java如何通过继承访问字符串的值？

Question

import java.util.*;

class Pilot
{
   protected String PILOT = "BSIT-1A";
   public static void Subject()
   {
      String[] subs = {"Comprog11","WebDev","Digilog12","ComProg12"};
   }
   public static void Teacher()
   {
     String[] teach = {"Ms.a","Ms.b","Ms.c","Ms.d"};
   }
}
class Pilot1 extends Pilot
{
   protected String PILOT1 = "BSIT-1B";
      public static void main(String[]args)
      { 
         Pilot1 obj = new Pilot1();

        System.out.println(obj.PILOT);
        System.out.println(obj.PILOT1);
        obj.Subject();
        obj.Teacher();
      }

如果在主题（）和教师（）中放入字符串，如何显示它们的值？它没有任何编译器问题，但当我运行它时，它只显示

BSIT-1A

BSIT-1B

我的预期产出是

BSIT-1A
BSIT-1B
Comprog11
Webdev
Digilog12
Comprog12
Ms.a
Ms.b
Ms.c
Ms.d

Answer 1

您需要打印Subject()和Teacher()中的值，或者让它们返回值。另外，通过对象调用static方法也不是一个好方法 良好做法。它们应该由类调用，比如Pilot1.Subject()

class Pilot
{
    protected String PILOT = "BSIT-1A";
    public static void Subject()
    {
        String[] subs = {"Comprog11","WebDev","Digilog12","ComProg12"};
        for(String sub : subs){
            System.out.println(sub);
        }
    }
    public static void Teacher()
    {
        String[] teach = {"Ms.a","Ms.b","Ms.c","Ms.d"};
        for(String t : teach){
            System.out.println(t);
        }
    }
}

Answer 2

你可以返回数组

 public String[] subject() {
  return {"Comprog11","WebDev","Digilog12","ComProg12"};
 }

然后移除继承。主要方法不需要它。例如，将引导常量设置为公共的，或者将这些字符串传递给类构造函数，并使用getter方法添加一个私有字段

    Pilot a = new Pilot("BSIT-1A");
    Pilot b = new Pilot("BSIT-1B");
    System.out.println(a.getCode());
    System.out.println(b.getCode());
    Arrays.stream(a.subject()).forEach(System.out::println);