Question

抱歉，我是大学编程的新手。这是我们测试的练习题，并在代码运行器上设置。整个main方法以及所有类，方法，构造函数和变量都已经提供给我了，我必须使显示的类打印出我写的内容。但Bride.getAge()中的Location.getSuburb()和println将无效。我是否需要添加其他内容？

public class Location {

    public static void main(String[] args) {

        Bride person = new Bride("Amy Cronos", 29);
        Location place = new Location("Tonsley", "South Rd");
        Wedding wed = new Wedding(person,place);

        show(wed);
    }

    public static void show(Wedding wed){  
        System.out.println("Wedding data:" );
        System.out.println("Bride: " + wed.getBride() + ", age: " + Bride.getAge);
        System.out.println("Location: " + wed.getPlace() + ", suburb: " + Location.getSuburb());
    }

    private String suburb;
    private String street;

    Location(String suburb, String street){
        this.suburb = suburb;
        this.street = street;
    }

    public String getSuburb(){
          return suburb;
    }

    public String getStreet(){
          return street;
    }

    public class Bride {
        private String name;
        private int age;

        Bride(String name, int age){
            this.name = name;
            this.age = age;
        }

        public String getName(){
            return name;
        }

        public int getAge(){
            return age;
        }
    }

    public class Wedding {
        private Bride person;
        private Location place;

        Wedding(Bride person, Location place){
            this.person = person;
            this.place = place;
        }

        public Bride getPerson(){
            return person;
        }

        public Location getPlace(){
            return place;
        }
    }
}

Answer 1

您需要更正show方法

中的以下行

System.out.println("Bride: " + wed.getBride() + ", age: " + wed.getPerson().getAge());

System.out.println("Location: " + wed.getPlace() + ", suburb: " + wed.getPlace().getSuburb());

由于您使用的方法包含Bride.getAge()和Location.getSuburb()方法，因此这些方法被视为静态方法。因此错误。由于这些不是静态方法，因此您需要使用类的对象来访问它们而不是类名。

Answer 2

你已经通过了类Bride和Location的对象所以你需要获得如下代码的值：尝试使用下面的代码并尝试理解java中的对象，静态是不同的东西。

public static void show(Wedding wed){

System.out.println("Wedding data:" );
System.out.println("Bride: " + wed.getPerson() + ", age: " + wed.getPerson().getAge());
System.out.println("Location: " + wed.getPlace() + ", suburb: " + wed.getPlace().getSuburb());

}

试图让我的show-method工作（非静态方法不能从静态上下文引用）

2 个答案: