what makes a class abstract

If compiler detects an abstract method, the (“host”) class must be declared abstract.

I think this is the only difference between abstract class and non-abstract class.

U can convert a non-abstract class into abstract by adding the keyword “abstract” to the class. All attributes are left alone. Yes, an abstract class can CONTAIN instance-level fields as well as static (ie class-level) members.

发表评论

Fill in your details below or click an icon to log in:

WordPress.com 徽标

您正在使用您的 WordPress.com 账号评论。 登出 /  更改 )

Google photo

您正在使用您的 Google 账号评论。 登出 /  更改 )

Twitter picture

您正在使用您的 Twitter 账号评论。 登出 /  更改 )

Facebook photo

您正在使用您的 Facebook 账号评论。 登出 /  更改 )

Connecting to %s