In-depth interpretation of the ‘core sharing’ framework technical principle in the Java library
In -depth interpretation of the technical principles of the "core sharing" framework in the Java library
Abstract: The Java class library is an indispensable part of the development of Java, and the "core sharing" framework technology among them plays an important role in the design and implementation of the Java library.This article will explore the technical principles of the 'core sharing' framework in the Java class library and provide relevant Java code examples.
introduction:
The Java class library is a set of predetermined classes and interfaces, which provides tools and functions for the development of Java applications.The 'core sharing' framework technology in the Java class library refers to the core functions and resources shared in the Java class library to improve development efficiency, code reusability and system performance.These core functions and resources include commonly used data structures, algorithms, input and output processing, network communication, etc.
‘Core Sharing’ Framework Technical Principles:
The implementation principles and design patterns of the "core sharing" framework technology is based on the Java class library.Among them, the important principles and technologies are as follows:
1. Singleton Pattern: In the Java class library, many components need only one instance to meet the needs, such as log recorders, database connection pools, etc.By using a singles mode, there is only one instance in the entire application to avoid waste and conflict of resources.
The following is an example of Java code of a singles mode:
public class Singleton {
private static Singleton instance;
private Singleton() {
// Private structure function
}
public static Singleton getInstance() {
if (instance == null) {
synchronized (Singleton.class) {
if (instance == null) {
instance = new Singleton();
}
}
}
return instance;
}
}
2. Factory Pattern: In the Java class library, the factory model is often used to create object instances to hide specific details and provide flexibility.Through the creation process of the packaging object, the factory mode allows the use of high -level abstraction in the code without paying attention to specific implementation.
The following is an example of a factory model Java code:
public interface Shape {
void draw();
}
public class Circle implements Shape {
@Override
public void draw() {
System.out.println ("Draw a circular");
}
}
public class Square implements Shape {
@Override
public void draw() {
System.out.println ("Draw a square");
}
}
public class ShapeFactory {
public Shape createShape(String shapeType) {
if (shapeType == null) {
return null;
}
if (shapeType.equalsIgnoreCase("CIRCLE")) {
return new Circle();
} else if (shapeType.equalsIgnoreCase("SQUARE")) {
return new Square();
}
return null;
}
}
3. Template Method Pattern: In the Java library, the template method mode can be used to define the skeleton of the algorithm and leave the specific implementation details to the subclass.By putting public processing logic in an abstract class, the template method pattern provides code reuse.
The following is a Java code example of a template method mode:
public abstract class Game {
abstract void initialize();
abstract void startPlay();
abstract void endPlay();
public final void play() {
initialize();
startPlay();
endPlay();
}
}
public class Cricket extends Game {
@Override
void initialize() {
System.out.println ("initialization" of "Cricket Game");
}
@Override
void startPlay() {
System.out.println ("Cricket game start");
}
@Override
void endPlay() {
System.out.println ("Cricket Game End");
}
}
public class Football extends Game {
@Override
void initialize() {
System.out.println ("initialization of game");
}
@Override
void startPlay() {
System.out.println ("Football game");
}
@Override
void endPlay() {
System.out.println ("Football game ends");
}
}
in conclusion:
The "Core Sharing" framework technology is an important part of the Java class library. It provides the use of design principles and design models to provide a key role in development efficiency and code reassessment, and play a key role in system performance.By understanding the principle of the "core sharing" framework technology, developers can better use the Java class library to accelerate the development process of the application.
