Java Program to Transpose Matrix

Write a Java Program to Transpose a Matrix with an example or convert rows into columns in a given multi-dimensional array. Here, Transpose means converting rows into columns and columns into rows. 

Java Program to Transpose Matrix using for loop

In this example, we declared a 3 * 3 org_arr integer with random values and another to store the transposed matrix. Next, we used a for loop to iterate the org_arr items. Within the nested for loop, we assigned the org_arr rows to tras_arr columns.

public class Example {
	public static void main(String[] args) {
		
		int i, j;	
		
		int[][] org_arr = {{15, 25, 35}, {45, 55, 65}, {75, 85, 95}};
		int[][] trans_arr = new int[3][3];
		

		for(i = 0; i < org_arr.length ; i++)
		{
			for(j = 0; j < org_arr[0].length; j++)
			{
				trans_arr[j][i] = org_arr[i][j];
			}
		}
		
		System.out.println("\nOriginal Items are :");
		for(i = 0; i < org_arr.length ; i++)
		{
			for(j = 0; j < org_arr[0].length; j++)
			{
				System.out.format("%d \t", org_arr[i][j]);
			}
			System.out.print("\n");
		}
		
		System.out.println("\nAfter Transposing Items are :");
		for(i = 0; i < trans_arr.length ; i++)
		{
			for(j = 0; j < trans_arr[0].length; j++)
			{
				System.out.format("%d \t", trans_arr[i][j]);
			}
			System.out.print("\n");
		}
	}
}

Original Items are :
15 	25 	35 	
45 	55 	65 	
75 	85 	95 	

After Transposing Items are :
15 	45 	75 	
25 	55 	85 	
35 	65 	95 	

This Java code is the same as the above. However, this matrix code allows users to enter the number of rows, columns, and items.

import java.util.Scanner;

public class TransposeMatrix {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		int i, j, rows, columns;
		
		sc= new Scanner(System.in);
		
		System.out.println("\n Enter Rows and Columns :  ");
		rows = sc.nextInt();
		columns = sc.nextInt();
		
		int[][] org_arr = new int[rows][columns];
		int[][] trans_arr = new int[rows][columns];
		
		System.out.println("\n Please Enter the Items :  ");
		for(i = 0; i < rows; i++) {
			for(j = 0; j < columns; j++) {
				org_arr[i][j] = sc.nextInt();
			}		
		}

		for(i = 0; i < org_arr.length ; i++)
		{
			for(j = 0; j < org_arr[0].length; j++)
			{
				trans_arr[j][i] = org_arr[i][j];
			}
		}
		
		System.out.println("\nAfter Transposing Matrix Items are :");
		for(i = 0; i < trans_arr.length ; i++)
		{
			for(j = 0; j < trans_arr[0].length; j++)
			{
				System.out.format("%d \t", trans_arr[i][j]);
			}
			System.out.print("\n");
		}
	}
}