Mondai19_3.java

import java.util.Random;
import java.io.*;

class Mondai19_3{
    public static void main(String[] args) throws Exception{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        boolean undone=true;
        Random rand=new Random();
        while(undone){
            int my=0;
            do{
                System.out.print("yours> ");
                my = Integer.parseInt(br.readLine());
            }while(my<1 || 3<my);
            int cmp=rand.nextInt(3)+1;
            System.out.println("cmp's> " + cmp);
            if(my==cmp){
                System.out.println("Draw!");
            }else{
                boolean win=true;
                if(my==1 && cmp==3){
                    win=false;
                }else if(my==2 && cmp==1){
                    win=false;
                }else if(my==3 && cmp==2){
                    win=false;
                }
                if(win){
                    System.out.println("You win!");
                }else{
                    System.out.println("You lose!");
                }
                undone=false;
            }
        }
    }
}