Java中的接口继承

JAVA中类不能多继承，接口继承实现这个功能SSH框架的DAO
interface Dao<T>
BaseHibernateDao<T> extends HibernateDaoSupport implements Dao<T>
interface **Dao extends Dao
**DaoImpl extends BaseHibernateDao implements **Dao

public interface A{public void run();}

public interface B extends A{public void say();}

public interface C{public void say();}

public class Test1 implements B{public void say(){}public void run(){}}

public class Test2 implements A,C{public void say(){}public void run(){}}