我收到此错误消息:
Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: Pet.saySomething at PetTest.main(PetTest.java:18) Java Result: 1
这是我所拥有的:对于Speak
类,
public class Speak {
public void saySomething();
}
这是我在 PetTest
类中的内容:
import java.util.ArrayList;
public class PetTest {
public static void main(String[] args)
{
ArrayList<Pet> myPets = new ArrayList<Pet>();
myPets.add(new Parrot("Boss"));
myPets.add(new Cat("Oreo"));
myPets.add(new Dog("Riley"));
for (Pet p: myPets)
{
p.saySomething();
System.out.println(p);
}
}
}
我没有发布与该程序相关的其他 5 门类(class)。我知道 Speak
类中需要修复一些问题,但我被困住了。在 Speak
类中,在 public void saySomething();
行中,它表示缺少方法主体,或声明抽象。
编辑:以下是其他类:
public abstract class Pet {
String name;
public Pet(String name){
this.name = name;
}
}
public class Parrot extends Bird {
public Parrot (String name)
{
super(name);
}
@Override
public void saySomething()
{
System.out.println("Pauly want a craker?");
}
@Override
public String toString()
{
return "Hello, I'm " + name + " the parrot.";
}
}
public class Dog extends Pet {
public Dog (String name)
{
super(name);
}
@Override
public void saySomething()
{
System.out.println("Ruff, ruff!");
}
@Override
public String toString()
{
return "Hello, I'm " + name + " the dog.";
}
}
public class Cat extends Pet {
public Cat(String name)
{
super(name);
}
@Override
public void saySomething()
{
System.out.println("Meow.");
}
@Override
public String toString()
{
return "Hello, I'm " + name + " the cat.";
}
}
public class Bird extends Pet {
public Bird(String name)
{
super(name);
}
public void saySomething(){}
}
最佳答案
您有以下发言选项,请选择:
第一
public abstract class Speak{
public abstract void saySomething();
}
第二
public class Speak{
public void saySomething(){
}
}
第三
public interface Speak{
public void saySomething();
}
编辑:首先,您没有在任何地方使用 Speak 类。其次,请在Pet类中添加以下方法:
public abstract void saySomething();
关于java - 缺少方法主体,或声明抽象,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29293427/