; j >= 1; j--)
            {
                System.out.print(" ");
            }
            for (int j = 1; j <= 2 * i - 1; j++)
            {
                System.out.print(i);
            }
            System.out.println();
        }
        for (int i = 4; i >= 1; i--)
        {
            for (int j = 5 - i; j >= 1; j--)
            {
                System.out.print(" ");
            }
            for (int j = 1; j <= 2 * i - 1; j++)
            {
                System.out.print(i);
            }
            System.out.println();
        }
    }
}

Output:

    1
   222
  33333
 4444444
555555555
 4444444
  33333
   222
    1

---

public class Pattern39
{
    public static void main(String[] args)
    {
        for (int i = 1; i <= 5; i++)
        {
            for (int j = 5 - i; j >= 1; j--)
            {
                System.out.print(" ");
            }
            for (int j = 1; j <= i; j++)
            {
                System.out.print(j);
            }
            for (int j = i - 1; j >= 1; j--)
            {
                System.out.print(j);
            }
            System.out.println();
        }
        for (int i = 4; i >= 1; i--)
        {
            for (int j = 5 - i; j >= 1; j--)
            {
                System.out.print(" ");
            }
            for (int j = 1; j <= i; j++)
            {
                System.out.print(j);
            }
            for (int j = i - 1; j >= 1; j--)
            {
                System.out.print(j);
            }
            System.out.println();
        }
    }
}

Output:

    1
   121
  12321
 1234321
123454321
 1234321
  12321
   121
    1

b. tech. bca icse java java tutorials learn java mca programs