Java中的类 getInterfaces() 方法和示例

Java.lang.Class 类的getInterfaces()方法用于获取该实体直接实现的接口。该实体可以是类或接口。该方法返回由该实体直接实现的接口数组。
句法：

public Class[] getInterfaces()

参数：此方法不接受任何参数。
返回值：该方法返回一个由该实体直接实现的接口数组。
下面的程序演示了 getInterfaces() 方法。
示例 1：

Java

// Java program to demonstrate getInterfaces() method
 
import java.util.*;
 
public class Test {
    public static void main(String[] args)
        throws ClassNotFoundException
    {
 
        // returns the Class object for this class
        Class myClass = Class.forName("Test");
 
        System.out.println("Class represented by myClass: "
                           + myClass.toString());
 
        // Get the interfaces of myClass
        // using getInterfaces() method
        System.out.println(
            "Interfaces of myClass: "
            + Arrays.toString(
                  myClass.getInterfaces()));
    }
}

输出：

Class represented by myClass: class Test
Interfaces of myClass: []

示例 2：

Java

// Java program to demonstrate getInterfaces() method
 
import java.util.*;
 
interface Arr {
}
 
public class Test implements Arr {
 
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object
        Class myClass = Class.forName("Test");
 
        // Get the interfaces of myClass
        // using getInterfaces() method
        System.out.println(
            "Interfaces of myClass: "
            + Arrays.toString(
                  myClass.getInterfaces()));
    }
}

输出：

Interfaces of myClass: [interface Arr]

参考： https://docs.oracle.com/javase/9/docs/api/ Java/lang/Class.html#getInterfaces–