Java中的类 getGenericInterfaces() 方法和示例

Java.lang.Class 类的getGenericInterfaces()方法用于获取该实体直接实现的接口类型。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类型数组。

句法：

public Type[] getGenericInterfaces()

参数：此方法不接受任何参数。

返回值：该方法返回该实体直接实现的接口类型数组。

下面的程序演示了 getGenericInterfaces() 方法。

示例 1：

// Java program to demonstrate
// getGenericInterfaces() 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 type of interfaces of myClass
        // using getGenericInterfaces() method
        System.out.println(
            "GenericInterfaces of myClass: "
            + Arrays.toString(
                  myClass.getGenericInterfaces()));
    }
}

输出：

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

示例 2：

// Java program to demonstrate
// getGenericInterfaces() 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 type of interfaces of myClass
        // using getGenericInterfaces() method
        System.out.println(
            "GenericInterfaces of myClass: "
            + Arrays.toString(
                  myClass.getGenericInterfaces()));
    }
}

输出：

GenericInterfaces of myClass: [interface Arr]

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