Java第四周常用类与集合框架之接口+抽象类9-9

1、定义接口：package test9_9photo;public interface InterfaceTest {    String action="照相";    public void picture(String stype);}2、定义抽象类：package test9_9photo;public abstract class InterfaceTest_phone {    String phonestyle="手机";    public abstract void phoneofphoto(String stype);    public String toString(){        return "这是："+phonestyle;    }}3、定义抽象类的子类手机的子类拍照类继承抽象类和接口：package test9_9photo;public   class InterfaceTest_picturephone extends InterfaceTest_phone implements  InterfaceTest   {   public   String picture="高像素小清新拍照手机";    public void takepicturetest() {        System.out.println("%%%%%%%%%%%%%%%%%");        System.out.println(" 类的InterfaceTest_picturephone的takepicture()方法中");        System.out.println("&&&&&&&&&&……………………&&&&&&&");        picture(action+"\n");    }    public  void picture(String stype) {        System.out.println(" 这是："+stype);         phoneofphoto(phonestyle+"子类的拍照手机！");    }    public void phoneofphoto(String stype) {        System.out.println("\n"+stype);        this.toString();    }}4、子类手机的子类拍照类的测试类写上main（）方法，运行起来：package test9_9photo;public   class InterfaceTest_picturephonemain  {    public static void main(String[] args){        InterfaceTest_picturephone picturephone=new InterfaceTest_picturephone();        picturephone.takepicturetest();        picturephone.picture(picturephone.picture);        picturephone.picture(picturephone.phonestyle);        picturephone.phoneofphoto(picturephone.picture);    }}运算结果呢：%%%%%%%%%%%%%%%%% 类的InterfaceTest_picturephone的takepicture()方法中&&&&&&&&&&……………………&&&&&&& 这是：照相手机子类的拍照手机！ 这是：高像素小清新拍照手机手机子类的拍照手机！ 这是：手机手机子类的拍照手机！高像素小清新拍照手机5、定义抽象类的另一个子类普通手机只继承抽象类手机类：package test9_9photo;public class InterfaceTest_usualphone extends  InterfaceTest_phone{     String typeofphone="普通手机！";    public  void phoneofphoto(String stype) {         System.out.println("这是："+stype+"\n");    }}6、普通手机的测试类，然后写main（）方法，进行具体实现调用测试功能：package test9_9photo;public class InterfaceTest_usualphonemain {    public static void main(String[] args) {        InterfaceTest_usualphone usual=new InterfaceTest_usualphone();        usual.phoneofphoto(usual.typeofphone);    }}7、测试运行结果：这是：普通手机！