BlueJ Program on Transpose of Numeric Matrix

In this BlueJ Program, values are stored in an 2-d array and transpose of the matrix is displayed. The transpose of a matrix is simply a flipped version of the original matrix. We can transpose a matrix by switching its rows with its columns. 

Take values in a  n X m matrix and display the transpose of the matrix

import java.util.Scanner;

class Star

{

int n,m,arr[][],i,j;

Scanner sc=new Scanner(System.in);

public void read()

{

System.out.print("\nEnter value of row: ");

n=sc.nextInt();

System.out.print("\nEnter value of column: ");

m=sc.nextInt();

arr=new int [n][m];

for(i=0;i< n;i++)

{

 for(j=0;j< m;j++)

 {

     System.out.print("\nEnter value: ");

     arr[i][j]=sc.nextInt();

}

}

System.out.println("\nOriginal Matrix ");

for(i=0;i< n;i++)

{

 for(j=0;j< m;j++)

 {

     System.out.print(" "+arr[i][j]);

 }

 System.out.println();

}

System.out.println("\nTranspose Matrix ");

for(i=0;i< m;i++)

{

 for(j=0;j< n;j++)

 {

     System.out.print(" "+arr[j][i]);

 }

 System.out.println();

}

}

public static void main(String args[])

{

 Star ob=new Star();

 ob.read();

  }

}