英文:
How to print the words using the abstract class?
问题
我想要的结果是...
Baby : crawl
Baby : babble
Dog : bark
Dog : walk on all fours
但上述代码的结果是...
crawl
babble
bark
walk on all fours
我认为 "Baby : " 和 "Dog : " 也在使用抽象类，但我不知道上述代码中的具体代码。
如何修复这段代码？
英文:
The result I want is...
Baby : crawl
Baby : babble
Dog : bark
Dog : walk on all fours
But the result of the above code is...
crawl
babble
bark
walk on all fours
I think "Baby : ", "Dog : " are using the abstract class too, but I don't know what code inside above code.
How can I fix this code?
答案1
得分: 1
需要按照以下方式修改Baby和Dog类中的run()和sound()方法：
run() {
System.out.println(super.getType() + " : " + "用四肢行走");
}
sound() {
System.out.println(super.getType() + " : " + "吠叫");
}
英文:
Need to modify your run() and sound() methods in following way for both Baby and Dog classes:
run() {
System.out.println(super.getType() + " : " + "walk on all fours");
}
sound() {
System.out.println(super.getType() + " : " + "bark");
}
答案2
得分: 0
你只需在所有的打印语句中添加 'type' 即可。
例如：
> System.out.println(super.getType()+"：爬行");
你不能在上述语句中使用 this.type，因为你在两个子类的构造函数中将 type 赋值给了超类变量，而不是子类变量。
英文:
All you have to do is add 'type' in your all print statement
For example:
> System.out.println(super.getType()+": crawl");
You cannot use this.type in the above statement because you have not assigned type to the child class variable but to the superclass variable in constructors of both child classes.
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