invoke Method - Java Reflection

Java examples for Reflection:Method

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Description

invoke Method

Demo Code

/*//from w w  w.  j a  v a 2  s  . c  om
 * Copyright COCKTAIL (www.cocktail.org), 1995, 2011 This software
 * is governed by the CeCILL license under French law and abiding by the
 * rules of distribution of free software. You can use, modify and/or
 * redistribute the software under the terms of the CeCILL license as
 * circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info".
 * As a counterpart to the access to the source code and rights to copy, modify
 * and redistribute granted by the license, users are provided only with a
 * limited warranty and the software's author, the holder of the economic
 * rights, and the successive licensors have only limited liability. In this
 * respect, the user's attention is drawn to the risks associated with loading,
 * using, modifying and/or developing or reproducing the software by the user
 * in light of its specific status of free software, that may mean that it
 * is complicated to manipulate, and that also therefore means that it is
 * reserved for developers and experienced professionals having in-depth
 * computer knowledge. Users are therefore encouraged to load and test the
 * software's suitability as regards their requirements in conditions enabling
 * the security of their systems and/or data to be ensured and, more generally,
 * to use and operate it in the same conditions as regards security. The
 * fact that you are presently reading this means that you have had knowledge
 * of the CeCILL license and that you accept its terms.
 */
//package com.java2s;
import java.lang.reflect.Method;

public class Main {
    public static Object invokeMethod(Object object, String methodName) {
        return invokeMethod(object, methodName, (Object[]) null,
                (Class[]) null);
    }

    public static Object invokeMethod(Object object, String methodName,
            Object arg, Class argType) {
        return invokeMethod(object, methodName, new Object[] { arg },
                new Class[] { argType });
    }

    public static Object invokeMethod(Object object, String methodName,
            Object[] args, Class[] argTypes) {
        Object result = null;
        try {
            Class cls = object.getClass();
            Method method = cls.getMethod(methodName, argTypes);
            result = method.invoke(object, args);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
}

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