Stone Paper Scissor game in Java

import java.util.Random;
import java.util.Scanner;

public class Game
{
    private static int userWinningCount, computerWinningCount;
    private int userInput, computerInput;
    public void setUserInput(int userInput)
    {
        this.userInput = userInput;
    }
    public void setComputerInput()
    {
        Random r = new Random();
        computerInput = r.nextInt(3-1+1)+1;// corresponding to r.nextInt(max-min+1)+min;
    }
    public String computerChoice()
    {
        if(computerInput == 1)
            return "Stone";
        else if(computerInput == 2)
            return "Paper";
        else
            return "Scissor";
    }
    public String getResult()
    {
        if(userInput == computerInput)
            return "Tie ";
        else if(userInput == 1 && computerInput == 2)// stone = 1, paper = 2, scissor = 3;
            return "Computer won";
        else if(userInput == 1 && computerInput == 3)
            return "You won";
        else if(userInput == 2 && computerInput == 1)
            return "You won";
        else if(userInput == 2 && computerInput == 3)
            return "Computer won";
        else if(userInput == 3 && computerInput == 1)
            return "Computer won";
        return "You won";// i.e. user has scissor and computer has paper.
    }
    public static void main(String []args)
    {
        String s = "yes";
        Game obj = new Game();
        Scanner input = new Scanner(System.in);
        while(s.equalsIgnoreCase("yes"))
        {
            System.out.println("Ener your choice (Stone, Paper, Scissor)");
            String choice = input.next();
            choice = choice.toLowerCase();
            if(choice.equals("stone"))
                obj.setUserInput(1);
            else if(choice.equals("paper"))
                obj.setUserInput(2);
            else if(choice.equals("scissor"))
                obj.setUserInput(3);
            else
                System.out.println("Enter valid option");
            obj.setComputerInput();
            System.out.println("The computer chose : "+obj.computerChoice());
            if(obj.getResult().equals("You won"))
                userWinningCount++;
            else if(obj.getResult().equals("Computer won"))
                computerWinningCount++;
            System.out.println(obj.getResult());
            System.out.print("Your winning count = "+userWinningCount);
            System.out.print(" and Computer winning count = "+computerWinningCount);
            System.out.println("\n Wanna continue playing game ? (enter yes) ");
            s = input.next();
        }
        input.close();
    }
}