Question

我正在尝试创建一个口袋妖怪之间的大型战斗的模拟。为了提供一个例子，我将使用两个Pokemon，名为pokemon1和pokemon2。我希望程序像以下一样工作：

pokemon1和pokemon2将根据他们的combatScore进行比较，这是一个基于他们的基本属性的分数，如速度，攻击，防御等。
pokemon1和pokemon2将随机配对并进行比较。
如果pokemon1的战斗力比pokemon2高，那么pokemon1会进入下一轮（并从一般人群中移除并被置于“胜利”人群中），pokemon2将从一般人群中删除并添加到“被征服的“人口。
pokemon1然后根据pokemon2的特征获得一些属性。
如果pokemon2（被击败）具有传奇色彩，他们必须总共失去三次才能最终加入被征服的人口。
如果pokemon1（胜利）不具有传奇色彩，但已赢了三次，那么它就会变得具有传奇色彩，因此在被加入被征服的人群之前必须失去三次。

在没有越来越少的胜利人口的情况下重复这些轮次，直到只剩下一名胜利者为止。

我创建了一个do-while循环，它将从群体中随机检索两个Pokemon，并使用if-else分支根据许多不同的条件对它们进行比较：

传奇的pokemon2击败传奇的pokemon1
pokemon2 beats legendary pokemon1
传奇pokemon2 beats pokemon1
pokemon2 beats pokemon1

反之亦然。我遇到的问题是：大多数时候，程序运行干净，第1轮完成。所有的战斗都写在一个pokemon.txt文件中，明确说明谁赢了。但是，有时程序将开始运行并保持运行状态。当我去检查.txt文件时，它将停止在同一位置（第275行）周围写句子。

现在，我只想进行第一轮比赛。以下是运行此模拟器的代码：

  do {
        Pokemon pokemon1;
        Pokemon pokemon2;
        pokemon1 = population.get((int) (Math.random() * population.size()));
        do {
            pokemon2 = population.get((int) (Math.random() * population.size()));
        } while (pokemon1.getId() == pokemon2.getId());


        if (pokemon2.getCombatScore() > pokemon1.getCombatScore()
                && pokemon2.isLegendary() && pokemon1.isLegendary()) {
            bufferedWriter.write("The legendary " + pokemon2.getName() + " defeats the legendary " +
                    pokemon1.getName() + " with a combat score of " + pokemon2.getCombatScore() + "!");
            bufferedWriter.newLine();

            /* pokemon2 gains xp from winning */
            pokemon2.incAttack(pokemon1.getCombatScore());
            pokemon2.incDefense(pokemon1.getCombatScore());
            pokemon2.addVict();

            victorious.add(pokemon2);
            population.remove(pokemon2);

            pokemon1.addLoss();

            if (pokemon1.numLoss == 3) {
                defeated.add(pokemon1);
                population.remove(pokemon1);
            }
        }

        else if (pokemon2.getCombatScore() > pokemon1.getCombatScore()
                && pokemon1.isLegendary()) {
            bufferedWriter.write(pokemon2.getName() + " defeats the legendary " +
                    pokemon1.getName() + " with a combat score of " + pokemon2.getCombatScore() + "!");
            bufferedWriter.newLine();

            /* pokemon2 gains xp from winning */
            pokemon2.incAttack(pokemon1.getCombatScore());
            pokemon2.incDefense(pokemon1.getCombatScore());

            pokemon2.addVict();
            if (pokemon2.numVict == 3) {
                bufferedWriter.write(pokemon2.getName() + " has become legendary!");
            }

            victorious.add(pokemon2);
            population.remove(pokemon2);

            pokemon1.addLoss();
            if (pokemon1.numLoss == 3) {
                defeated.add(pokemon1);
                population.remove(pokemon1);
            }
        }

        else if (pokemon2.getCombatScore() > pokemon1.getCombatScore()
                && pokemon2.isLegendary()) {
            bufferedWriter.write("The legendary " + pokemon2.getName() + " defeats " +
                    pokemon1.getName() + " with a combat score of " + pokemon2.getCombatScore() + "!");
            bufferedWriter.newLine();

            /* pokemon2 gains xp from winning */
            pokemon2.incAttack(pokemon1.getCombatScore());
            pokemon2.incDefense(pokemon1.getCombatScore());
            pokemon2.addVict();

            victorious.add(pokemon2);
            population.remove(pokemon2);

            pokemon1.addLoss();

            defeated.add(pokemon1);
            population.remove(pokemon1);
        }
        else if (pokemon2.getCombatScore() > pokemon1.getCombatScore()) {
            bufferedWriter.write(pokemon2.getName() + " defeats " +
                    pokemon1.getName() + " with a combat score of " + pokemon2.getCombatScore() + "!");
            bufferedWriter.newLine();

            /* pokemon2 gains xp from winning */
            pokemon2.incAttack(pokemon1.getCombatScore());
            pokemon2.incDefense(pokemon1.getCombatScore());

            pokemon2.addVict();
            if (pokemon2.numVict == 3) {
                bufferedWriter.write(pokemon2.getName() + " has become legendary!");
            }

            victorious.add(pokemon2);
            population.remove(pokemon2);

            pokemon1.addLoss();

            defeated.add(pokemon1);
            population.remove(pokemon1);
        }
        else if (pokemon1.getCombatScore() > pokemon2.getCombatScore()
                && pokemon2.isLegendary() && pokemon1.isLegendary()) {
            bufferedWriter.write("The legendary " + pokemon1.getName() + " defeats the legendary " +
                    pokemon2.getName() + " with a combat score of " + pokemon1.getCombatScore() + "!");
            bufferedWriter.newLine();

            /* pokemon2 gains xp from winning */
            pokemon1.incAttack(pokemon2.getCombatScore());
            pokemon1.incDefense(pokemon2.getCombatScore());
            pokemon1.addVict();

            victorious.add(pokemon1);
            population.remove(pokemon1);

            pokemon2.addLoss();

            if (pokemon2.numLoss == 3) {
                defeated.add(pokemon2);
                population.remove(pokemon2);
            }
        }

        else if (pokemon1.getCombatScore() > pokemon2.getCombatScore()
                && pokemon2.isLegendary()) {
            bufferedWriter.write(pokemon1.getName() + " defeats the legendary " +
                    pokemon2.getName() + " with a combat score of " + pokemon1.getCombatScore() + "!");
            bufferedWriter.newLine();

            /* pokemon2 gains xp from winning */
            pokemon1.incAttack(pokemon2.getCombatScore());
            pokemon1.incDefense(pokemon2.getCombatScore());

            pokemon1.addVict();
            if (pokemon1.numVict == 3) {
                bufferedWriter.write(pokemon1.getName() + " has become legendary!");
            }

            victorious.add(pokemon1);
            population.remove(pokemon1);

            pokemon2.addLoss();
            if (pokemon2.numLoss == 3) {
                defeated.add(pokemon2);
                population.remove(pokemon2);
            }
        }

        else if (pokemon1.getCombatScore() > pokemon2.getCombatScore()
                && pokemon1.isLegendary()) {
            bufferedWriter.write("The legendary " + pokemon1.getName() + " defeats " +
                    pokemon2.getName() + " with a combat score of " + pokemon1.getCombatScore() + "!");
            bufferedWriter.newLine();

            /* pokemon2 gains xp from winning */
            pokemon1.incAttack(pokemon2.getCombatScore());
            pokemon1.incDefense(pokemon2.getCombatScore());
            pokemon1.addVict();

            victorious.add(pokemon1);
            population.remove(pokemon1);

            pokemon2.addLoss();

            defeated.add(pokemon2);
            population.remove(pokemon2);
        }
        else {
            bufferedWriter.write(pokemon1.getName() + " defeats " +
                    pokemon2.getName() + " with a combat score of " + pokemon1.getCombatScore() + "!");
            bufferedWriter.newLine();

            /* pokemon2 gains xp from winning */
            pokemon1.incAttack(pokemon2.getCombatScore());
            pokemon1.incDefense(pokemon2.getCombatScore());

            pokemon1.addVict();
            if (pokemon1.numVict == 3) {
                bufferedWriter.write(pokemon1.getName() + " has become legendary!");
            }

            victorious.add(pokemon1);
            population.remove(pokemon1);

            pokemon2.addLoss();

            defeated.add(pokemon2);
            population.remove(pokemon2);
        }

    }while (population.size() != 0);

以下是.txt文件“永远”运行时的示例屏幕截图：

272 Stoutland defeats Loudred with a combat score of 5415!
273 Croconaw defeats Electrike with a combat score of 3272!
274 Rapidash defeats Meditite with a combat score of 7390!
275 Jynx defeat

我已经尝试调试并逐步完成每个条件以确保它们正常工作。我很有信心他们都这样做。问题出在其他地方吗？当人口中存在奇怪数量的口袋妖怪时，它是否会遇到问题？任何建议将不胜感激。

Answer 1

问题在于，当为战斗选择两个竞争者时，你进入一个永不退出的循环：

pokemon1 = population.get((int) (Math.random() * population.size()));
do {
    pokemon2 = population.get((int) (Math.random() * population.size()));
} while (pokemon1.getId() == pokemon2.getId());

这看起来很好，但是如果人口只有一个口袋妖怪会怎么样？它永远不会选择第二个并且永远不会退出循环。

至于为什么它停止写中句，你正在使用缓冲的编写器，它不一定立即将它的内容刷新到文件中。当你陷入循环时，编写器正在等待更多信息写入，并将其余部分保留在缓冲区中。对flush（）的调用可以帮助你解决这个问题，但确保有足够的口袋妖怪进行战斗是一个更大的问题。

运行程序时偶尔突然停止

1 个答案: