Java program to find transpose of a matrix

by February 21, 2017 Java programs

Let’s learn java program to find transpose of a matrix.

Java program to find transpose of a matrix

Java program to transpose matrix is one of the common interview question in java.

Transpose means converting rows of matrix into columns and columns of matrix into row.

For example:

3x3 matrix
-----------------
a11    a12    a13
a21    a22    a23
a31    a32    a33

transposed 3x3 matrix
-----------------
a11    a21    a31
a12    a22    a32
a13    a23    a33

Let’s see 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();
      }
   }
}

Output:

Before matrix transpose:
2 4 6
8 1 3
5 7 9
After matrix transpose:
2 8 5
4 1 7
6 3 9

Also read – abstraction in java