src/step3/CatAndDog.java:7: error: '(' or '[' expected Animal a[0] = new Cat;
时间: 2024-06-01 16:12:44 浏览: 10
There is a syntax error in the statement. The correct syntax should be:
Animal[] a = new Animal[2];
a[0] = new Cat();
a[1] = new Dog();
This creates an array of Animal objects and assigns a new Cat object to the first element and a new Dog object to the second element.
相关问题
0/1 src/step3/CatAndDog.java:7: error: '(' or '[' expected a[0] = new Cat;
This error message indicates a syntax error in the code. The compiler expected a '(' or '[' symbol but found something else instead. In this case, the error is caused by a missing opening bracket for the array declaration. The correct syntax should be:
Cat[] a = new Cat[2];
a[0] = new Cat();
public class CatAndDog { public static void main(String[] args) { /********** Begin *********/ Animal ; Animal ; /********** End *********/ cat.eat(); cat.work(); dog.eat(); dog.work(); } } abstract class Animal { abstract void eat(); abstract void work(); } /********** Begin *********/ class Cat extends Animal { } class Dog extends Animal { } /********** End *********/
在代码中需要添加的部分是:
```
Cat cat = new Cat();
Dog dog = new Dog();
```
这样就可以创建一个猫和一个狗的实例,然后调用它们的方法了。需要注意的是,Cat和Dog都是Animal的子类,因此它们必须实现Animal中声明的抽象方法eat()和work()。在这个例子中,由于我们没有在Cat和Dog中实现这些方法,所以程序会编译时报错。
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