learn java 7 kill that npc

MORE dice fun!

import java.util.Random;




public class diceWars {
    public static void main(String[] args)  {
        Random dice = new Random();
        int playerRoll;
        int npcRoll;
        int npcHealth = 5;
        int playerHealth = 5;
            while (playerHealth > 0) {
                playerRoll =dice.nextInt(20)+1;
                npcRoll =dice.nextInt(20)+1;
                System.out.println("Player rolls a " +playerRoll);
                System.out.println("Npc rolls a " +npcRoll);
        if (playerRoll > npcRoll)  {
            npcHealth = --npcHealth;
            System.out.println("Player scores direct and the enemy has " + npcHealth + " points remaining\n");
        }
            else if (npcRoll > playerRoll) {
                playerHealth = --playerHealth;
                System.out.println("Player takes a hit and has " + playerHealth + " points left!\n");
            }
            else if (playerRoll == npcRoll) {
                System.out.println("Tied, roll again\n");
                  }
          if (playerHealth == 0) { 
              System.out.println("Player has died\n");
              break;  
                   }
          if (npcHealth == 0) {
              System.out.println("congrats, you have defeated the enemy!");
              break;
            }
        }
    }
}