Java Reflection Constructor Invoke invokeConstructor(Class clazz, Class[] paramTypes, Object[] params)

Description

Creates a new instance of the given clazz, paramTypes, params

License

Open Source License

Parameter

Parameter	Description
clazz	clazz
paramTypes	paramTypes
params	params

Exception

Parameter	Description
IllegalAccessException	exception
InvocationTargetException	exception
InstantiationException	exception
NoSuchMethodException	exception

Return

instance

Declaration

public static Object invokeConstructor(Class<?> clazz, Class<?>[] paramTypes, Object[] params)
        throws IllegalAccessException, InvocationTargetException, InstantiationException,
        NoSuchMethodException 

Method Source Code

//package com.java2s;
/**/*from  ww  w  . j  a v a 2s.  c  o m*/
 * Copyright 2017 Shynixn
 * <p>
 * Do not remove this header!
 * <p>
 * Version 1.0
 * <p>
 * MIT License
 * <p>
 * Copyright (c) 2016
 * <p>
 * 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:
 * <p>
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * <p>
 * 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.Constructor;
import java.lang.reflect.InvocationTargetException;

public class Main {
    /**
     * Creates a new instance of the given clazz, paramTypes, params
     *
     * @param clazz      clazz
     * @param paramTypes paramTypes
     * @param params     params
     * @return instance
     * @throws IllegalAccessException    exception
     * @throws InvocationTargetException exception
     * @throws InstantiationException    exception
     * @throws NoSuchMethodException     exception
     */
    public static Object invokeConstructor(Class<?> clazz, Class<?>[] paramTypes, Object[] params)
            throws IllegalAccessException, InvocationTargetException, InstantiationException,
            NoSuchMethodException {
        if (clazz == null)
            throw new IllegalArgumentException("Class cannot be null!");
        if (paramTypes == null)
            throw new IllegalArgumentException("ParamTypes cannot be null");
        if (params == null)
            throw new IllegalArgumentException("Params cannot be null!");
        final Constructor constructor = clazz.getDeclaredConstructor(paramTypes);
        constructor.setAccessible(true);
        return constructor.newInstance(params);
    }
}

Related

1. invoke(Constructor constructor)
2. invoke(Constructor constructor, Object... args)
3. invoke(Constructor constructor, Object... args)
4. invokeConstructor(Class clazz, Object... parameters)
5. invokeConstructor(Class objectClass, Class[] classes, Object... params)
6. invokeConstructor(Class clazz, Class[] argTypes, Object[] args)
7. invokeConstructor(Class cls)