从不同的类布尔麻烦 [英] boolean trouble from different class

问题描述

有关我的任务问题，它与签名公众诠释applyNutrientCoefficient（），该计算方法，该方法孔雀鱼在泳池死于营养不良，并返回死亡人数。

For my assignment question it is a method with the signature public int applyNutrientCoefficient(), that calculates which Guppies in the Pool have died of malnutrition, and returns the number of deaths.

使用的的Iterator＆LT;孔雀鱼＆GT; 在池<遍历 guppiesInPool / code>。对于每个顾比生成0.0和1.0包容性的使用随机方法 nextDouble之间不同的随机数（）。如果这个随机生成
数比池的营养系数可，杀死顾比更大
通过在设置适当的布尔领域孔雀鱼。注意，这
方法不从池中删除任何死孔雀鱼，它只是杀死
他们。不要做任何事情。

Use an Iterator<Guppy> to iterate over the guppiesInPool in the Pool. For each Guppy generate a different random number between 0.0 and 1.0 inclusive using the Random method nextDouble(). If this randomly generated number is greater than the Pool's nutrient coeffcient, kill that Guppy by setting the appropriate boolean field in the Guppy. Note that this method does not remove any dead Guppies from the Pool, it just kills them. Do not do anything else.

我有2个班一个是顾比一个是泳池
在我的孔雀鱼类我做了一个布尔 -

I have 2 classes one is Guppy one is Pool in my guppy class I made a boolean -

private boolean isAlive{}
public boolean getIsAlive(){ 
    return isAlive
}

在我的游泳池类....

in my Pool class....

public int applyNutrientCoefficient() 

int deathCount = 0

Iterator<Guppy> it = guppiesInPool.iterator()

while (it.hasNext() ) 

Guppy guppyOne = it.next()

    if (randomNumberGenerator.nextDouble() > nutrientCoefficient) 
    if (guppyOne.isAlive() ) 
    guppyOne.setAlive(false)
    deathCount++

    return deathCount

我收到错误消息是无法找到符号 - 方法的isAlive（）

有人可以帮助请

推荐答案

您似乎语法有点过。它应该是

Your syntax seems kinda off. It should be

private boolean isAlive; //private field, not a method.
public boolean getIsAlive() {  //public getter method.
    return isAlive;
}
public void setIsAlive(boolean isAlive) { //public setter method
    this.isAlive = isAlive;
}

然后，

public int applyNutrientCoefficient() {
    int deathCount = 0;
    Iterator it = guppiesInPool.iterator();
    while (it.hasNext()) {
        Guppy guppyOne = it.next();
        if (randomNumberGenerator.nextDouble() > nutrientCoefficient) {
            if (guppyOne.getIsAlive()) {
                guppyOne.setIsAlive(false);
                deathCount++; // should be inside the if-block i suppose?
            }
        }
    }

    return deathCount;
}

另外，还要确保你使用分号和大括号或编译器会给你的错误。

Also make sure you use semicolons and curly braces or the compiler will give you errors.

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