transpose of a 2D matrix

import javax.swing.JOptionPane;
public class transposeofarray
{
public static void main(String[] args) {
int [][]a= new int[3][3];
int i,j;
System.out.print("enter elements of matrix A");
for( i=0; i<=2; i++)
{
for(j=0; j<=2; j++)
{
a[i][j]=Integer.parseInt(JOptionPane.showInputDialog(" "));
}

}

System.out.print("\nA= ");
for( i=0; i<=2; i++)
{
System.out.print("\n");

for(j=0; j<=2; j++)
{
System.out.print(a[i][j]);
}
}
System.out.print("\n transpose is  ");
for( i=0; i<=2; i++)
{
System.out.print("\n");

for(j=0; j<=2; j++)
{
System.out.print(a[j][i]);
}
}
}

}

output:

enter elements of matrix A

1

2

3

4

5

6

7

8

9

A= 

123

456

789

 transpose is  

147

258

369