java - 使用一个参数搜索数组 - Java

Question

我有一个类沙鼠，我创建了一个它的实例数组，并在主方法中进行了正确的初始化。现在我想要一个搜索函数，它只需要一个参数(基本上是搜索字符串)。如何在搜索函数中传递沙鼠数组而不将其作为参数传递。

public class Gerbil {
    String lab_id;
    String name;
    boolean isBite;
    public int[] eat;

    public Gerbil(int x) {
        eat = new int[x];
    }

    public String getLab_id() {
        return lab_id;
    }

    public void setLab_id(String lab_id) {
        this.lab_id = lab_id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public boolean isBite() {
        return isBite;
    }

    public void setBite(boolean isBite) {
        this.isBite = isBite;
    }

    public void setEat(int a, int b) {
        eat[a]=b;
    }

    public int getEat(int a){
        return eat[a];
    }

在main方法中声明gerbil类数组

Gerbil[] gerbils = new Gerbil[gerbil_no];

// initializing the Food class into the Gerbil Class

for (int x = 0; x < gerbils.length; x++) {
    gerbils[x] = new Gerbil(types);
}

Answer 1

使用此代码在类范围内声明数组(在所有函数之外):

private static Gerbil[] gerbils;

现在，用主函数中的大小对其进行初始化:

gerbils = new Gerbil[gerbil_no];

所以，最后，你的类可能如下所示:

public class Gerbil 
{
    private static Gerbil[] gerbils;

    public static void main(String[] args) {

        // write code here to read the array size into gerbil_no

        // then initialize your array with size here
        gerbils =  = new Gerbil[gerbil_no];

        for (int x = 0; x < gerbils.length; x++) {
            gerbils[x] = new Gerbil(types);
        }
        // continue with your code
    }
}

注意:在Java中，静态函数只能访问静态成员。由于 main 函数(在 Java 中)是静态的，因此您必须将数组声明为静态。您可以在这里阅读更多相关信息:http://www.javatpoint.com/static-keyword-in-java