The best practice of using Jakartaee API to build a high-performance Java class library
Use Jakartaee API to build the best practice of high -performance Java class library
Overview:
With the development of the Java language, building a high -performance Java class library has become one of the important tasks of developers.Using Jakartaee API can help us build powerful and efficient Java class libraries.This article will introduce some of the best practices to build a high -performance Java class library using Jakartaee API, and provide corresponding Java code examples.
1. Use the appropriate data structure:
Choosing an appropriate data structure is essential for building a high -performance Java library.For example, the use of linked lists instead of array may be better for the scenario where the insertion and deletion operations need to be performed efficiently.As for the scene that needs to be quickly found, it may be more appropriate to use the scattered list or tree structure.Understand the characteristics and use scenarios of the data structure, and choose the appropriate data structure, which can significantly improve the performance of the Java library.
Example:
import java.util.LinkedList;
public class MyLibrary {
private LinkedList<String> myList;
public MyLibrary() {
myList = new LinkedList<>();
}
public void addElement(String element) {
myList.add(element);
}
public void removeElement(String element) {
myList.remove(element);
}
// other methods...
}
2. Calm repeat calculation results:
In the Java library, we may encounter some scenes that need to be repeatedly calculated.In order to improve performance, we can use the cache mechanism to store the results that have been calculated to avoid repeated calculations.This can reduce unnecessary expenses and return the cache result directly when subsequent calls.
Example:
import java.util.HashMap;
import java.util.Map;
public class MyLibrary {
private Map<String, Integer> calculationCache;
public MyLibrary() {
calculationCache = new HashMap<>();
}
public int performCalculation(String input) {
if (calculationCache.containsKey(input)) {
return calculationCache.get(input);
} else {
int result = // perform calculation based on input
calculationCache.put(input, result);
return result;
}
}
// other methods...
}
3. Avoid the creation and destruction of frequent objects:
When constructing a high -performance Java library, frequent target creation and destruction may bring performance expenses.Therefore, we should reuse the objects as much as possible to avoid unnecessary object creation and destruction operations.For example, the object pool or cache reusable object can significantly improve the performance of the Java class library.
Example:
import java.util.ArrayList;
import java.util.List;
public class MyLibrary {
private static final int MAX_POOL_SIZE = 100;
private List<MyObject> objectPool;
public MyLibrary() {
objectPool = new ArrayList<>();
for (int i = 0; i < MAX_POOL_SIZE; i++) {
objectPool.add(new MyObject());
}
}
public MyObject getObjectFromPool() {
if (objectPool.isEmpty()) {
return new MyObject();
} else {
return objectPool.remove(0);
}
}
public void returnObjectToPool(MyObject object) {
if (objectPool.size() < MAX_POOL_SIZE) {
objectPool.add(object);
}
}
// other methods...
}
4. Reasonable use of multi -thread:
In the JAVA library that seeks high -performance, reasonable use of multi -threading can enable the code to execute parallel, thereby improving the overall performance.However, multi -threaded programming also needs to deal with it carefully to avoid concurrent related problems.It is very important to use the appropriate synchronization mechanism and thread security data structure.
Example:
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class MyLibrary {
private ExecutorService executorService;
public MyLibrary() {
executorService = Executors.newFixedThreadPool(10);
}
public void performTasksInParallel() {
for (int i = 0; i < 10; i++) {
executorService.execute(new Runnable() {
@Override
public void run() {
// perform task in parallel
// ensure thread safety if accessing shared resources
}
});
}
}
// other methods...
}
in conclusion:
To build a high -performance Java class library using Jakartaee API, we need to carefully consider performance factors in design and implementation.Selecting appropriate data structure, rational use of cache, reducing object creation and destruction, reasonable use of multi -threading can help us build high -performance, efficient Java libraries.
These best practices are related to building high -performance Java libraries using Jakartaee API, but they are not necessarily suitable for all scenes.According to specific needs and actual situations, we should also adjust and optimize according to our own experience and practice.
I hope this article will be helpful to you when building a high -performance Java class library!
