继承基于文本的游戏的类

发布于 2024-10-18 12:04:35 字数 548 浏览 2 评论 0原文

我正在尝试为课堂创建一个基于文本的游戏，但我一直在尝试让我的主类 GCPUAPP 从我的 Artifact 类中读取内容。

这是我为 GCPUAPP 类输入的代码：

Artifact artifact=new Artifact();
artifact.name="Harry Potter and the Deathly Hallows";
artifact.description="Harry and his friends save the qizarding world again";
r1.contents=artifact;
dialog();

它给了我一个关于“new Artifact”的错误。这是我在 Artifact 上的代码：

public abstract class Artifact{ 

    String name, description;

    public String toString(){
        return name;
}

我是 Java 新手，所以我完全陷入困境。

原文

I'm trying to create a text-based game for class and i'm stuck on trying to get my main class, GCPUAPP, to read from my Artifact class.

Here's the code i've inputed for the GCPUAPP class:

Artifact artifact=new Artifact();
artifact.name="Harry Potter and the Deathly Hallows";
artifact.description="Harry and his friends save the qizarding world again";
r1.contents=artifact;
dialog();

It's giving me an error on "new Artifact". Here's the code I have on Artifact:

public abstract class Artifact{ 

    String name, description;

    public String toString(){
        return name;
}

I'm new to Java so I am completely stuck.

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遗忘曾经 2024-10-25 12:04:35

您无法创建抽象类的实例 Artifact artifact=new Artifact();

这就是抽象类的要点。只有继承抽象类的非抽象类才能实例化为对象。

从类定义中删除 abstract 表示法，或者创建另一个继承 Artifact 的类并调用构造函数，如下 Artifact artifact=new MyNewArtifact();

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盗梦空间 2024-10-25 12:04:35

您无法创建抽象变量的实例。因此，AbstractClass ac=new AbstractClass() 将引发编译时错误。
相反，您需要另一个类来从抽象类继承。
例如：

public abstract class AbstractClassArtifact{ 

    String name, description;

    public String toString(){
        return name;
}

然后使用：

 public class Artifact extends AbstractClassArtifact{
   public Artifact(String name, String description){ //Constructor to make setting variables easier
     this.name=name;
     this.description=description;
   }
 }

最后创建：

 Artifact artifact=new Artifact("Harry Potter and the Deathly Hallows", "Harry and his friends save the qizarding world again");
 r1.contents=artifact.toString();
 dialog();

You can't create an instance of an abstract variable. So, AbstractClass ac=new AbstractClass() would throw a compile-time error.
Instead, you need another class to inherit from the abstract class.
For example:

public abstract class AbstractClassArtifact{ 

    String name, description;

    public String toString(){
        return name;
}

Then use:

 public class Artifact extends AbstractClassArtifact{
   public Artifact(String name, String description){ //Constructor to make setting variables easier
     this.name=name;
     this.description=description;
   }
 }

Finally create with:

 Artifact artifact=new Artifact("Harry Potter and the Deathly Hallows", "Harry and his friends save the qizarding world again");
 r1.contents=artifact.toString();
 dialog();

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终陌 2024-10-25 12:04:35

我会这样做

class HarryPotterArtifact extends Artifact {

    // no need to declare name and desc, they're inherited by "extends Artifact"

    public HarrayPotterArtifact(String name, String desc) {
         this.name = name;
         this.desc = desc;
    }
}

像这样使用它：

//Artifact artifact=new Artifact();
//artifact.name="Harry Potter and the Deathly Hallows";
//artifact.description="Harry and his friends save the qizarding world again";

  String harryName = "Harry Potter and the Deathly Hallows";
  String harryDesc = "Harry and his friends save the qizarding world again";
  Artifact artifact = new HarryPotterArtifact(harryName,harryDesc);

I'd do this

class HarryPotterArtifact extends Artifact {

    // no need to declare name and desc, they're inherited by "extends Artifact"

    public HarrayPotterArtifact(String name, String desc) {
         this.name = name;
         this.desc = desc;
    }
}

Use it like this:

//Artifact artifact=new Artifact();
//artifact.name="Harry Potter and the Deathly Hallows";
//artifact.description="Harry and his friends save the qizarding world again";

  String harryName = "Harry Potter and the Deathly Hallows";
  String harryDesc = "Harry and his friends save the qizarding world again";
  Artifact artifact = new HarryPotterArtifact(harryName,harryDesc);

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