java - Something is off with my code, can't find it -

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for reason code below isn't working properly. structure of code i'm trying make here one-on-one fighting game. pick character 3 different options , battle against computer, picked character. 1 reaches 0 hp loses.

so problem in code computer wins in every scenario. put character3 character, made overpowered (1000 hp, 20 strength compared 120hp , 8 strength), character still losing. i'm guessing problem simple, can't see it/figure out.

thanks in advance.

import java.util.random;  public class test{   public static void main(string[] args){      character character1 = new character("test1", 100, 10);     character character2 = new character("test2", 120, 8);     character character3 = new character("test3", 1000, 20);      character player = character3;     character enemy = character2;      boolean playersturn = true;     while (player.gethp() > 0 || enemy.gethp() > 0){       if (playersturn == true){       enemy.damage(player.getstrength());       } else {       player.damage(enemy.getstrength());       }       playersturn = !playersturn;     }     if (player.gethp() > 0){       system.out.println("player won!");     } else {       system.out.println("enemy won!");     }   } }  class character{    protected string name;   protected int hp;   protected int strength;    public character(string name, int hp, int strength){     this.name = name;     this.hp = hp;     this.strength = strength;   }    public string getname(){     return this.name;   }    public int gethp(){     return this.hp;   }    public int getstrength(){     return this.strength;   }    public void damage(int amount){     int sum = this.hp - amount;     this.hp = sum;   } }

try changing 

while (player.gethp() > 0 || enemy.gethp() > 0){

to 

while (player.gethp() > 0 && enemy.gethp() > 0){

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