Java Class New Instance newInstance(Class klass, Class[] paramTypes, Object... params)

Description

new Instance

License

Open Source License

Declaration

private static <T> T newInstance(Class<T> klass, Class<?>[] paramTypes, Object... params) 

Method Source Code

//package com.java2s;
/*//w ww . j  a v  a 2  s. co m
 * The MIT License
 *
 * Copyright 2014 Karol Bucek.
 *
 * 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.Constructor;

import java.lang.reflect.InvocationTargetException;

public class Main {
    private static <T> T newInstance(Class<T> klass, Class<?>[] paramTypes, Object... params) {
        final Constructor<T> constructor;
        try {
            constructor = klass.getDeclaredConstructor(paramTypes);
            constructor.setAccessible(true);
            return constructor.newInstance(params);
        } catch (NoSuchMethodException e) {
            throw new IllegalStateException(e.getMessage(), e);
        } catch (InvocationTargetException e) {
            throw new IllegalStateException(e.getTargetException());
        } catch (InstantiationException e) {
            throw new IllegalStateException(e);
        } catch (IllegalAccessException e) {
            throw new IllegalStateException(e);
        }
    }
}

Related

1. newInstance(Class elementType, int len)
2. newInstance(Class klass)
3. newInstance(Class klass)
4. newInstance(Class klass)
5. newInstance(Class klass)
6. newInstance(Class klass, Object... args)
7. newInstance(Class listener)
8. newInstance(Class sourceClass)
9. newInstance(Class targetType, String className, ClassLoader loader)