Java Reflection Method Invoke invokeMethod(Object target, String methodName, Object... parameters)

Description

invoke Method

License

Open Source License

Declaration

public static Object invokeMethod(Object target, String methodName, Object... parameters) 

Method Source Code

//package com.java2s;
/* /*from   ww  w  .ja  v  a  2 s  .  co  m*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.lang.reflect.Method;

public class Main {
    public static Object invokeMethod(Object target, String methodName, Object... parameters) {
        try {
            final Method method = extractMethod(target, methodName);
            method.setAccessible(true);
            return method.invoke(target, parameters);
        } catch (Exception e) {
            throw new RuntimeException("Could not invoke method.", e);
        }
    }

    public static Method extractMethod(Object target, String methodName) {
        final Method[] declaredMethods = target.getClass().getDeclaredMethods();
        for (Method method : declaredMethods) {
            if (method.getName().equals(methodName)) {
                return method;
            }
        }

        throw new RuntimeException("Method not found: " + methodName);
    }
}

Related

1. invokeMethod(Object target, Method method)
2. invokeMethod(Object target, Method method)
3. invokeMethod(Object target, Method method, Object... args)
4. invokeMethod(Object target, Method method, Object[] args)
5. invokeMethod(Object target, String method)
6. invokeMethod(Object target, String methodName, Object[] arguments)
7. invokeMethod(Object target, String name, Class... parameterTypes)
8. invokeMethod(Object target, String name, Object[] args, Class[] argTypes)
9. invokeMethod(Object target, String signature, Object... args)