Analysis of the technical principles of the "Iron can adjust behavior 'framework in the Java class library
Analysis of the technical principles of the "Iron can adjust behavior 'framework in the Java class library
introduction:
Iron Adjustable Behavior is a common design pattern in the Java library, which aims to provide a flexible and scalable way to allow behaviors that change objects during runtime.This framework relies on object -oriented principles and Java's reflection mechanism, so that objects can switch between different behaviors as needed to achieve more flexible programming.
Technical principle:
The key idea of iron -can adjust the behavior framework is to separate the behavior of the object from the specific implementation of the object, and to achieve this separation through a adjustable behavior interface and a set of different implementation classes.Through this interface, the object can be implemented according to the needs.
The iron -adjustable behavior framework in the Java class library usually uses the following technical principles:
1. Interface definition: First of all, we need to define a adjustable behavior interface that contains the method that the object can call.For example:
public interface AdjustableBehavior {
void performAction();
}
2. Implementation class definition: Then, we create a set of specific implementation classes to implement adjustable behavior interfaces.Each implementation class represents a specific behavior implementation.For example:
public class BehaviorA implements AdjustableBehavior {
@Override
public void performAction() {
System.out.println("Performing Action A");
}
}
public class BehaviorB implements AdjustableBehavior {
@Override
public void performAction() {
System.out.println("Performing Action B");
}
}
3. Object use: In objects that need to be adjusted by iron can adjust the behavior framework, we can create a member variable with adjustable behavior and call a specific behavior through this variable.For example:
public class MyClass {
private AdjustableBehavior behavior;
public void setBehavior(AdjustableBehavior behavior) {
this.behavior = behavior;
}
public void performAction() {
behavior.performAction();
}
}
4. Adjust behavior during runtime: The key to using iron can adjust the behavior framework is to choose specific behaviors to implement during runtime.We can select specific behavior implementation in various ways, such as user input, configuration files or other program logic.For example:
public class Main {
public static void main(String[] args) {
MyClass obj = new MyClass();
// Set as behavior A
obj.setBehavior(new BehaviorA());
obj.perFormAction (); // Output: Performing action a
// Set as behavior B
obj.setBehavior(new BehaviorB());
obj.perFormAction (); // Output: Performing Action B
}
}
Through the choice of behavior during runtime, the iron can adjust the behavior frame of the behavior enables us to change the behavior of the object without modifying the source code.
Summarize:
Iron adjustment behavior is a common design mode in the Java class library. Through adjustable interfaces and different behavior implementation classes, the behavior of the object can be dynamically switched during runtime.Its implementation principle depends on object -oriented and Java's reflection mechanisms.By using iron -can adjust the behavior framework, we can flexibly adjust the behavior of the object without modifying the source code, and improve the reuse and scalability of the code.
