Detailed introduction to java collections

The following editor will bring you a summary and detailed comparison of several methods of Java collection traversal. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor to take a look at the general traversal method of collection classes, using iterators to iterate: Iterator it = list.iterator(); while(it.hasNext()) { Object obj = it.next(); }Map traversal method: 1. Traverse by getting all keys //Set set = map.keySet(); //Get the set of all keys for (Integer in : map.keySet()) { String str&a

1. 10 recommended articles about next()

Introduction: The following editor will bring you a summary and detailed comparison of several methods of java collection traversal. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor to take a look at the general traversal method of collection classes, using iterators to iterate: Iterator it = list.iterator();while(it.hasNext()) { Object obj =  ;it.ne...

2. 10 recommended articles about traversal methods

Introduction: The following editor will bring you a summary and detailed comparison of several methods of java collection traversal. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor to take a look at the general traversal method of collection classes, using iterators to iterate: Iterator it = list.iterator();while(it.hasNext()) { Object obj =  ;it.ne...

3. 10 recommended articles about detailed explanations of algorithms

Introduction: java collection (1) - Detailed explanation of data structure: http://www.php.cn/java-article-354226.html A framework refers to a set of classes. There are many superclasses and interfaces in the collection, and many advanced mechanisms, functions and strategies are implemented in these superclasses. Users of the framework can create subclasses to implement and extend superclasses without recreating these basic mechanisms. In daily work, the technologies we use are basically frameworks. When we use those packages and call those functions, we will use the idea of ​​​​this framework. Analyzing in Collection (1)...

4. About java generic Public instance usage summary

Introduction: Introduction Generics are a very important knowledge point in Java. Generics are widely used in the Java collection class framework. In this article, we will look at the design of Java generics from scratch, which will involve wildcard processing and annoying type erasure. Generic basics Generic classes We first define a simple Box class: public class Box {    private&n...

##5. Recommended 10 articles about erasure

Introduction: Introduction Generics are a very important aspect in Java Knowledge points, generics are widely used in the Java collection class framework. In this article, we will look at the design of Java generics from scratch, which will involve wildcard processing and annoying type erasure. Generic basics Generic classes We first define a simple Box class: public class Box {    private&n...

6.

About generic article summary

Introduction: Generics are a very important knowledge point in Java. Generics are widely used in the Java collection class framework. In this article, we will look at the design of Java generics from scratch, which will involve wildcard processing and annoying type erasure. Generic basics Generic classes We first define a simple Box class: public class Box {    private&n...

##7. Detailed introduction to collection classes

Introduction: Generics are a very important knowledge point in Java. Generics are widely used in the Java collection class framework. In this article, we will look at the Java generic Automobile class from scratch: public class Automobile {    private String name;    public&

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