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Java 检查给定的类“ clazz”是否覆盖类“ base Clazz”中的给定方法。
检查给定的类“ clazz”是否覆盖类“ base Clazz”中的给定方法。
实例源码：
源代码：
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/**3
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* Copyright (c) 2007-2011, JAGaToo Project Group all rights reserved.5
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* 7
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* Redistribution and use in source and binary forms, with or without9
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* modification, are permitted provided that the following conditions are met:11
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* 13
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* Redistributions of source code must retain the above copyright notice,15
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* this list of conditions and the following disclaimer.17
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* 19
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* Redistributions in binary form must reproduce the above copyright notice,21
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* this list of conditions and the following disclaimer in the documentation23
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* and/or other materials provided with the distribution.25
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* 27
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* Neither the name of the 'Xith3D Project Group' nor the names of its29
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* contributors may be used to endorse or promote products derived from this31
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* software without specific prior written permission.33
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* 35
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"37
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE39
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE41
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE43
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR45
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF47
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS49
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN51
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) A53
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* RISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE55
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* POSSIBILITY OF SUCH DAMAGE57
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*/59
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//package com.nowjava;/**时代Java公众号 - N o w J a v a . c o m**/61
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import java.lang.reflect.Method;63
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public class Main {66
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public static void main(String[] argv) throws Exception {68
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Class baseClazz = String.class;70
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Class clazz = String.class;72
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String methodName = "nowjava.com";74
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Class parameterTypes = String.class;76
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System.out.println(overridesMethod(baseClazz, clazz, methodName,78
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parameterTypes));80
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}82
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/**85
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* Checks, whether the given Class 'clazz' overrides the given method in the Class 'baseClazz'.87
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* 89
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* @param baseClazz the Class declaring the base method91
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* @param clazz the sub class possibly overriding the method93
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* @param methodName the name of the method95
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* @param parameterTypes the parameters of the method97
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* 99
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* @return <code>true</code>, if the class overrides the given method, <code>false</code> if not, null, if the method doesn't exist or another error occurrs.101
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*/103
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public static Boolean overridesMethod(Class<?> baseClazz,/* 来自 n o w j a v a . c o m*/105
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Class<?> clazz, String methodName, Class<?> parameterTypes) {107
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Method m = findMethod(clazz, methodName, parameterTypes);109
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if (m == null)112
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return (null);114
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return (m.getDeclaringClass() != baseClazz);117
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}119
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/**122
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* Gets the method from the given class without exceptions and also searches super classes.124
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* 126
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* @param clazz128
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* @param methodName130
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* @param parameterTypes132
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* 134
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* @return the method or null, if it doesn't exist or other problems occurr.136
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*/138
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public static Method findMethod(Class<?> clazz, String methodName,140
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Class<?> parameterTypes) {142
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Method m = getPublicMethod(clazz, methodName, parameterTypes);144
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if (m != null)147
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return (m);149
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return (findMethod_(clazz, methodName, parameterTypes));152
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}154
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/**157
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* Gets the public method from the given class without exceptions.159
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* 161
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* @param clazz163
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* @param methodName165
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* @param parameterTypes167
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* 169
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* @return the method or null, if it doesn't exist or other problems occurr.171
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*/173
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public static Method getPublicMethod(Class<?> clazz, String methodName,175
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