Shulou(Shulou.com)06/03 Report--

This article introduces the relevant knowledge of "Java generic knowledge points". In the actual case operation process, many people will encounter such difficulties. Next, let Xiaobian lead you to learn how to deal with these situations! I hope you can read carefully and learn something!

What is a generic?

Java generics, a new feature introduced in JDK 5, provides compile-time type-safety detection that allows programmers to detect illegal types at compile time.

Generics specify compile-time types, reducing run-time exceptions caused by object type mismatches. Its main purpose is to increase the reuse rate of our code.

ArrayList in our Java standard library is a typical application of generics:

public class ArrayList extends AbstractList implements List, RandomAccess, Cloneable, java.io.Serializable { ...... public ArrayList(Collection

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