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Java Adapter cases.

Study tha adapter pattern this morning. Found some tutorial are not as good as I imaged.

I parse my code about the adapter to demo it.

Firstly, the object adapter:

package duanbo.patterns.adapter;

public class ObjectAdapter
{
    public static void main(String[] args){   
        PutBall pb = new PutBall();   
           
        System.out.println("BasketBall");   
        BasketballBag bb = new BasketballBag();   
        pb.putBalls(bb);   
           
        System.out.println("FootBall");
        FootballBag fb = new FootballBag();   
        BallBag bbag = new BallBag(fb);   
        pb.putBalls(bbag);   
    }
}

class BallBag extends BasketballBag
{
    FootballBag fb;

    public BallBag(FootballBag fb)
    {
        this.fb = fb;
    }

    public void putball()
    {
        fb.putFootball();
    }
}

class BasketballBag
{
    public void putball()
    {
        System.out.println("Put in BasketBall.");
    }
}

class PutBall
{
    public void putBalls(BasketballBag bb)
    {
        bb.putball();
    }
}

class FootballBag
{
    public void putFootball()
    {
        System.out.println("Put in FootBall.");
    }
}

And the second demo: Class Adapter:

package duanbo.patterns.adapter;

public class ClassAdapter extends RoundPeg implements ISquarePeg
{
    private RoundPeg roundPeg;

    public ClassAdapter(RoundPeg peg)
    {
        this.roundPeg = peg;
    }

    public void insert(String str)
    {
        roundPeg.insertIntoHole(str);
    }

}

interface IRoundPeg
{
    public void insertIntoHole(String msg);
}

interface ISquarePeg
{
    public void insert(String str);
}

class SquarePeg implements ISquarePeg
{
    public void insert(String str)
    {
        System.out.println("SquarePeg insert():" + str);
    }
}

class RoundPeg implements IRoundPeg
{
    public void insertIntoHole(String msg)
    {
        System.out.println("RoundPeg insertIntoHole():" + msg);
    }
}
posted on 2008-05-05 13:19 Duan Bo Hao 阅读(251) 评论(0)  编辑  收藏

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