Java Reflection Method Main Invoke invokeMain(Class clazz, String[] args)

Description

invoke Main

License

Open Source License

Declaration

public static void invokeMain(Class clazz, String[] args)
            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException 

Method Source Code

//package com.java2s;
/*//  w w  w . jav a2 s. c om
 * The MIT License
 *
 * Copyright 2015 iychoi.
 *
 * 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.InvocationTargetException;
import java.lang.reflect.Method;

public class Main {
    public static void invokeMain(Class clazz, String[] args)
            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
        if (clazz == null) {
            throw new IllegalArgumentException("clazz is not given");
        }

        Method method = null;

        try {
            // find main function
            Class[] argTypes = new Class[] { String[].class };
            method = clazz.getDeclaredMethod("main", argTypes);
        } catch (NoSuchMethodException ex) {
            throw new NoSuchMethodException("main function was not found in " + clazz.getName() + " class");
        }
        try {
            method.invoke(null, (Object) args);
        } catch (IllegalAccessException ex) {
            throw ex;
        } catch (IllegalArgumentException ex) {
            throw ex;
        } catch (InvocationTargetException ex) {
            throw ex;
        }
    }
}

Related

1. invoke(String property, Object main)
2. invokeMain(Class fooClass)
3. invokeMain(Class mainClass, List args)
4. invokeMain(ClassLoader classloader, String classname, String[] args)
5. invokeMain(Method main, String[] args)