Java Reflection Method Invoke invokeMethod(Object obj, String methodName, Object... args)

Here you can find the source of invokeMethod(Object obj, String methodName, Object... args)

Description

Invokes a method (even private methods).

License

Open Source License

Parameter

Parameter Description
obj Object on which to invoke a method
methodName Method to invoke
args Method arguments

Declaration

public static void invokeMethod(Object obj, String methodName, Object... args) 

Method Source Code

//package com.java2s;
/**/*from   w w w . ja  va 2  s  . c  om*/
 * The MIT License
 *
 * Copyright (c) 2011 by Dustin R. Callaway
 *
 * 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.AccessibleObject;
import java.lang.reflect.Method;

public class Main {
    /**
     * Invokes a method (even private methods).
     *
     * @param obj Object on which to invoke a method
     * @param methodName Method to invoke
     * @param args Method arguments
     */
    public static void invokeMethod(Object obj, String methodName, Object... args) {
        try {
            Class[] arglist = null;
            if (args != null) {
                arglist = new Class[args.length];

                for (int i = 0; i < arglist.length; i++) {
                    arglist[i] = args[i].getClass();
                }
            }

            Method m = obj.getClass().getDeclaredMethod(methodName, arglist);
            AccessibleObject[] ao = { m };
            AccessibleObject.setAccessible(ao, true);
            m.invoke(obj, args);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

Related

  1. invokeMethod(Object obj, Class type, String name, Class[] parameterTypes, Object[] parameters)
  2. invokeMethod(Object obj, Method method, Object... args)
  3. invokeMethod(Object obj, String mehtodName, Object... parameter)
  4. invokeMethod(Object obj, String method)
  5. invokeMethod(Object obj, String method, Object... args)
  6. invokeMethod(Object obj, String methodName, Object... args)
  7. invokeMethod(Object obj, String methodname, Object... args)
  8. invokeMethod(Object obj, String methodName, Object... params)
  9. invokeMethod(Object obj, String methodName, Object[] params, Class[] paramTypes)