Java Method Call invoke(Object objToInvoke, Class classToInvoke, String method, Class[] argumentClasses, Object[] arguments)

Description

Invoke a method via reflection

License

Open Source License

Parameter

Parameter	Description
objToInvoke	The object you want to invoke
classToInvoke	Which class owns the method
method	The name of the method
argumentClasses	The argument classes that should be passed to the method
arguments	The arguments that should be passed to the method

Exception

Parameter	Description
NoSuchMethodException	If the method name does not exist
InvocationTargetException	If the underlying method throws an exception.
IllegalAccessException	When the method can not be accessed

Return

The return value of the method

Declaration

public static Object invoke(Object objToInvoke, Class<?> classToInvoke, String method, Class[] argumentClasses,
        Object[] arguments) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2017, i8c N.V. (Integr8 Consulting; http://www.i8c.be)
 * All Rights Reserved./*  ww  w  . jav  a  2 s  . c om*/
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 *******************************************************************************/

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Main {
    /**
     * Invoke a method via reflection
     *
     * @param objToInvoke The object you want to invoke
     * @param classToInvoke Which class owns the method
     * @param method The name of the method
     * @param argumentClasses The argument classes that should be passed to the method
     * @param arguments The arguments that should be passed to the method
     *
     * @return The return value of the method
     *
     * @throws NoSuchMethodException If the method name does not exist
     * @throws InvocationTargetException If the underlying method throws an exception.
     * @throws IllegalAccessException When the method can not be accessed
     */
    public static Object invoke(Object objToInvoke, Class<?> classToInvoke, String method, Class[] argumentClasses,
            Object[] arguments) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        Method m = classToInvoke.getDeclaredMethod(method, argumentClasses);
        Object o;

        if (m.isAccessible())
            o = m.invoke(objToInvoke, arguments);
        else {
            m.setAccessible(true);
            o = m.invoke(objToInvoke, arguments);
            m.setAccessible(false);
        }

        return o;
    }
}

Related

1. invoke(Object object, String method, Object... args)
2. invoke(Object object, String methodName)
3. invoke(Object object, String methodName, Class[] argTypes, Object... args)
4. invoke(Object object, String methodName, Class returnType, Object... parameters)
5. invoke(Object object, String methodName, Object[] args)
6. invoke(Object owner, String methodName)
7. invoke(Object proxy, java.lang.reflect.Method method, Object[] args)
8. invoke(Object source, String key)
9. invoke(Object target, Class clazz, String methodName, Class[] parameterTypes, Object... args)