Question

不确定为什么，但我在第一个花括号上遇到语法错误，它说我需要在声明第一个变量后添加一个右括号。

public class DogNeeds extends PetNeeds {
    super.setAnimalType("dog"); //This method is inherited from PetNeeds superclass
    protected boolean walk;

    public DogNeeds(String name) {
        super(name);
        // TODO Auto-generated constructor stub
    }   

    boolean getWalk() {
        return walk;
    }

    void setWalk(boolean walk) {
        this.walk = walk;
    }

    public void walkDog() {
        if(walk) {
            System.out.println("Time to walk " + super.getName());
        }
        else {
            System.out.println(super.getName() + " doesn't need to go out yet.");
        }
    }   
}

Answer 1

这一行：

super.setAnimalType("dog"); //This method is inherited from PetNeeds superclass

必须位于方法或构造函数中。

Answer 2

super.setAnimalType("dog")不能在方法之外。您可以将其添加到任何方法或重写方法。例如：

public class DogNeeds extends PetNeeds {

  protected boolean walk;

  public DogNeeds(String name) {
    super(name);
    // TODO Auto-generated constructor stub
  }

  void setAnimalType(String animal) {
     super.setAnimalType(animal);
  }

  boolean getWalk() {
    return walk;
  }

 void setWalk(boolean walk) {
    this.walk = walk;
 }

 public void walkDog() {
    if(walk) {
       System.out.println("Time to walk " + super.getName());
    }
    else {
       System.out.println(super.getName() + " doesn't need to go out 
       yet.");
    }
  }
}

Answer 3

super.setAnimalType("dog"); 当你调用这样的方法时，它应该进入你自己的方法。由于它不是任何类型的声明，因此应该在函数/方法中的某处执行。

P.S。我今天早上犯了一个类似的错误，愚蠢的我。

不知道为什么我会收到此语法错误

3 个答案: