previous fibonacci Using Loops

public class Fibonacci {

    int firstFib = 1;
    int secondFib = 1;

    public void forFib(int numOfFib) {
        if (numOfFib == 1) {
            System.out.println("Using For Loop: 0");
        } else if (numOfFib == 2) {
            System.out.println("Using For Loop: 0 " + firstFib);
        //} 
        //else if (numOfFib == 2) {
        //    System.out.println("Using For Loop: 0 " + firstFib + " " + secondFib);
        } else if (numOfFib > 2) {
            int prevFib = firstFib;
            int currentFib = secondFib;
            int nextFib;
            System.out.print("Using For Loop: 0 " + firstFib + " " + secondFib);
            for (int counter = 0; counter < numOfFib-3; counter++ ) {
                nextFib = prevFib + currentFib; // prevFib, currentFib, nextFib
                prevFib = currentFib;
                currentFib = nextFib;
                System.out.print(" " + nextFib);
            }
        }
    }

    public void whileFib(int numOfFib) {
        if (numOfFib == 1) {
            System.out.println("Using While Loop: 0");
        } else if (numOfFib == 2) {
            System.out.println("Using While Loop: 0 " + firstFib);
        //} else if (numOfFib == 2) {
        //    System.out.println("Using While Loop: 0 " + firstFib + " " + secondFib);
        } else if (numOfFib > 2) {
            int prevFib = firstFib;
            int currentFib = secondFib;
            int nextFib;
            System.out.print("Using While Loop: 0 " + firstFib + " " + secondFib);
            int counter = 0;
            while (counter < numOfFib-3) {
                nextFib = prevFib + currentFib; // prevFib, currentFib, nextFib
                prevFib = currentFib;
                currentFib = nextFib;
                System.out.print(" " + nextFib);
                counter++;
            }
        }
    }

    public int recursiveFib(int n) {
        if (n == 0) {
            return 0;
        } else 
        if (n == 1) {
            return firstFib;
        } else if (n == 2) {
            return secondFib;
        } 
        return recursiveFib(n-2) + recursiveFib(n-1);
        
            
        
    }

    public void printRecFib(int numOfFib){
        System.out.print("Using Recursion: ");
        for(int i = 0; i < numOfFib; i++){
			System.out.print(recursiveFib(i) +" ");
		}
    }




    public static void main(String[] args) {

        Scanner scanFib = new Scanner(System.in);
        int numOfFib = scanFib.nextInt();
        Fibonacci fibseries = new Fibonacci();
       
        fibseries.forFib(numOfFib); // For Loop
        System.out.println();
        fibseries.whileFib(numOfFib); // While Loop
        System.out.println();
        fibseries.printRecFib(numOfFib); // Recursive Loop
        
    }
}

Fibonacci.main(null);

Using For Loop: 0 1 1 2 3 5 8 13 21 34
Using While Loop: 0 1 1 2 3 5 8 13 21 34
Using Recursion: 0 1 1 2 3 5 8 13 21 34