-Head first design pattern-masters and disciples (1)-object-oriented path

MASTER: Tell me, what have you learned on the object-oriented Road?

Disciples: Master, I learned that the path to object orientation can be "reused 』.

MASTER: continue...

Disciples: Masters, by inheritance, good things can be used again and again, soProgramThe development time will be greatly reduced, as if the bamboo is quickly truncated in the forest.

MASTER: grasshopper! Who needs to spend more time before and after software development is completed?

Disciples: the answer is "", Master. We always need to spend a lot of time on system maintenance and changes, more time than the original development.

MASTER: I am talking about grasshoppers. That's right! So should we focus on improving the maintainability and scalability of reuse?

Disciple: Yes, Master, indeed.