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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