Compile and Execute Java Online

public class HelloWorld{

    static class Player{
        String name;
        int hp;
        int atk;
        
        public Player(String name, int hp, int atk){
            this.name = name;
            this.hp = hp;
            this.atk = atk;
        }
        public void attack(Enemy enemy){
            System.out.println("Enemy Attack!");
            enemy.hp -= this.atk;
            System.out.println("Enemy hp :"+enemy.hp);
        }
        public boolean isLive(){
            if(hp <= 0){
                return false;
            }else{
                return true;
            }
        }
    }
    
    static class Enemy{
        String name;
        int hp;
        int atk;
        
        public Enemy(String name, int hp, int atk){
            this.name = name;
            this.hp = hp;
            this.atk = atk;
        }
        public void attack(Player player){
            System.out.println("Player Attack!");
            player.hp -= this.atk;
            System.out.println("Player hp :"+player.hp);
        }
        public boolean isLive(){
            if(hp <= 0){
                return false;
            }else{
                return true;
            }
        }
    }

     public static void main(String []args){
        
        Player player = new Player("gampari", 100, 12);
        Enemy enemy = new Enemy("Orc", 80, 5);
        
        while(player.isLive() && enemy.isLive()){
            player.attack(enemy);
            if(!enemy.isLive()) break;
            enemy.attack(player);
        }
        
        if(player.isLive()){
            System.out.println("player win");
        }else{
            System.out.println("enemy win");
        }
     }
}