Program:

1  2  3
6  5  4
7  8  9
12 11 10
13 14 15

• Program:

  public class NumberPattern8
  {
      public static void main(String[] args)
      {
          int n = 5; // Number of rows
          int num = 1; // Starting number
  
          for(int i=1; i<=n; i++)
          {
              if (i % 2 != 0)     // For odd rows, print numbers in increasing order
              {
                  for(int j=1; j<=3; j++)
                  {
                      System.out.print(num + "  ");
                      num++;
                  }
              }
              else    // For even rows, print numbers in decreasing order
              {
                  int temp = num + 2; // Store the highest value in the row
                  for(int j=1; j<=3; j++)
                  {
                      System.out.print(temp + "  ");
                      temp--;
                      num++;
                  }
              }
              System.out.println();
          }
      }
  }