transpose of a matrix in java code example

Example 1: in place transpose in a matrix in java

//Transpose a Matrix

  for (int row = 0; row < matrix.length; row++) {
    
   for (int col = row; row < matrix[row].length; col++) 
   {
    	// Swap 
     	int data = matrix[row][col];
    	matrix[row][col] = matrix[col][row];
   		matrix[col][row] = data;
   }
  
  }

Example 2: java program to find transpose of a matrix

import java.util.Scanner;
public class MatrixTransposeInJava
{
   public static void main(String[] args)
   {
      int[][] arrGiven = {{2,4,6},{8,1,3},{5,7,9}};	    
      // another matrix to store transpose of matrix  
      int[][] arrTranspose = new int[3][3];	    
      // transpose matrix code  
      for(int a = 0; a < 3; a++)
      {    
         for(int b = 0; b < 3; b++)
         {    
            arrTranspose[a][b] = arrGiven[b][a];  
         } 
      }	  
      System.out.println("Before matrix transpose: ");  
      for(int a = 0; a < 3; a++)
      {    
         for(int b = 0; b < 3; b++)
         {    
            System.out.print(arrGiven[a][b] + " ");    
         } 
         System.out.println();
      }    
      System.out.println("After matrix transpose: ");  
      for(int a = 0; a < 3; a++)
      {    
         for(int b = 0; b < 3; b++)
         {    
            System.out.print(arrTranspose[a][b] + " ");    
         } 
         System.out.println();
      }
   }
}

Example 3: transpose of a matrix in java without using second matrix

// transpose of a matrix in java without using second matrix
import java.util.Scanner;
public class WithoutSecondMatrix
{
   public static void main(String[] args)
   {
      Scanner sc = new Scanner(System.in);
      int a, b, row, column, temp;
      System.out.println("Please enter number of rows: ");
      row = sc.nextInt();
      System.out.println("Please enter the number of columns: ");
      column = sc.nextInt();
      int[][] matrix = new int[row][column];
      System.out.println("Please enter elements of matrix: ");
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < column; b++)
         {
            matrix[a][b] = sc.nextInt();
         }
      }
      System.out.println("Elements of the matrix: ");
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < column; b++)
         {
            System.out.print(matrix[a][b] + "\t");
         }
         System.out.println("");
      }
      // transpose of a matrix
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < a; b++)
         {
            temp = matrix[a][b];
            matrix[a][b] = matrix[b][a];
            matrix[b][a] = temp;
         }
      }
      System.out.println("transpose of a matrix without using second matrix: ");
      for(a = 0; a < row; a++)
      {
         for(b = 0; b < column; b++)
         {
            System.out.print(matrix[a][b] + "\t");
         }
         System.out.println("");
      }
      sc.close();
   }
}

Example 4: transpose of a matrix java

for (int row = 0; row < matrix.length; row++) {
    
   for (int col = row; col < matrix[row].length; col++) 
   {
    	// Swap 
     	int data = matrix[row][col];
    	matrix[row][col] = matrix[col][row];
   		matrix[col][row] = data;
   }
  
  }