public abstract class Person
{
    protected String name;
    protected Mediator mediator;

    Person(String name, Mediator mediator)
    {
        this.name = name;
        this.mediator = mediator;
    }
}

3 ¾ßÌåͬÊÂÀà
·¿¶«£º

public class HouseOwner extends Person
{
    HouseOwner(String name, Mediator mediator)
    {
        super(name, mediator);
    }

    public void contact(String message)
    {
        mediator.contact(message, this);
    }

    public void getMessage(String message)
    {
        System.out.println("HouseOwner : "+name+", Get Message: "+message);
    }
}

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public class Tenant extends Person
{
    Tenant(String name, Mediator mediator)
    {
        super(name, mediator);
    }

    public void contact(String message)
    {
        mediator.contact(message, this);
    }

    public void getMessage(String message)
    {
        System.out.println("Tenant : "+name+", Get Message: "+message);
    }
}

4 Öнé

public class MediatorStructure implements Mediator
{
    private HouseOwner houseOwner;
    private Tenant tenant;

    public HouseOwner getHouseOwner()
    {
        return houseOwner;
    }
    public void setHouseOwner(HouseOwner houseOwner)
    {
        this.houseOwner = houseOwner;
    }
    public Tenant getTenant()
    {
        return tenant;
    }
    public void setTenant(Tenant tenant)
    {
        this.tenant = tenant;
    }

    @Override
    public void contact(String message, Person person)
    {
        if(person == houseOwner)
        {
            tenant.getMessage(message);
        }
        else
        {
            houseOwner.getMessage(message);
        }
    }
}

5 ²âÊÔ´úÂë

        MediatorStructure mediator = new MediatorStructure();

        HouseOwner houseOwner = new HouseOwner("qq",mediator);
        Tenant tenant = new Tenant("jj",mediator);

        mediator.setHouseOwner(houseOwner);
        mediator.setTenant(tenant);

        tenant.contact("I wanna a house");
        houseOwner.contact("I have~");

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HouseOwner : qq, Get Message: I wanna a house
Tenant : jj, Get Message: I have~

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JDKÖеÄÖнéÕßģʽ£º
java.util.Timer
java.util.concurrent.Executor#execute()
java.util.concurrent.ExecutorService#submit()
java.lang.reflect.Method#invoke()