{"id":744578,"date":"2024-07-25T10:32:37","date_gmt":"2024-07-25T02:32:37","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/744578.html"},"modified":"2024-07-25T10:32:39","modified_gmt":"2024-07-25T02:32:39","slug":"%e5%af%b9%e8%b1%a1%e4%b9%8b%e9%97%b4%e6%98%af%e5%a6%82%e4%bd%95%e5%8d%8f%e4%bd%9c%e7%9a%84","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/744578.html","title":{"rendered":"\u5bf9\u8c61\u4e4b\u95f4\u662f\u5982\u4f55\u534f\u4f5c\u7684"},"content":{"rendered":"

\"\u5bf9\u8c61\u4e4b\u95f4\u662f\u5982\u4f55\u534f\u4f5c\u7684\"<\/p>\n

\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u901a\u8fc7\u6d88\u606f\u4f20\u9012\u3001\u65b9\u6cd5\u8c03\u7528\u548c\u4e8b\u4ef6\u5904\u7406\u7b49\u65b9\u5f0f\u8fdb\u884c<\/strong>\uff0c\u5176\u4e2d\u6700\u5e38\u89c1\u7684\u65b9\u5f0f\u662f\u6d88\u606f\u4f20\u9012<\/strong>\u3002\u5bf9\u8c61\u4e4b\u95f4\u901a\u8fc7\u53d1\u9001\u548c\u63a5\u6536\u6d88\u606f\u6765\u8fdb\u884c\u4ea4\u4e92\uff0c\u8c03\u7528\u5f7c\u6b64\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\u7279\u5b9a\u529f\u80fd\uff0c\u5e76\u4e14\u901a\u8fc7\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u6765\u54cd\u5e94\u548c\u5904\u7406\u5404\u79cd\u4e8b\u4ef6\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5bf9\u8c61\u4e4b\u95f4\u534f\u4f5c\u7684\u5404\u79cd\u65b9\u5f0f\u53ca\u5176\u5728\u4e0d\u540c\u7f16\u7a0b\u8303\u5f0f\u4e2d\u7684\u5b9e\u73b0\u548c\u5e94\u7528\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u6d88\u606f\u4f20\u9012<\/h3>\n<\/p>\n

\u6d88\u606f\u4f20\u9012\u662f\u5bf9\u8c61\u4e4b\u95f4\u534f\u4f5c\u7684\u6838\u5fc3\u673a\u5236\u4e4b\u4e00\u3002\u5728\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\uff0c\u5bf9\u8c61\u901a\u8fc7\u53d1\u9001\u6d88\u606f\u6765\u8bf7\u6c42\u53e6\u4e00\u4e2a\u5bf9\u8c61\u6267\u884c\u67d0\u4e2a\u52a8\u4f5c\u3002\u6d88\u606f\u53ef\u4ee5\u5305\u542b\u6240\u9700\u7684\u53c2\u6570\u4ee5\u53ca\u671f\u671b\u7684\u54cd\u5e94\u3002<\/p>\n<\/p>\n

1.1\u3001\u6d88\u606f\u7684\u5b9a\u4e49<\/h4>\n<\/p>\n

\u6d88\u606f\u901a\u5e38\u7531\u6d88\u606f\u53d1\u9001\u8005\u3001\u6d88\u606f\u63a5\u6536\u8005\u548c\u6d88\u606f\u5185\u5bb9\u7ec4\u6210\u3002\u6d88\u606f\u53d1\u9001\u8005\u5411\u6d88\u606f\u63a5\u6536\u8005\u53d1\u9001\u4e00\u4e2a\u8bf7\u6c42\uff0c\u6d88\u606f\u63a5\u6536\u8005\u5904\u7406\u8be5\u8bf7\u6c42\u5e76\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n<\/p>\n

1.2\u3001\u6d88\u606f\u4f20\u9012\u7684\u5b9e\u73b0<\/h4>\n<\/p>\n

\u5728\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u6d88\u606f\u4f20\u9012\u53ef\u4ee5\u901a\u8fc7\u65b9\u6cd5\u8c03\u7528\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff0c\u5728Java\u4e2d\uff0c\u5bf9\u8c61\u4e4b\u95f4\u7684\u6d88\u606f\u4f20\u9012\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u65b9\u6cd5\u6765\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n

class Sender {<\/p>\n
    void sendMessage(Receiver receiver, String message) {<\/p>\n
        receiver.receiveMessage(message);<\/p>\n
    }<\/p>\n
}<\/p>\n
class Receiver {<\/p>\n
    void receiveMessage(String message) {<\/p>\n
        System.out.println("Received message: " + message);<\/p>\n
    }<\/p>\n
}<\/p>\n
public class MAI<\/a>n {<\/p>\n
    public static void main(String[] args) {<\/p>\n
        Sender sender = new Sender();<\/p>\n
        Receiver receiver = new Receiver();<\/p>\n
        sender.sendMessage(receiver, "Hello, World!");<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cSender<\/code>\u5bf9\u8c61\u901a\u8fc7\u8c03\u7528Receiver<\/code>\u5bf9\u8c61\u7684receiveMessage<\/code>\u65b9\u6cd5\u6765\u53d1\u9001\u6d88\u606f\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u65b9\u6cd5\u8c03\u7528<\/h3>\n<\/p>\n
\u65b9\u6cd5\u8c03\u7528\u662f\u5bf9\u8c61\u4e4b\u95f4\u534f\u4f5c\u7684\u53e6\u4e00\u79cd\u5e38\u89c1\u65b9\u5f0f\u3002\u5bf9\u8c61\u901a\u8fc7\u8c03\u7528\u5f7c\u6b64\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\u7279\u5b9a\u529f\u80fd\uff0c\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u6a21\u5757\u5316\u548c\u53ef\u7ef4\u62a4\u3002<\/p>\n<\/p>\n
2.1\u3001\u65b9\u6cd5\u8c03\u7528\u7684\u57fa\u672c\u539f\u7406<\/h4>\n<\/p>\n
\u65b9\u6cd5\u8c03\u7528\u6d89\u53ca\u4e24\u4e2a\u5bf9\u8c61\uff1a\u8c03\u7528\u8005\u548c\u88ab\u8c03\u7528\u8005\u3002\u8c03\u7528\u8005\u5bf9\u8c61\u8c03\u7528\u88ab\u8c03\u7528\u8005\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u5e76\u4f20\u9012\u6240\u9700\u7684\u53c2\u6570\u3002\u88ab\u8c03\u7528\u8005\u5bf9\u8c61\u5904\u7406\u8be5\u8bf7\u6c42\u5e76\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n<\/p>\n
2.2\u3001\u65b9\u6cd5\u8c03\u7528\u7684\u5b9e\u73b0<\/h4>\n<\/p>\n
\u5728\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\uff0c\u65b9\u6cd5\u8c03\u7528\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
class Calculator {<\/p>\n
    int add(int a, int b) {<\/p>\n
        return a + b;<\/p>\n
    }<\/p>\n
}<\/p>\n
public class Main {<\/p>\n
    public static void main(String[] args) {<\/p>\n
        Calculator calculator = new Calculator();<\/p>\n
        int result = calculator.add(5, 3);<\/p>\n
        System.out.println("Result: " + result);<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cMain<\/code>\u7c7b\u901a\u8fc7\u8c03\u7528Calculator<\/code>\u5bf9\u8c61\u7684add<\/code>\u65b9\u6cd5\u6765\u5b9e\u73b0\u4e24\u4e2a\u6574\u6570\u7684\u76f8\u52a0\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4e8b\u4ef6\u5904\u7406<\/h3>\n<\/p>\n
\u4e8b\u4ef6\u5904\u7406\u662f\u4e00\u79cd\u57fa\u4e8e\u4e8b\u4ef6\u9a71\u52a8\u7684\u5bf9\u8c61\u534f\u4f5c\u65b9\u5f0f\u3002\u5bf9\u8c61\u901a\u8fc7\u76d1\u542c\u548c\u5904\u7406\u4e8b\u4ef6\u6765\u5b9e\u73b0\u534f\u4f5c\uff0c\u8fd9\u79cd\u65b9\u5f0f\u901a\u5e38\u7528\u4e8e\u7528\u6237\u754c\u9762\u7f16\u7a0b\u548c\u5f02\u6b65\u7f16\u7a0b\u4e2d\u3002<\/p>\n<\/p>\n
3.1\u3001\u4e8b\u4ef6\u7684\u5b9a\u4e49<\/h4>\n<\/p>\n
\u4e8b\u4ef6\u662f\u67d0\u4e2a\u7279\u5b9a\u64cd\u4f5c\u6216\u72b6\u6001\u53d8\u5316\u7684\u4fe1\u53f7\u3002\u4e8b\u4ef6\u901a\u5e38\u7531\u4e8b\u4ef6\u6e90\u3001\u4e8b\u4ef6\u7c7b\u578b\u548c\u4e8b\u4ef6\u5904\u7406\u5668\u7ec4\u6210\u3002\u4e8b\u4ef6\u6e90\u662f\u89e6\u53d1\u4e8b\u4ef6\u7684\u5bf9\u8c61\uff0c\u4e8b\u4ef6\u7c7b\u578b\u63cf\u8ff0\u4e86\u4e8b\u4ef6\u7684\u6027\u8d28\uff0c\u4e8b\u4ef6\u5904\u7406\u5668\u662f\u5904\u7406\u8be5\u4e8b\u4ef6\u7684\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
3.2\u3001\u4e8b\u4ef6\u5904\u7406\u7684\u5b9e\u73b0<\/h4>\n<\/p>\n
\u5728\u4e8b\u4ef6\u9a71\u52a8\u7f16\u7a0b\u4e2d\uff0c\u4e8b\u4ef6\u5904\u7406\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff0c\u5728Java\u4e2d\uff0c\u4e8b\u4ef6\u5904\u7406\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0\u4e8b\u4ef6\u76d1\u542c\u5668\u63a5\u53e3\u6765\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n
import java.awt.event.ActionEvent;<\/p>\n
import java.awt.event.ActionListener;<\/p>\n
import javax.swing.JButton;<\/p>\n
import javax.swing.JFrame;<\/p>\n
public class EventHandlingExample {<\/p>\n
    public static void main(String[] args) {<\/p>\n
        JFrame frame = new JFrame("Event Handling Example");<\/p>\n
        JButton button = new JButton("Click Me");<\/p>\n
        button.addActionListener(new ActionListener() {<\/p>\n
            @Override<\/p>\n
            public void actionPerformed(ActionEvent e) {<\/p>\n
                System.out.println("Button clicked!");<\/p>\n
            }<\/p>\n
        });<\/p>\n
        frame.add(button);<\/p>\n
        frame.setSize(300, 200);<\/p>\n
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<\/p>\n
        frame.setVisible(true);<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cbutton<\/code>\u5bf9\u8c61\u901a\u8fc7\u6dfb\u52a0\u4e00\u4e2aActionListener<\/code>\u6765\u76d1\u542c\u70b9\u51fb\u4e8b\u4ef6\uff0c\u5f53\u7528\u6237\u70b9\u51fb\u6309\u94ae\u65f6\uff0cactionPerformed<\/code>\u65b9\u6cd5\u88ab\u8c03\u7528\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f9d\u8d56\u6ce8\u5165<\/h3>\n<\/p>\n
\u4f9d\u8d56\u6ce8\u5165\u662f\u4e00\u79cd\u5bf9\u8c61\u534f\u4f5c\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u901a\u8fc7\u5c06\u4f9d\u8d56\u9879\u6ce8\u5165\u5230\u5bf9\u8c61\u4e2d\uff0c\u4f7f\u5f97\u5bf9\u8c61\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u6d4b\u8bd5\u3002<\/p>\n<\/p>\n
4.1\u3001\u4f9d\u8d56\u6ce8\u5165\u7684\u57fa\u672c\u539f\u7406<\/h4>\n<\/p>\n
\u4f9d\u8d56\u6ce8\u5165\u6d89\u53ca\u4e09\u4e2a\u89d2\u8272\uff1a\u4f9d\u8d56\u9879\u3001\u88ab\u4f9d\u8d56\u5bf9\u8c61\u548c\u6ce8\u5165\u5668\u3002\u4f9d\u8d56\u9879\u662f\u88ab\u6ce8\u5165\u7684\u5bf9\u8c61\uff0c\u88ab\u4f9d\u8d56\u5bf9\u8c61\u662f\u4f9d\u8d56\u4e8e\u5176\u4ed6\u5bf9\u8c61\u7684\u5bf9\u8c61\uff0c\u6ce8\u5165\u5668\u8d1f\u8d23\u5c06\u4f9d\u8d56\u9879\u6ce8\u5165\u5230\u88ab\u4f9d\u8d56\u5bf9\u8c61\u4e2d\u3002<\/p>\n<\/p>\n
4.2\u3001\u4f9d\u8d56\u6ce8\u5165\u7684\u5b9e\u73b0<\/h4>\n<\/p>\n
\u5728\u7f16\u7a0b\u4e2d\uff0c\u4f9d\u8d56\u6ce8\u5165\u53ef\u4ee5\u901a\u8fc7\u6784\u9020\u51fd\u6570\u6ce8\u5165\u3001setter\u65b9\u6cd5\u6ce8\u5165\u548c\u63a5\u53e3\u6ce8\u5165\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
class Service {<\/p>\n
    void performAction() {<\/p>\n
        System.out.println("Service action performed.");<\/p>\n
    }<\/p>\n
}<\/p>\n
class Client {<\/p>\n
    private Service service;<\/p>\n
    Client(Service service) {<\/p>\n
        this.service = service;<\/p>\n
    }<\/p>\n
    void doSomething() {<\/p>\n
        service.performAction();<\/p>\n
    }<\/p>\n
}<\/p>\n
public class DependencyInjectionExample {<\/p>\n
    public static void main(String[] args) {<\/p>\n
        Service service = new Service();<\/p>\n
        Client client = new Client(service);<\/p>\n
        client.doSomething();<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cClient<\/code>\u5bf9\u8c61\u901a\u8fc7\u6784\u9020\u51fd\u6570\u6ce8\u5165\u4f9d\u8d56\u9879Service<\/code>\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u89c2\u5bdf\u8005\u6a21\u5f0f<\/h3>\n<\/p>\n
\u89c2\u5bdf\u8005\u6a21\u5f0f\u662f\u4e00\u79cd\u5bf9\u8c61\u534f\u4f5c\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5141\u8bb8\u5bf9\u8c61\u4e4b\u95f4\u5efa\u7acb\u4e00\u5bf9\u591a\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u4f7f\u5f97\u4e00\u4e2a\u5bf9\u8c61\u7684\u72b6\u6001\u53d8\u5316\u80fd\u591f\u901a\u77e5\u5e76\u66f4\u65b0\u591a\u4e2a\u89c2\u5bdf\u8005\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
5.1\u3001\u89c2\u5bdf\u8005\u6a21\u5f0f\u7684\u57fa\u672c\u539f\u7406<\/h4>\n<\/p>\n
\u89c2\u5bdf\u8005\u6a21\u5f0f\u6d89\u53ca\u4e24\u4e2a\u89d2\u8272\uff1a\u88ab\u89c2\u5bdf\u8005\u548c\u89c2\u5bdf\u8005\u3002\u88ab\u89c2\u5bdf\u8005\u5bf9\u8c61\u7ef4\u62a4\u4e00\u4e2a\u89c2\u5bdf\u8005\u5217\u8868\uff0c\u5f53\u5176\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u901a\u77e5\u6240\u6709\u89c2\u5bdf\u8005\u5bf9\u8c61\u8fdb\u884c\u66f4\u65b0\u3002<\/p>\n<\/p>\n
5.2\u3001\u89c2\u5bdf\u8005\u6a21\u5f0f\u7684\u5b9e\u73b0<\/h4>\n<\/p>\n
\u5728\u7f16\u7a0b\u4e2d\uff0c\u89c2\u5bdf\u8005\u6a21\u5f0f\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u88ab\u89c2\u5bdf\u8005\u63a5\u53e3\u548c\u4e00\u4e2a\u89c2\u5bdf\u8005\u63a5\u53e3\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
import java.util.ArrayList;<\/p>\n
import java.util.List;<\/p>\n
interface Observer {<\/p>\n
    void update(String message);<\/p>\n
}<\/p>\n
class Subject {<\/p>\n
    private List<Observer> observers = new ArrayList<>();<\/p>\n
    void addObserver(Observer observer) {<\/p>\n
        observers.add(observer);<\/p>\n
    }<\/p>\n
    void removeObserver(Observer observer) {<\/p>\n
        observers.remove(observer);<\/p>\n
    }<\/p>\n
    void notifyObservers(String message) {<\/p>\n
        for (Observer observer : observers) {<\/p>\n
            observer.update(message);<\/p>\n
        }<\/p>\n
    }<\/p>\n
}<\/p>\n
class ConcreteObserver implements Observer {<\/p>\n
    private String name;<\/p>\n
    ConcreteObserver(String name) {<\/p>\n
        this.name = name;<\/p>\n
    }<\/p>\n
    @Override<\/p>\n
    public void update(String message) {<\/p>\n
        System.out.println(name + " received message: " + message);<\/p>\n
    }<\/p>\n
}<\/p>\n
public class ObserverPatternExample {<\/p>\n
    public static void main(String[] args) {<\/p>\n
        Subject subject = new Subject();<\/p>\n
        Observer observer1 = new ConcreteObserver("Observer 1");<\/p>\n
        Observer observer2 = new ConcreteObserver("Observer 2");<\/p>\n
        subject.addObserver(observer1);<\/p>\n
        subject.addObserver(observer2);<\/p>\n
        subject.notifyObservers("Hello, Observers!");<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cSubject<\/code>\u5bf9\u8c61\u7ef4\u62a4\u4e00\u4e2a\u89c2\u5bdf\u8005\u5217\u8868\uff0c\u5e76\u5728\u72b6\u6001\u53d8\u5316\u65f6\u901a\u77e5\u6240\u6709\u89c2\u5bdf\u8005\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
\u516d\u3001\u63a5\u53e3\u4e0e\u591a\u6001<\/h3>\n<\/p>\n
\u63a5\u53e3\u4e0e\u591a\u6001\u662f\u5bf9\u8c61\u4e4b\u95f4\u534f\u4f5c\u7684\u57fa\u7840\uff0c\u901a\u8fc7\u5b9a\u4e49\u63a5\u53e3\u548c\u5b9e\u73b0\u591a\u6001\u6027\uff0c\u4f7f\u5f97\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u6269\u5c55\u3002<\/p>\n<\/p>\n
6.1\u3001\u63a5\u53e3\u7684\u5b9a\u4e49<\/h4>\n<\/p>\n
\u63a5\u53e3\u5b9a\u4e49\u4e86\u4e00\u7ec4\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u7531\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u6765\u5b9e\u73b0\u3002\u63a5\u53e3\u63d0\u4f9b\u4e86\u4e00\u79cd\u62bd\u8c61\u5c42\uff0c\u4f7f\u5f97\u4e0d\u540c\u7684\u7c7b\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0\u76f8\u540c\u7684\u63a5\u53e3\u6765\u5b9e\u73b0\u76f8\u540c\u7684\u884c\u4e3a\u3002<\/p>\n<\/p>\n
6.2\u3001\u591a\u6001\u7684\u5b9e\u73b0<\/h4>\n<\/p>\n
\u591a\u6001\u5141\u8bb8\u4e00\u4e2a\u5bf9\u8c61\u901a\u8fc7\u63a5\u53e3\u6216\u7236\u7c7b\u5f15\u7528\u6765\u8c03\u7528\u4e0d\u540c\u5b50\u7c7b\u7684\u5b9e\u73b0\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
interface Animal {<\/p>\n
    void makeSound();<\/p>\n
}<\/p>\n
class Dog implements Animal {<\/p>\n
    @Override<\/p>\n
    public void makeSound() {<\/p>\n
        System.out.println("Woof!");<\/p>\n
    }<\/p>\n
}<\/p>\n
class Cat implements Animal {<\/p>\n
    @Override<\/p>\n
    public void makeSound() {<\/p>\n
        System.out.println("Meow!");<\/p>\n
    }<\/p>\n
}<\/p>\n
public class PolymorphismExample {<\/p>\n
    public static void main(String[] args) {<\/p>\n
        Animal dog = new Dog();<\/p>\n
        Animal cat = new Cat();<\/p>\n
        dog.makeSound();<\/p>\n
        cat.makeSound();<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cAnimal<\/code>\u63a5\u53e3\u5b9a\u4e49\u4e86makeSound<\/code>\u65b9\u6cd5\uff0c\u4e0d\u540c\u7684\u52a8\u7269\u7c7b\u901a\u8fc7\u5b9e\u73b0\u8be5\u63a5\u53e3\u6765\u63d0\u4f9b\u5177\u4f53\u7684\u5b9e\u73b0\uff0c\u4ece\u800c\u5b9e\u73b0\u591a\u6001\u6027\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6838\u5fc3\uff0c\u901a\u8fc7\u6d88\u606f\u4f20\u9012\u3001\u65b9\u6cd5\u8c03\u7528\u3001\u4e8b\u4ef6\u5904\u7406\u3001\u4f9d\u8d56\u6ce8\u5165\u3001\u89c2\u5bdf\u8005\u6a21\u5f0f\u548c\u63a5\u53e3\u4e0e\u591a\u6001\u7b49\u65b9\u5f0f<\/strong>\uff0c\u5bf9\u8c61\u80fd\u591f\u5b9e\u73b0\u590d\u6742\u7684\u529f\u80fd\u548c\u4ea4\u4e92\u3002\u4e86\u89e3\u548c\u638c\u63e1\u8fd9\u4e9b\u534f\u4f5c\u65b9\u5f0f\uff0c\u4e0d\u4ec5\u80fd\u591f\u63d0\u9ad8\u4ee3\u7801\u7684\u6a21\u5757\u5316\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u8fd8\u80fd\u589e\u5f3a\u7cfb\u7edf\u7684\u7075\u6d3b\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u4ec0\u4e48\u662f\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\uff1f<\/strong>
\n\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u662f\u6307\u5728\u8f6f\u4ef6\u5f00\u53d1\u4e2d\uff0c\u4e0d\u540c\u7684\u5bf9\u8c61\u901a\u8fc7\u76f8\u4e92\u901a\u4fe1\u548c\u4e92\u76f8\u8c03\u7528\u7684\u65b9\u5f0f\u8fdb\u884c\u5408\u4f5c\uff0c\u4ee5\u5b9e\u73b0\u7279\u5b9a\u7684\u529f\u80fd\u6216\u5b8c\u6210\u7279\u5b9a\u7684\u4efb\u52a1\u3002<\/p>\n
2. \u5bf9\u8c61\u4e4b\u95f4\u534f\u4f5c\u7684\u65b9\u5f0f\u6709\u54ea\u4e9b\uff1f<\/strong>
\n\u5bf9\u8c61\u4e4b\u95f4\u534f\u4f5c\u7684\u65b9\u5f0f\u6709\u591a\u79cd\uff0c\u5176\u4e2d\u5305\u62ec\u6d88\u606f\u4f20\u9012\u3001\u65b9\u6cd5\u8c03\u7528\u3001\u4e8b\u4ef6\u89e6\u53d1\u7b49\u3002\u6d88\u606f\u4f20\u9012\u662f\u6307\u5bf9\u8c61\u4e4b\u95f4\u901a\u8fc7\u53d1\u9001\u548c\u63a5\u6536\u6d88\u606f\u6765\u5b9e\u73b0\u901a\u4fe1\uff1b\u65b9\u6cd5\u8c03\u7528\u662f\u6307\u4e00\u4e2a\u5bf9\u8c61\u8c03\u7528\u53e6\u4e00\u4e2a\u5bf9\u8c61\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\u5408\u4f5c\uff1b\u4e8b\u4ef6\u89e6\u53d1\u662f\u6307\u4e00\u4e2a\u5bf9\u8c61\u53d1\u751f\u67d0\u4e2a\u4e8b\u4ef6\u65f6\uff0c\u901a\u77e5\u5176\u4ed6\u5bf9\u8c61\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002<\/p>\n
3. \u5982\u4f55\u4fdd\u8bc1\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u7684\u6709\u6548\u6027\u548c\u53ef\u9760\u6027\uff1f<\/strong>
\n\u4e3a\u4e86\u4fdd\u8bc1\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u7684\u6709\u6548\u6027\u548c\u53ef\u9760\u6027\uff0c\u53ef\u4ee5\u91c7\u53d6\u4e00\u4e9b\u63aa\u65bd\u3002\u9996\u5148\uff0c\u8bbe\u8ba1\u826f\u597d\u7684\u63a5\u53e3\u548c\u534f\u8bae\u53ef\u4ee5\u786e\u4fdd\u5bf9\u8c61\u4e4b\u95f4\u7684\u901a\u4fe1\u548c\u8c03\u7528\u662f\u51c6\u786e\u548c\u53ef\u9760\u7684\uff1b\u5176\u6b21\uff0c\u4f7f\u7528\u5408\u9002\u7684\u8bbe\u8ba1\u6a21\u5f0f\u548c\u67b6\u6784\u53ef\u4ee5\u63d0\u9ad8\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u6548\u7387\u548c\u7075\u6d3b\u6027\uff1b\u6700\u540e\uff0c\u8fdb\u884c\u9002\u5f53\u7684\u6d4b\u8bd5\u548c\u8c03\u8bd5\u53ef\u4ee5\u53d1\u73b0\u548c\u89e3\u51b3\u6f5c\u5728\u7684\u95ee\u9898\uff0c\u786e\u4fdd\u534f\u4f5c\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5bf9\u8c61\u4e4b\u95f4\u7684\u534f\u4f5c\u901a\u8fc7\u6d88\u606f\u4f20\u9012\u3001\u65b9\u6cd5\u8c03\u7528\u548c\u4e8b\u4ef6\u5904\u7406\u7b49\u65b9\u5f0f\u8fdb\u884c\uff0c\u5176\u4e2d\u6700\u5e38\u89c1\u7684\u65b9\u5f0f\u662f\u6d88\u606f\u4f20\u9012\u3002\u5bf9\u8c61\u4e4b\u95f4\u901a\u8fc7\u53d1\u9001\u548c\u63a5\u6536\u6d88 […]","protected":false},"author":3,"featured_media":744582,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/744578"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=744578"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/744578\/revisions"}],"predecessor-version":[{"id":744583,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/744578\/revisions\/744583"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/744582"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=744578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=744578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=744578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}