BlueJ终端不实时更新值

Question

我在BlueJ编程，我对这些字段有疑问。问题是只有当我关闭终端窗口时，字段值才会实时更新。我想要做的是创造怪物和玩家互相争斗的地方，但当他们相互攻击时，健康等野外值不会降低。

这部分代码来自Player类：

public int damageMonster(Monsters monster) {
    int damage = minDamage + randomGenerator.nextInt(maxDamage-minDamage);
    monster.changeHealth(-damage);
    return damage;
}

这部分代码来自Battleground类：

public void start() {
    boolean finished = false;

    printWelcome();

    while(!finished) {
        String input = reader.getInput().trim().toLowerCase();

        if(input.startsWith("run")) {
            finished = true;
        }
        if(input.startsWith("attack")) {
            System.out.println(player1.getName()+ " and " + randomBeast.getType()+ " enter the arena");            
            System.out.println(player1.getName()+ " deals " + player1.damageMonster(randomBeast) + " damage.");
            System.out.println(randomBeast.getType() + " deals " + randomBeast.damagePlayer(player1) + " damage");
        } else if(input.startsWith("run")) {
            System.out.println(player1.getName() + " left the match and lost 50 gold");
            //player1.getGold()= player1.getGold()-50;
        } else { 
            System.out.println("You need to insert one of the commands mentioned above");
        } 
    }
}