Detailed introduction to Java improvement

In the actual development process, we often use asList to convert arrays to Lists. This method is very convenient to use, but the asList method has several flaws: 1. Avoid using basic data type arrays to convert to lists. Use 8 basic type arrays. There is an interesting flaw when converting to a list. Let’s first look at the following program: public static void main(String[] args) { int[] ints = {1,2,3,4,5}; List list&nbs

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Introduction: In the actual development process, we often use asList to convert an array into a List. This method is very convenient to use, but the asList method has several flaws:

2. Java Improvement Chapter (35)-----Java Collection Details (1): Please specify the initial capacity for the collection

Introduction: Sets are widely used in Java programming. They are like the sea, embracing all rivers, and like a universal container, holding everything. Moreover, this sea and universal container can be infinitely larger (if conditions permit). When the volume of this sea or container becomes very large, its initial capacity will become very important, because digging and expanding the sea requires a lot of manpower, material and financial resources. In the same way, the initial capacity of Collection is also extremely important. So: For a known scenario, specify an initial capacity for the collection.

3. Java Improvement Chapter (34)-----fail-fast mechanism

Introduction: In the JDK Collection we often see words similar to this:

4. Java Improvement Article (Three three) -----Map summary

##Introduction: LZ introduced HashMap in detail earlier , HashTable, and TreeMap implementation methods are explained from three aspects: data structure, implementation principle, and source code analysis. You should have a clearer understanding of these three classes. Below, LZ makes a simple summary of Map.

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Java Improvement Chapter (32)-----List Summary

Introduction: LZ has already fully introduced most of the knowledge about the List interface, such as ArrayList, LinkedList, Vector, and Stack. Through these knowledge points, we can compare the List interface. Deep understanding. Only knowledge summarized through induction is your knowledge. So below, LZ will make a summary of the List interface. Recommended reading:

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Java Improvement Article (Sanyi)-----Stack

Introduction: The Stack class in Java represents a last-in-first-out (LIFO) object stack. The stack is a very common data structure that uses a typical first-in-last-out operation. Each stack contains a stack top. Each time the stack is popped, the data on the top of the stack is taken out, as follows:

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Java Improvement Chapter (Thirty) --- --Iterator

Introduction: Iteration is definitely not unfamiliar to those of us who work in Java. We often use the iteration interface provided by JDK to iterate Java collections.

8. Java Improvement Chapter (29)-----Vector

Introduction: In the java improvement chapter (21) - ArrayList, java improvement chapter (22) - LinkedList, the principles and implementation processes of ArrayList and linkedList are explained in detail. For the List interface, here is also an introduction to its implementation. Class Vector, the Vector class can implement a growable array of objects.

9. Java Improvement Chapter (28)------TreeSet

Introduction: Just like HashSet is implemented based on HashMap, TreeSet is also implemented based on TreeMap. In "Java Improvement Chapter (27) -----TreeMap", LZ explained the TreeMap implementation mechanism in detail. If you have read this blog post in detail or have a more detailed understanding of TreeMap, then the implementation of TreeSet will be useful to you. It's as simple as drinking water.

10. Java Improvement Chapter (27)-----TreeMap

Introduction: The implementation of TreeMap is the implementation of the red-black tree algorithm, so to understand TreeMap you must have a certain understanding of the red-black tree. In fact, the name of this blog post is: According to the red-black tree Algorithm to analyze the implementation of TreeMap, but in order to be consistent with the Java improvement series of blog posts, it is better to call it TreeMap. Through this blog post you can get the following knowledge points:

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