Java 中的类 getInterfaces()方法，示例

原文:https://www . geesforgeks . org/class-getinterfaces-method-in-Java-with-examples/

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。方法返回由该实体直接实现的接口数组。

语法:

public Class<T>[] getInterfaces()

参数:此方法不接受任何参数。

返回值:这个方法返回一个由这个实体直接实现的接口数组。

下面的程序演示了 getInterfaces()方法。

例 1:

// 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: []

例 2:

// 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–

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