Question

我正在从Java教科书开发一个项目，我遇到了一个问题。我试图在数组中打印变量，但它不断打印变量位置（@hex代码）而不是实际变量...我相信我试图通过使用'for循环'正确打印数组。我在下面附上了我的代码......

import java.util.Scanner;
import java.util.Arrays;
import java.lang.String;

public class Main
{
    public static void main(String[] args)
    {
        int ARRAY_LENGTH = 2;

        Scanner in = new Scanner(System.in);
        Person[] Persons;

        Persons = new Person[ARRAY_LENGTH];

        for (int i = 0; i < ARRAY_LENGTH; i++)
        {
            System.out.println("Enter a name to add to the array: ");
            Persons[i] = new Person(in.next());
        }

        //Arrays.sort(Persons);

        for (int i = 0; i < ARRAY_LENGTH; i++)
        {
            System.out.println(Persons[i]);
        }
    }
}

＆安培;

public class Person implements Comparable<Person>
{
    private String name;

    public Person (String aName)
    {
        String name = aName;
    }

    public String getName()
    {
        return name;
    }

    public int compareTo(Person o)
    {
        Person other = (Person) o;
        if (this.name.equals(o.name))
        {
            return 0;
        }
        if (this.name.compareTo(o.name) < 0)
        {
            return -1;
        }
        return 1;
    }
}

感谢任何和所有指导。谢谢！

Answer 1

您需要在<{1}}课程中覆盖 toString方法。

Person

public class Person implements Comparable<Person> { private String name; public Person (String aName) { ... } public String getName() { ... } public int compareTo(Person o) { ... } @Override public String toString() { return "My name is " + name; // For the example, you could return any String you want } }方法通常用于提供对象的描述。

打印数组变量，而不是变量指针位置

1 个答案: