Java: Print an array after changing the rows and columns of a specified two-dimensional array

Last update on May 12 2025 13:10:59 (UTC/GMT +8 hours)

Transpose 2D Array

Write a Java program to print an array after changing the rows and columns of a two-dimensional array.

Original Array:
10 20 30
40 50 60
After changing the rows and columns of the said array:10 40
20 50
30 60

Visual Presentation:

Java Basic Exercises: Print an array after changing the rows and columns of a specified two-dimensional array.

Sample Solution:

Java Code:

import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        // Initializing a 2D array with values
        int[][] twodm = {
                {10, 20, 30},
                {40, 50, 60}
        };
        
        // Displaying the original array
        System.out.print("Original Array:\n");
        print_array(twodm);
        
        // Performing transpose operation on the array
        System.out.print("After changing the rows and columns of the said array:");
        transpose(twodm);
    }
    
    // Method to transpose the given 2D array
    private static void transpose(int[][] twodm) {
        // Creating a new 2D array to store the transposed elements
        int[][] newtwodm = new int[twodm[0].length][twodm.length];
        
        // Transposing the elements of the array
        for (int i = 0; i < twodm.length; i++) {
            for (int j = 0; j < twodm[0].length; j++) {
                newtwodm[j][i] = twodm[i][j];
            }
        }
        
        // Printing the transposed array
        print_array(newtwodm);
    }
    
    // Method to print the elements of a 2D array
    private static void print_array(int[][] twodm) {
        // Looping through the array and printing its elements
        for (int i = 0; i < twodm.length; i++) {
            for (int j = 0; j < twodm[0].length; j++) {
                System.out.print(twodm[i][j] + " ");
            }
            System.out.println();
        }
    }
}

Sample Output:

Original Array:
10 20 30 
40 50 60 
After changing the rows and columns of the said array:10 40 
20 50 
30 60

Flowchart:

For more Practice: Solve these Related Problems:

Write a Java program to transpose a non-square matrix and print the resulting array.
Write a Java program to perform an in-place transpose of a square matrix without using extra space.
Write a Java program to transpose a 2D array and then reverse each row of the transposed matrix.
Write a Java program to transpose a square matrix and calculate the sum of its primary diagonal.

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