transpose of a matrix in java without using second matrix

1import java.util.Scanner;
2public class MatrixTransposeInJava
3{
4   public static void main(String[] args)
5   {
6      int[][] arrGiven = {{2,4,6},{8,1,3},{5,7,9}};	    
7      // another matrix to store transpose of matrix  
8      int[][] arrTranspose = new int[3][3];	    
9      // transpose matrix code  
10      for(int a = 0; a < 3; a++)
11      {    
12         for(int b = 0; b < 3; b++)
13         {    
14            arrTranspose[a][b] = arrGiven[b][a];  
15         } 
16      }	  
17      System.out.println("Before matrix transpose: ");  
18      for(int a = 0; a < 3; a++)
19      {    
20         for(int b = 0; b < 3; b++)
21         {    
22            System.out.print(arrGiven[a][b] + " ");    
23         } 
24         System.out.println();
25      }    
26      System.out.println("After matrix transpose: ");  
27      for(int a = 0; a < 3; a++)
28      {    
29         for(int b = 0; b < 3; b++)
30         {    
31            System.out.print(arrTranspose[a][b] + " ");    
32         } 
33         System.out.println();
34      }
35   }
36}

1// transpose of a matrix in java without using second matrix
2import java.util.Scanner;
3public class WithoutSecondMatrix
4{
5   public static void main(String[] args)
6   {
7      Scanner sc = new Scanner(System.in);
8      int a, b, row, column, temp;
9      System.out.println("Please enter number of rows: ");
10      row = sc.nextInt();
11      System.out.println("Please enter the number of columns: ");
12      column = sc.nextInt();
13      int[][] matrix = new int[row][column];
14      System.out.println("Please enter elements of matrix: ");
15      for(a = 0; a < row; a++)
16      {
17         for(b = 0; b < column; b++)
18         {
19            matrix[a][b] = sc.nextInt();
20         }
21      }
22      System.out.println("Elements of the matrix: ");
23      for(a = 0; a < row; a++)
24      {
25         for(b = 0; b < column; b++)
26         {
27            System.out.print(matrix[a][b] + "\t");
28         }
29         System.out.println("");
30      }
31      // transpose of a matrix
32      for(a = 0; a < row; a++)
33      {
34         for(b = 0; b < a; b++)
35         {
36            temp = matrix[a][b];
37            matrix[a][b] = matrix[b][a];
38            matrix[b][a] = temp;
39         }
40      }
41      System.out.println("transpose of a matrix without using second matrix: ");
42      for(a = 0; a < row; a++)
43      {
44         for(b = 0; b < column; b++)
45         {
46            System.out.print(matrix[a][b] + "\t");
47         }
48         System.out.println("");
49      }
50      sc.close();
51   }
52}

1for (int row = 0; row < matrix.length; row++) {
2    
3   for (int col = row; col < matrix[row].length; col++) 
4   {
5    	// Swap 
6     	int data = matrix[row][col];
7    	matrix[row][col] = matrix[col][row];
8   		matrix[col][row] = data;
9   }
10  
11  }