OOP-Assignment for printing Fibonacci series and swapping two numbers using methods

work.java

package work;
import java.util.Scanner;

public class Work {
    
    public static void main(String[] args) {
        
        Scanner input = new Scanner(System.in);
        
        System.out.println("Enter num1 : ");
        int n1 = input.nextInt();
        
        System.out.println("Enter num2 : ");
        int n2 = input.nextInt();
        
        swapWithTemp(n1,n2);
        swapWithoutTemp(n1,n2);
        
        System.out.println("Enter max no of range you want to display fibonacci series : ");
        int r = input.nextInt();
        
        fibonacciSeries(r);
        
    }
    
    public static void fibonacciSeries(int range){
        
        int num1 , num2 , next;
        
        num1 = 0;
        num2 = 1;
        
        System.out.println("**************************** FIBONACCI SERIES IS ********************");
           
        System.out.println(num1);
        System.out.println(num2);
        
        for(int i=1 ; i<=range-2 ; i++){
            
            next = num1 + num2;
            System.out.println(next);
            
            num1 = num2;
            num2 = next;
            
        }
        
    }
    
    public static void swapWithTemp(int a , int b){
        
        System.out.println("******************** SWAPPING WITH TEMPORARY VARIABLE ******************");
        
        int temp;
        System.out.println("value of a " + a);
        System.out.println("value of b "+b);
        
        temp = a;
        a = b;
        b = temp;
        
        System.out.println("value of a " + a);
        System.out.println("value of b "+b);
        
    }
      
    public static void swapWithoutTemp(int a ,int b){
        
        System.out.println("************** SWAPPING WITHOUT TEMP ************");
        System.out.println("Value of a "+a);
        System.out.println("Value of b "+b);
        
        a = a + b;
        b = a - b;
        a = a - b;
        
        System.out.println("Value of a"+a);
        System.out.println("Value of b"+b);
        
    }
    
}