Here you can find the source of getMethodByTypes(Class> clazz, String name, Class> returnType, Class>... parameterTypes)
private static Method getMethodByTypes(Class<?> clazz, String name, Class<?> returnType, Class<?>... parameterTypes)
//package com.java2s; /*/* ww w. jav a 2 s. co m*/ * The MIT License (MIT) * * Copyright (c) 2016 misterT2525 * * 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.lang.reflect.Method; import java.lang.reflect.Modifier; import java.util.Arrays; public class Main { private static Method getMethodByTypes(Class<?> clazz, String name, Class<?> returnType, Class<?>... parameterTypes) { for (Method method : clazz.getDeclaredMethods()) { if (!Modifier.isPublic(method.getModifiers())) { continue; } if (method.getReturnType().equals(returnType) && Arrays.equals(method.getParameterTypes(), parameterTypes)) { return method; } } throw new RuntimeException(name + " not found in " + clazz); } }