Java Program to Transpose Matrix

by Online Tutorials Library July 22, 2022

Java Program to transpose matrix

Converting rows of a matrix into columns and columns of a matrix into row is called transpose of a matrix.

Let’s see a simple example to transpose a matrix of 3 rows and 3 columns.

 public class MatrixTransposeExample{ public static void main(String args[]){ //creating a matrix int original[][]={{1,3,4},{2,4,3},{3,4,5}};      //creating another matrix to store transpose of a matrix int transpose[][]=new int[3][3];  //3 rows and 3 columns    //Code to transpose a matrix for(int i=0;i<3;i++){   for(int j=0;j<3;j++){   transpose[i][j]=original[j][i]; }   }    System.out.println(“Printing Matrix without transpose:”); for(int i=0;i<3;i++){   for(int j=0;j<3;j++){   System.out.print(original[i][j]+” “);   }   System.out.println();//new line   }   System.out.println(“Printing Matrix After Transpose:”); for(int i=0;i<3;i++){   for(int j=0;j<3;j++){   System.out.print(transpose[i][j]+” “);   }   System.out.println();//new line   }   }} 

Test it Now

Output:

Printing Matrix without transpose: 1 3 4  2 4 3  3 4 5  Printing Matrix After Transpose: 1 2 3  3 4 4  4 3 5

Java Program to display transpose matrix

Let's see another example where we are displaying transpose of a matrix. Here, we are not creating another matrix.

 public class MatrixTransposeExample2{ public static void main(String args[]){ //creating a matrix int original[][]={{1,3,4},{2,4,3},{3,4,5}};    System.out.println("Printing Matrix without transpose:"); for(int i=0;i<3;i++){   for(int j=0;j<3;j++){   System.out.print(original[i][j]+" ");   }   System.out.println();//new line   }   System.out.println("Printing Matrix After Transpose:"); for(int i=0;i<3;i++){   for(int j=0;j<3;j++){   System.out.print(original[j][i]+" ");   }   System.out.println();//new line   }   }} 

Test it Now

Output:

Printing Matrix without transpose: 1 3 4  2 4 3  3 4 5  Printing Matrix After Transpose: 1 2 3  3 4 4  4 3 5

Java program to transpose matrix (Another way)

You can also use a method where values of matrix are not predefined. Here, user has to put the values as input.

 import java.util.Scanner; public class MatrixTransposeExample2  {     public static void main(String args[])       { int i, j; System.out.println("Enter total rows and columns: "); Scanner s = new Scanner(System.in); int row = s.nextInt(); int column = s.nextInt(); int array[][] = new int[row][column]; System.out.println("Enter matrix:");  for(i = 0; i < row; i++)   {        for(j = 0; j < column; j++)           {         array[i][j] = s.nextInt();         System.out.print(" ");             }   } System.out.println("The above matrix before Transpose is ");   for(i = 0; i < row; i++)     {           for(j = 0; j < column; j++)             {           System.out.print(array[i][j]+" ");             }             System.out.println(" ");         }  System.out.println("The above matrix after Transpose is ");   for(i = 0; i < column; i++)     {           for(j = 0; j < row; j++)             {                 System.out.print(array[j][i]+" ");             }             System.out.println(" ");         }     } } 

Output:

Use image MatrixTranspose

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