Java 从另一个类调用数组

Question

我需要帮助解决这个问题，谁能教我如何在 main 方法中从类 ActorAll[] 中打印出 Actor[] 数组？我可以从 Actor() 类进行打印，但由于我不知道的原因，无法从 ActorAll() 进行打印，如果有人可以帮助我，我将不胜感激。

public class Actor {
private String fName;
private String lName;

public Actor(String f,String l){
    setfName(f);
    setlName(l);
}

public String getfName() {
    return fName;
}

public void setfName(String fName) {
    this.fName = fName;
}

public String getlName() {
    return lName;
}

public void setlName(String lName) {
    this.lName = lName;
}
public String displayMessage(){
    return String.format("%s %s", getfName(),getlName());
}

}

public class ActorAll extends Actor{
private Actor[]actor;

public ActorAll(Actor[] actor){
    setActor(actor);
}

public Actor[] getActor() {
    return actor;
}

public void setActor(Actor[] actor) {
    this.actor = actor;
}

public String displayMessage(){
    return String.format("%s ", getActor());
}

}

public class ActorAllTest {

static Scanner sc= new Scanner(System.in);
public static void main(String[] args) {
    Actor actor;

    actor=addContact();
    System.out.println(actor.displayMessage());
}
public static Actor addContact(){
    String fName=sc.next();
    String lName=sc.next();
    Actor actor = new Actor(fName,lName);
    return actor;
}

}

Answer 1

如果你想从ActorAll打印actor[]，你需要创建一个ActorAll动态类型对象并调用displayMessage对象。

public static void main(String[] args) {
    Actor actor = new ActorAll();

    actor=addContact();
    System.out.println(actor.displayMessage());
}