它用于减少对象之间的平直依赖关联手机APP下载登录入口

中介者花式（Mediator Pattern）是一种行径策画花式，它用于减少对象之间的平直依赖关联，通过引入一个中介者对象来配合它们之间的交互。这么不错镌汰系统的耦合度手机APP下载登录入口，使代码愈加易于崇拜和延迟。

以下是一个使用Java讲话终了的中介者花式的肤浅示例：

最初，界说一个中介者接口：

java

public interface Mediator {

void changed(Colleague colleague);

}

然后，界说一个共事类，共事类通过中介者进行通讯：

java

public abstract class Colleague {

protected Mediator mediator;

public Colleague(Mediator mediator) {

this.mediator = mediator;

}

public abstract void send(String message);

public void receive(String message) { www.86ptfe.cn

System.out.println(getName() + " received: " + message);

}

protected abstract String getName();

}

接下来，界说具体的共事类A和B：

java

public class ColleagueA extends Colleague {

public ColleagueA(Mediator mediator) {

super(mediator);

}

@Override

public void send(String message) {

System.out.println(getName() + " sending: " + message);

mediator.changed(this);

}

@Override

protected String getName() {

return "Colleague A";

}

}

public class ColleagueB extends Colleague { www.zrtgjx.com

public ColleagueB(Mediator mediator) {

super(mediator);

}

@Override

public void send(String message) {

System.out.println(getName() + " sending: " + message);

mediator.changed(this);

}

@Override

protected String getName() { www.nmghyba.com

return "Colleague B";

}

}

临了，界说具体的中介者终了类：

java

public class ConcreteMediator implements Mediator {

private ColleagueA colleagueA;

private ColleagueB colleagueB;

public ConcreteMediator() {

colleagueA = new ColleagueA(this);

colleagueB = new ColleagueB(this);

}

@Override

public void changed(Colleague colleague) {

if (colleague == colleagueA) { www.cygzsb.cn

colleagueB.receive("Message from A");

} else if (colleague == colleagueB) {

colleagueA.receive("Message from B");

}

}

public ColleagueA getColleagueA() { www.zhuruilei.cn

return colleagueA;

}

public ColleagueB getColleagueB() {

return colleagueB;

}

}

咫尺，咱们不错创建一个测试类来演示中介者花式的责任面貌：

java

public class MediatorPatternDemo { www.bmthm.com

public static void main(String[] args) {

ConcreteMediator mediator = new ConcreteMediator();

ColleagueA colleagueA = mediator.getColleagueA();

ColleagueB colleagueB = mediator.getColleagueB();

colleagueA.send("Hello from A");

colleagueB.send("Hello from B");

}

}

在这个示例中，ConcreteMediator 是中介者的具体终了，它握有对 ColleagueA 和 ColleagueB 的援用。ColleagueA 和 ColleagueB 是具体的共事类，它们通过调用中介者的 changed 步调来见知中介者现象变化，然后中介者细腻配合它们之间的通讯。

脱手 MediatorPatternDemo 类中的 main 步调手机APP下载登录入口，你会看到共事类之间通过中介者进行通讯的示例输出。

voidthis中介者classsend发布于：福建省声明：该文不雅点仅代表作家本东谈主，搜狐号系信息发布平台，搜狐仅提供信息存储空间办事。