Java - String Rotate

import java.io.*;

class StringRotate {   

    public static void main(String[] args) {

            String inpstring = "";

            InputStreamReader input = new InputStreamReader(System.in);

            BufferedReader reader = new BufferedReader(input);

            try

            {

                  System.out.println("Enter a string to rotate:");

                  inpstring = reader.readLine();

                  int len = inpstring.length();

                  int lastindex = len - 1;

                  char[] outstring = inpstring.toCharArray();

                  for (int i = 0; i < len; i++)

                  {

                        char ch = outstring[0];

                        for (int j = 0; j < len - 1; j++)

                        {

                              outstring[j] = outstring[j + 1];

                        }

                        outstring[len - 1] = ch;

                        {

                              for (int k = 0; k < outstring.length; k++)

                                    System.out.print(outstring[k]);

                              System.out.println();

                        }

                  }

                  System.out.println();

                  System.out.println();

                  for (int i = 0; i < len; i++)

                  {

                        char ch = outstring[len - 1];

                        for (int j = len - 1; j > 0; j--)

                        {

                              outstring[j] = outstring[j - 1];

                        }

                        outstring[0] = ch;

                        {

                              for (int k = 0; k < outstring.length; k++)

                                    System.out.print(outstring[k]);

                              System.out.println();

                        }

                  }

                 

            }

            catch (Exception e)

            {

                  e.printStackTrace();

            }

    }

}

Pascal Triangle

import java.io.*;

import java.lang.*;

class PascalTriangle { 

    public static void main(String[] args) {

            String inpstring = "";

            InputStreamReader input = new InputStreamReader(System.in);

            BufferedReader reader = new BufferedReader(input);

            try

            {

                  System.out.print("Enter number of rows for pascal triangle:");

                  inpstring = reader.readLine();

                  int n = Integer.parseInt(inpstring, 10);

                  for (int y = 0; y < n; y++)

                  {

                        int c = 1;

                        for(int q = 0; q < n - y; q++)

                        {

                              System.out.print("   ");

                        }

                        for(int x = 0; x <= y; x++)

                        {

                              System.out.print("   ");

                              System.out.print(c); // 3 digits

                              System.out.print(" ");

                              c = c * (y - x) / (x + 1);

                        }

                        System.out.println();

                        System.out.println();

                  }

                 

                  System.out.println();

            }

            catch (Exception e)

            {

                  e.printStackTrace();

            }

    }

}

OutPut:

Enter number of rows for pascal triangle:6

                     1

                  1    1

               1    2    1

            1    3    3    1

         1    4    6    4    1

      1    5    10    10    5    1