Making my Rock, Paper, Scissors game shorter
You code looks unclear from point of view of parameter usage and ignoring case difference is case of "The result is a tie.", so ...

Try this :).

public class testik {
    // No throws clause here
    public static void main(String[] args) {
        // Paper &lt; Rock &lt; Scissors &lt; Paper
        System.out.println("Comp:S vs User:R = " + determineWinnerOtherWay("S","R")); //user win
        System.out.println("Comp:S vs User:P = " + determineWinnerOtherWay("S","P")); // com win

        System.out.println("Comp:P vs User:R = " + determineWinnerOtherWay("P","R")); //com win
        System.out.println("Comp:P vs User:S = " + determineWinnerOtherWay("P","S")); // user win

        System.out.println("Comp:R vs User:S = " + determineWinnerOtherWay("R","S")); //com win
        System.out.println("Comp:R vs User:P = " + determineWinnerOtherWay("R","P")); // user win
    }

    public static String code2Title(String code){
        if ("R".equals(code)) {
            return "Rock";
        } else if ("P".equals(code)) {
            return "Paper";
        } else {
            return "Scissors";
        }
    }

    public static String determineWinnerOtherWay(String compChoice, String playChoice) {
        String winner = "";
        String playerChoiceN = playChoice.toUpperCase();
        if (playChoice.equals(compChoice))
            winner = "The result is a tie.";
        int diff = compChoice.charAt(0) - playerChoiceN.charAt(0);
        if ( diff == 1 || diff == 2 || diff ==-3) {
            winner = "User win bacause:"+code2Title(playerChoiceN)+" wins " + code2Title(compChoice);
        } else {
            winner = "Computer wins because:"+code2Title(compChoice)+" wins " + code2Title(playerChoiceN);
        }
        return winner;
    }

}