dogfactory.java

来自「Spring2.0宝典」· Java 代码 · 共 39 行

package lee;

/*
 * @author  yeeku.H.lee [e-mail]
 * @version  1.0
 * <br>Copyright (C), 2005-2008, yeeku.H.Lee
 * <br>This program is protected by copyright laws.
 * <br>Program Name:
 * <br>Date: 
 */
public class DogFactory
{
    private static DogFactory df;
    private Dog gundog;
    private DogFactory()
    {
    }
    public static DogFactory instance()
    {
        if (df == null)
        {
            df = new DogFactory();
        }
        return df;
    }
    public Dog getDog(String dogName)
    {
        if (dogName.equals("gundog"))
        {
            if (gundog == null )
            {
                gundog = new DogImpl();
            }
            return gundog;
        }
        return null;
    }
}