网站建设登录结构图,国外做化工网站,徐州市做网站,网站建设用到什么软件使用接口进行如下程序设计个人电脑(PC)具有PCI插槽#xff0c;可以插入PCI卡。显卡、声卡、语音卡都可以作为PCI卡插入PCI插槽中PC,PCI,slot,VideoCard,SoundCard, VoiceCardinterface PCI{public void pci();}class VideoCard implements PCI{public void pci(){System.out.p…使用接口进行如下程序设计个人电脑(PC)具有PCI插槽可以插入PCI卡。显卡、声卡、语音卡都可以作为PCI卡插入PCI插槽中PC,PCI,slot,VideoCard,SoundCard, VoiceCardinterface PCI{public void pci();}class VideoCard implements PCI{public void pci(){System.out.println(This is a videoCard);}}class SoundCard implements PCI{public void pci(){System.out.println(This is a soundCard);}class VoiceCard implements PCI{public void pci(){System.out.println(This is a voiceCard);}class PC{public void slot(PCI pci){pci.pci();}}class PCIDemo{public static void main(String[] args){PC pc new PC();pc.slot(new VideoCard());pc.slot(new SoundCard());pc.slot(new VoiceCard());}}高富帅HeightRichHandsomeGirl boyFriend(HRH h)用匿名内部类实现interface Height{public void high();}interface Rich{public void rich();}interface Handsome{public void handsome();}interface HRH extends Height,Rich,Handsome{}class Girl{public void boyFriend(HRH h){h.high();h.rich();h.handsome();}}class NoNameDemo{public static void main(String[] args){Girl girl new Girl();girl.boyFriend(new HRH(){public void high(){System.out.println(很高);}public void handsome(){System.out.println(“很帅”);}public void rich(){System.out.println(“很有钱”);}});}}使用适配器模式实现窗口的事件处理程序窗口可以响应最大化事件、最小化事件、大小改变事件、恢复事件、移动事件、关闭事件通过适配器对大小改变事件、移动事件和关闭进行默认处理窗口只关心最大化和最小化事件即可。WindowWindowListener{max min resize restore move close}interface WindowListener{public void max();public void min();public void resize();public void restore();public void move();public void close();}abstract class WindowListenerAdapter implements WindowListener{public void resize(){}public void restore(){}public void move(){}public void close(){}}class Window{WindowListener listener;public void setListener(WindowListener listener){this.listener listener;}public void max(){listener.max();}public void min(){listener.min();}}class AdapterDemo(){public static void main(String[] args){Window window new Window();window.setListener(new WindowListenerAdapter(){public void max(){System.out.println(窗口最大化);}public void max(){System.out.println(窗口最小化);}});window.max();window.min();}}使用抽象类和接口实现适配器模式设计。涉及的类和接口分别为ButtonListener(接口),其中含有click() / dbclick() / keyUp() / keyDown()等方法。ButtonAdapter(按钮适配器类)适配器中对非click()方法进行默认实现。Button类中添加addListener(ButtonListener l)方法。interface ButtonListener{public void click();public void dbclick();public void keyUp();public void keyDown();}abstract class ButtonAdapter implements ButtonListener {public void keyUp(){}public void keyDown(){}}class Button{private ButtonListener l;public void addListener(ButtonListener l){this.l l;}public void click(){l.click();}public void dbclick(){l.dbclick();}}class AdapterDemo(){public static void main(String[] args){Button button new Button();Button.addListener(new ButtonAdapter(){public void click(){System.out.println(单击了按钮);}public void dbclick(){System.out.println(双击了按钮);}});button.click();button.dbclick();}}阐述什么是多态。为什么函数可以覆盖而属性不能覆盖答对象的多种状态对继承来说用父类引用子类的对象对接口来说用接口引用实现类的对象。根据javabean原则公有方法可以被继承因此可以被子类覆盖而属性是私有财产不能被子类覆盖。
