The bottom implementation principle of thread - static agent mode

Static proxy :

• The names and parameters of real methods and proxy methods are the same , The method body is different ,
• The proxy class and the proxy class establish a relationship by implementing the same interface
• Proxy object （WeddingCompany The object of ） To delegate real objects （You The object of ）

Advantages of static agents ：

• Proxy objects can do a lot of things that real objects can't
• Real objects focus on doing their own things

package creatthread;

public class StaticProxy {
    
    public static void main(String[] args) {
    
        System.out.println(" Static proxy demo ：");
        You person = new You();
        // Go to WeddingCompany Throw one of the constructors to realize Marry The object of 
        WeddingCompany wc = new WeddingCompany(person);
        wc.happyMarry();

        System.out.println();

        System.out.println(" The embodiment of static agent in thread ：");
        // Go to Thread Throw one of the constructors to realize Runnable Object of the interface 
        Thread thread = new Thread(() -> System.out.println("you get married."));
        thread.start();
    }
}

// Public interface 
interface Marry {
    
    void happyMarry();
}

// Surrogate class 
class You implements Marry {
    
    @Override
    public void happyMarry() {
    
        System.out.println("you get married.");
    }
}

// proxy class 
class WeddingCompany implements Marry {
    
	// Real object 
    private Marry person;

    public WeddingCompany(Marry person) {
    
        this.person = person;
    }

 	// Functions that need to be completed by the proxy class itself , Call the method with the object of the proxy class inside the method 
    @Override
    public void happyMarry() {
    
        beforeMarry();
        person.happyMarry();
        afterMarry();
    }

    private void beforeMarry() {
    
        System.out.println(" Set up the venue ");
    }

    private void afterMarry() {
    
        System.out.println(" Remove the venue layout ");
    }
}

result ：