java直接使用thread 比runnable优势

Answer 1

According to the description of jdk documentation
The Runnable interface provides an activation method for classes that are not Thread subclasses. By instantiating a Thread instance and using itself as the run target, you can run a class that implements Runnable without creating a subclass of Thread. In most cases, if you only want to override the run method and not other Thread methods, you should use the Runnable interface. Unless you plan to modify or enhance the basic behavior of Thread.
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thread bigger?

Answer 2

One of them is inheritance and the other is interface implementation. Java does not support multiple inheritance, so only interface implementation threads are available.