Program to import a package that will swap two nos

Step 1:

//Package for swapping two numbers
//Developed By Ahlam Ansari
package SwapNos;
public class Swap
{
    int a,b;
    public Swap(int x,int y)
    {
        a=x;
        b=y;
    }
   
    public void withoutTemp()
    {
        a=a+b;
        b=a-b;
        a=a-b;
    }   
   
    public void withTemp()
    {
        int temp;
        temp=a;
        a=b;
        b=temp;
    }   
   
    public void display()
    {
        System.out.print("Values are :\n a=" +a+" b="+b);
    }
}

/*

C:\Users\Ahlam\Google Drive\My Lectures\Fall\OOPM\Programs>javac -d . Swap.java
*/


Step 2:

//Program to import a package that will swap two nos
//Developed by Ahlam Ansari
import java.util.*;
import SwapNos.Swap;
class MainSwap
{
    public static void main(String ahlam[])
    {
        int a,b;
        Scanner d=new Scanner(System.in);
        System.out.println("Enter the two numbers to be swapped");
        a=d.nextInt();
        b=d.nextInt();
        Swap s=new Swap(a,b);
        System.out.println("Before Swapping:");
        s.display();
        System.out.println("\nPress 1 for swapping using temporary variable \nPress 2 for swapping without temporary variable");
        int choice=d.nextInt();
        switch(choice)
        {
            case 1: s.withTemp();
                break;
            case 2: s.withoutTemp();
                break;
            default: System.out.println("Invalid Choice");
        }
        System.out.println("After Swapping:");
        s.display();

    }
}

/*
Output

C:\Users\Ahlam\Google Drive\My Lectures\Fall\OOPM\Programs>javac MainSwap.java

C:\Users\Ahlam\Google Drive\My Lectures\Fall\OOPM\Programs>java MainSwap
Enter the two numbers to be swapped
432
234
Before Swapping:
Values are :
 a=432 b=234
Press 1 for swapping using temporary variable
Press 2 for swapping without temporary variable
1
After Swapping:
Values are :
 a=234 b=432
C:\Users\Ahlam\Google Drive\My Lectures\Fall\OOPM\Programs>java MainSwap
Enter the two numbers to be swapped
234
432
Before Swapping:
Values are :
 a=234 b=432
Press 1 for swapping using temporary variable
Press 2 for swapping without temporary variable
2
After Swapping:
Values are :
 a=432 b=234
C:\Users\Ahlam\Google Drive\My Lectures\Fall\OOPM\Programs>
*/