Java Program to Sort the 2D Array Across Rows

// Java Program to Sort the 2D array Across Rows

// Importing required libraries
import java.io.*;
import java.lang.*;
import java.util.*;

// Main class
public class GFG {

    // Main driver method
    public static void main(String[] args)
        throws java.lang.Exception
    {

        // Custom input 2D matrix
        int[][] arr = { { 1, 8, 4, 7, 3 },
                        { 8, 3, 1, 7, 5 },
                        { 6, 2, 0, 7, 1 },
                        { 2, 6, 4, 1, 9 } };

        // Display message only
        System.out.println("Matrix without sorting \n");

        // Print and display the matrix before sorting
        // using nested for loops
        for (int i = 0; i < 4; i++) {

            for (int j = 0; j < 5; j++) {
                // Printing the matrix elements
                System.out.print(arr[i][j] + " ");
            }

            // New line as we are finished with one row
            System.out.println();
        }

        // New line for better readability
        System.out.println();

        // Creating an object of Vector class
        Vector<Integer> v = new Vector<>();

        for (int i = 0; i < 4; i++) {

            for (int j = 0; j < 5; j++) {
                // Adding elements of row in vector
                v.add(arr[i][j]);
            }

            // Elements in vector gets sorted
            Collections.sort(v);
            for (int j = 0; j < 5; j++) {

                // Sorted elements are pushed back from
                // vector to row
                arr[i][j] = v.get(j);
            }

            // Elements are removed from vector for fresh
            // sorting
            v.removeAll(v);
        }

        // Display message only
        System.out.println("Matrix after sorting \n");

        // Print and display the matrix after sorting
        // using nested for loops
        for (int i = 0; i < 4; i++) {

            for (int j = 0; j < 5; j++) {

                // Printing the matrix elements
                System.out.print(arr[i][j] + " ");
            }

            // New line as we are finished with one row
            System.out.println();
        }
    }
}