java - 将一个简单的枚举传递给 Java 中的构造函数

Question

我正在努力学习 Java。我想在构造函数中有一个枚举作为参数。但是我收到一个错误。

public class Person {

    private int age, weight, height;
    private String name;

    private enum gender {MALE, FEMALE}

    public Person(int age, int weight, int height, String name, enum gender) {
         this.age    = age;
         this.weight = weight;
         this.height = height;
         this.name   = name;
         this.gender = gender;
    }
}

我将如何处理性别问题？我试过只用性别，但也没有用。

Answer 1

首先，您需要创建类型为gender的字段...

private gender aGender;

然后您需要更改构造函数以引用 gender 类型的对象

public Person(int age, int weight, int height, String name, gender aGender) {

然后您需要将参数分配给您的字段...

this.aGender = aGender;

你gender enum 也应该是public

public enum gender {
    MALE, FEMALE
}

不然就没人用了

例如……

public class Person {

    private int age, weight, height;
    private String name;
    private gender aGender;

    public enum gender {
        MALE, FEMALE
    }

    public Person(int age, int weight, int height, String name, gender aGender) {
                 this.age = age;
        this.weight = weight;
        this.height = height;
        this.name = name;
        this.aGender = aGender;
    }
}

您可能希望阅读 Code Conventions for the Java TM Programming Language ，它会让人们更容易阅读你的代码，也让你更容易阅读别人的代码