Doubt about a simple game of stone paper scissors lizard spock!

From a static array where I have {stone, paper, scissors, lizard, spock} I'm interested in the computer taking one randomly. How would you do?

import java.util.Scanner;


public class Principal {

    public static void main(String[] args) {
        while (true) {
            menuprin();
        }

    }

    private static int scanner() {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        return sc.nextInt();
    }

    private static void menuprin() {
        System.out.println(
                "PIEDRA PAPEL TIJERAS LAGARTO SPOCK\r\n" + "1. Jugar\r\n" + "0. Salir\r\n" + "Escoja una opción:");
        int opcion = scanner();
        switch (opcion) {
        case 0:
            System.exit(0);
            break;
        case 1:
            jugar();
            break;
        default:
            System.out.println("No es una opción válida.");
            break;
        }
    }

    private static void jugar() {
        System.out.println("Escriba su jugada piedra, papel, tijeras,lagarto, Spock:");
        String cosa = scannercosa();


    }

    private static String scannercosa() {
        Scanner sc = new Scanner(System.in);
        return sc.nextLine();
    }

}