Here you can find the source of getAllInterfaces(Class base)
private static List<Class<?>> getAllInterfaces(Class<?> base)
//package com.java2s; /*//from w w w . ja v a 2s.c o m * CodeAPI - Framework to generate Java code and Bytecode code. <https://github.com/JonathanxD/CodeAPI> * * The MIT License (MIT) * * Copyright (c) 2017 TheRealBuggy/JonathanxD (https://github.com/JonathanxD/ & https://github.com/TheRealBuggy/) <jonathan.scripter@programmer.net> * Copyright (c) contributors * * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import java.util.ArrayList; import java.util.List; public class Main { private static List<Class<?>> getAllInterfaces(Class<?> base) { List<Class<?>> classes = new ArrayList<>(); Class<?>[] interfaces = base.getInterfaces(); for (Class<?> anInterface : interfaces) { classes.add(anInterface); classes.addAll(getAllInterfaces(anInterface)); } return classes; } }