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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。

欢马劈雪

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检查给定的类“ clazz”是否覆盖类“ base Clazz”中的给定方法。

实例源码：

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/**

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,

* this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,

* this list of conditions and the following disclaimer in the documentation

* and/or other materials provided with the distribution.

* Neither the name of the 'Xith3D Project Group' nor the names of its

* contributors may be used to endorse or promote products derived from this

* software without specific prior written permission.

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) A

* RISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

* POSSIBILITY OF SUCH DAMAGE

//package com.nowjava;/**时代Java公众号 - N o w J a  v a . c o m**/

import java.lang.reflect.Method;

public class Main {

public static void main(String[] argv) throws Exception {

Class baseClazz = String.class;

Class clazz = String.class;

String methodName = "nowjava.com";

Class parameterTypes = String.class;

System.out.println(overridesMethod(baseClazz, clazz, methodName,

parameterTypes));

}

/**

* Checks, whether the given Class 'clazz' overrides the given method in the Class 'baseClazz'.

* @param baseClazz the Class declaring the base method

* @param clazz the sub class possibly overriding the method

* @param methodName the name of the method

* @param parameterTypes the parameters of the method

* @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.

public static Boolean overridesMethod(Class<?> baseClazz,/* 来自 n  o  w  j  a  v  a . c o m*/

Class<?> clazz, String methodName, Class<?>... parameterTypes) {

Method m = findMethod(clazz, methodName, parameterTypes);

if (m == null)

return (null);

return (m.getDeclaringClass() != baseClazz);

}

/**

* Gets the method from the given class without exceptions and also searches super classes.

* @param clazz

* @param methodName

* @param parameterTypes

* @return the method or null, if it doesn't exist or other problems occurr.

public static Method findMethod(Class<?> clazz, String methodName,

Class<?>... parameterTypes) {

Method m = getPublicMethod(clazz, methodName, parameterTypes);

if (m != null)

return (m);

return (findMethod_(clazz, methodName, parameterTypes));

}

/**

* Gets the public method from the given class without exceptions.

* @param clazz

* @param methodName

* @param parameterTypes

* @return the method or null, if it doesn't exist or other problems occurr.

public static Method getPublicMethod(Class<?> clazz, String methodName,
/**代码未完, 请加载全部代码(NowJava.com).**/

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编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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