A class JoinArray contains an array of integer elements. Form a new array which will contain…

import java.util.Scanner;

class JoinArray
{
    int arr[];
    int size;

    JoinArray(int s)
    {
        size = s;
        arr = new int[size];
    }

    void accept()
    {
        Scanner sc = new Scanner(System.in);
        for (int i = 0; i < size; i++)
        {
            System.out.print("Enter element: ");
            arr[i] = sc.nextInt();
        }
    }

    JoinArray attach(JoinArray P, JoinArray Q)
    {
        JoinArray R = new JoinArray(P.size + Q.size);
        int k = 0;
        for (int i = Q.size - 1; i >= 0; i--)
            R.arr[k++] = Q.arr[i];
        for (int i = P.size - 1; i >= 0; i--)
            R.arr[k++] = P.arr[i];
        return R;
    }

    void display()
    {
        for (int i = 0; i < size; i++)
            System.out.print(arr[i] + " ");
        System.out.println();
    }

    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter size of Array1: ");
        int s1 = sc.nextInt();
        JoinArray P = new JoinArray(s1);
        P.accept();
        System.out.print("Enter size of Array2: ");
        int s2 = sc.nextInt();
        JoinArray Q = new JoinArray(s2);
        Q.accept();

        JoinArray R = P.attach(P, Q);
        System.out.print("Resultant Array: ");
        R.display();
    }
}