Detailed explanation of the technical principles of Solong Collections framework in the Java class library
Solong Collections is a collection framework in the Java class library, which provides developers with a set of efficient and convenient set of data structures.This article will introduce the technical principles of the Solong Collections framework in detail and provide some Java code examples.
1 Overview
Solong Collections Framework is expanded and optimized based on the set interface and class in Java.util package in Java. It aims to improve the performance and efficiency of the collection operation.It optimizes the underlying data structure and algorithm, as well as introducing some new data structure and operation methods, so that developers can operate and manage the collection more efficiently.
2. Data structure optimization
Solong Collections framework optimizes the commonly used collection data structure.For example, in ArrayList, it optimizes the speed of element access and traversal, and provides more efficient insertion and deletion operations.In Hashset and TreeSet, it accelerates the search and insert operation by optimizing the hash algorithm and tree structure.
3. New data structure
Solong Collections framework introduces some new data structures to meet specific needs.For example, it provides an improved version of HashSet Linkedhashset, which maintains the order of element insertion, and at the same time provides efficient search operations of HashSet.In addition, it also provides a concurrent security hash table called ConcurrenThashmap, which can support high -concurrency reading and writing operations.
4. Performance optimization
Solong Collections framework optimizes the performance gathered in the concurrent environment by using the data structure and lock mechanism of threads.For example, in multiple threads, it uses a mechanism called segmented locks to reduce the particle size of competition and locks, thereby improving the concurrency performance.
Here are some examples of examples, which show some common functions of the Solong Collection framework:
// Use ArrayList
List<String> list = new ArrayList<>();
list.add("Apple");
list.add("Banana");
list.add("Orange");
for(String item : list){
System.out.println(item);
}
// Use HashSet
Set<Integer> set = new HashSet<>();
set.add(1);
set.add(2);
set.add(3);
System.out.println (set.contains (2)); // Output true
// Use ConcurrenThashmap
Map<String, Integer> map = new ConcurrentHashMap<>();
map.put("Apple", 1);
map.put("Banana", 2);
map.put("Orange", 3);
System.out.println (map.get ("banana"); // Output 2
// Use Linkedhashset
Set<String> linkedSet = new LinkedHashSet<>();
linkedSet.add("Apple");
linkedSet.add("Banana");
linkedSet.add("Orange");
for(String item : linkedSet){
System.out.println(item);
}
By using the Solong Collections framework, developers can operate and manage the collection more efficiently to improve the performance and efficiency of code.It optimizes and expand the original collection class of Java, and at the same time introduces some new data structure and concurrency performance optimization mechanism, making the collection operation more convenient, safe and efficient.
