Matrix Rotations (+ 90 / -90 Degrees)

import java.util.Scanner;

class Matrix

{

    int a[][] =new int[5][5];

    int b[][] =new int[5][5];

    int i=0,j=0, row,col,temp,count=0;

    Scanner s=new Scanner(System.in);

    void get()

    {

        System.out.println("Enter the no. of rows & columns");

        row=s.nextInt();

        col=s.nextInt();

        System.out.println("Eneter the Matrix values");

        for(i=0;i<row;i++)

        {

            for(j=0;j<col;j++)

                a[i][j]=s.nextInt();

        }

    }

   void transpose()

    {      

        for(i=0;i<row;i++)

        {

            for(j=0;j<col;j++)

                b[i][j]=a[j][i];

        }       

    }

       void rowrev()

    {

         for(i=0;i<row;i++)

        {

            for(j=0;j<col/2;j++)

            {

                temp=b[i][j];

            b[i][j]=b[i][row-1-j];

            b[i][row-1-j]=temp;

            }

        }

    }

  

 void colrev()

    {

         for(i=0;i<row/2;i++)

        {

            for(j=0;j<col;j++)

            {

                temp=b[i][j];

            b[i][j]=b[col-1-i][j];

            b[col-1-i][j]=temp;

            }

        }

    }

    void display()

    {

        for(i=0;i<row;i++)

        {

            for(j=0;j<col;j++)

                System.out.print(" "+b[i][j]);

            System.out.println();

        }

    }

}

public class MatrixRotation

{

  public static void main(String  SoftwareDevelopmentLab2015[])

  {

      int ch=0;

       Matrix m=new Matrix();

       Scanner s=new Scanner(System.in);

       while(ch<3)

       {

       System.out.println("Matrix Rotation operations");

       System.out.println("**************************");

       System.out.println("1. +90 degree Rotation");

       System.out.println("2. -90 degree Rotation");

       System.out.println("3.Exit");

       System.out.println("Enter your choice");

       ch=s.nextInt();

       switch(ch)

       {

           case 1:

               m.get();

               m.transpose();

               m.rowrev();

               System.out.println(" +90 Degree Rotation");

               m.display();

               break;

           case 2:

               m.get();

               m.transpose();

               m.colrev();

               System.out.println(" -90 Degree Rotation");

               m.display();

               break;

         }

     }

  }

}

OUTPUT:-

Matrix Rotation operations

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

1. +90 degree Rotation

2. -90 degree Rotation

3.Exit

Enter your choice          1

Enter the no. of rows & columns

3

3

Enter the Matrix values

1 2 3

4 5 6

7 8 9

 +90 Degree Rotation

 7 4 1

 8 5 2

 9 6 3

Matrix Rotation operations

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

1. +90 degree Rotation

2. -90 degree Rotation

3.Exit

Enter your choice          2

Enter the no. of rows & columns

3

3

Enter the Matrix values

1 2 3

4 5 6

7 8 9

 -90 Degree Rotation

 3 6 9

 2 5 8

 1 4 7

Matrix Rotation operations

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

1. +90 degree Rotation

2. -90 degree Rotation

3.Exit

Enter your choice          3