面向对象-duck

Posted 2020-08-09

package oo;

public interface Duck {
    public void fly();

    public void quack();
}

package oo;

public class MallardDuck implements Duck {
    public void fly()
    {
        System.out.println("I‘m flying");
    }
    public void quack()
    {
        System.out.println("Quack");
    }

}

package oo;

public interface Turkey {
    public void gobble();
    public void fly();

}

 

package oo;

public class WildTurkey implements Turkey{
    public void gobble()
    {
        System.out.println("Gobble gobble");
    }
    public void fly()
    {
        System.out.println("I‘m flying a short distance");
    }

}

 

 

package oo;

import java.util.Random;

public class DuckAdapter implements Turkey{
Duck duck;
Random rand;

public DuckAdapter(Duck duck)
{
    this.duck=duck;
    rand=new Random();
}
public void gobble()
{
    duck.quack();
}
public void fly()
{
    if (rand.nextInt(5)==0)
    {
        duck.fly();
    }
}
}

 

 

package oo;

public class TurkeyAdapter implements Duck{
Turkey turkey;
public TurkeyAdapter(Turkey turkey)
{
    this.turkey=turkey;
}
public void quack()
{
    turkey.gobble();
}
public void fly()
{
    for (int i=0;i<5;i++)
    {
        turkey.fly();
    }
}
}

 

package oo;

public class DuckTestDrive {
public static void main(String[]args)
{
    MallardDuck duck=new MallardDuck();
    WildTurkey turkey=new WildTurkey();
    Duck turkeyAdapter=new TurkeyAdapter(turkey);
    System.out.println("the turkey says..");
    turkey.gobble();
    turkey.fly();
    System.out.println("the duck says..");
    test(duck);
    System.out.println("the turkeyadapter says..");
    test(turkeyAdapter);
}

static void test(Duck duck)
{
    duck.quack();
    duck.fly();
}
}

 

package oo;

public class TurkeyTestDrive {
public static void main(String []args)
{
    MallardDuck duck=new MallardDuck();
    Turkey duckAdapter=new DuckAdapter(duck);
    for(int i=0;i<10;i++)
    {
        System.out.println("the duckadapter says..");
        duckAdapter.gobble();
        duckAdapter.fly();
    }
}
}