Programmer Group

⭐ ♪ previous words ⭐ ️ This article introduces you to the basic knowledge of Java - composition, polymorphism and interface, friends, long time no see, question A left to readers in the previous blog post package and inheritance. This article will introduce polymorphism and interfaces in detail. The inheritance introduced last time is the ba ...

The difference between abstract classes and interfaces The difference between abstract class and practical application of interface The conceptual differences between abstract classes and interfaces are familiar, such as whether there can be differences in constructor, access modifier, multiple inheritance and so on. In addition to concept ...