How to connect interfaces in java

The steps for Java docking interface: 1. Define the interface; 2. Implement the interface; 3. Create a proxy class; 4. Get the proxy instance; 5. Call the interface method.

Java docking interface

How to connect the interface?

Java docking interface needs to follow the following steps:

1. Define the interface

Create a Java interface that defines the methods and properties of the interface. An interface is an abstract class that only contains method declarations but no implementation.

2. Implement the interface

Create a Java class that implements the interface method. The class must implement all methods declared in the interface.

3. Create a proxy class

Use a dynamic proxy library, such as java.lang.reflect.Proxy in JDK, to create a proxy class. Represents the interface. The proxy class intercepts calls to interface methods and delegates them to the implementation class.

4. Get the proxy instance

Call the newProxyInstance method on the proxy class to get the proxy instance of the interface.

5. Call the interface method

Through the proxy instance, you can call the interface method to execute the implementation in the implementation class.

Detailed instructions:

1. Define the interface

<code class="java">public interface IMyInterface {

    void doSomething();

    String getName();

}</code>

2. Implement the interface

<code class="java">public class MyImplementation implements IMyInterface {

    @Override
    public void doSomething() {
        // 实现 doSomething 方法
    }

    @Override
    public String getName() {
        // 实现 getName 方法
    }

}</code>

3. Create proxy class

<code class="java">IMyInterface proxy = (IMyInterface) Proxy.newProxyInstance(
        IMyInterface.class.getClassLoader(),
        new Class[] { IMyInterface.class },
        new MyInvocationHandler(new MyImplementation())
);</code>

4. Get proxy instance

<code class="java">proxy.doSomething();</code>

5. Call interface method

Through a proxy instance, you can call interface methods just like calling the actual interface, but what is actually executed is the code in the implementation class.

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