Java Class New Instance newInstance(String className, Class[] parmsCls, Object[] parms)

Description

Creates new instance of an specified class

License

Open Source License

Parameter

Parameter	Description
className	specified class name
parmsCls	parameters types of constructor
parms	parameters of constructor

Return

new instance

Declaration

public static Object newInstance(String className, Class[] parmsCls, Object[] parms) throws Exception 

Method Source Code

//package com.java2s;
/*/*from   w w  w . jav  a 2  s  .c  o  m*/
 * $Id: Util.java,v 1.8 2002/07/15 02:15:03 skavish Exp $
 *
 * ===========================================================================
 *
 * The JGenerator Software License, Version 1.0
 *
 * Copyright (c) 2000 Dmitry Skavish (skavish@usa.net). All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *    "This product includes software developed by Dmitry Skavish
 *     (skavish@usa.net, http://www.flashgap.com/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The name "The JGenerator" must not be used to endorse or promote
 *    products derived from this software without prior written permission.
 *    For written permission, please contact skavish@usa.net.
 *
 * 5. Products derived from this software may not be called "The JGenerator"
 *    nor may "The JGenerator" appear in their names without prior written
 *    permission of Dmitry Skavish.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL DMITRY SKAVISH OR THE OTHER
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

import java.lang.reflect.*;

public class Main {
    /**
     * Creates new instance of an specified class
     *
     * @param className specified class name
     * @param parmsCls  parameters types of constructor
     * @param parms     parameters of constructor
     * @return new instance
     * @exception Exception
     */
    public static Object newInstance(String className, Class[] parmsCls, Object[] parms) throws Exception {
        Class clazz = Class.forName(className);
        if (parmsCls == null) {
            return clazz.newInstance();
        } else {
            Constructor constr = clazz.getConstructor(parmsCls);
            return constr.newInstance(parms);
        }
    }
}

Related

1. newInstance(String className)
2. newInstance(String className, Class instanceClazz)
3. newInstance(String className, Class cls)
4. newInstance(String className, Class context)
5. newInstance(String className, Class castTo)
6. newInstance(String className, Object arg1)
7. newInstance(String className, Object... args)
8. newInstance(String className, Object... args)
9. newInstance(String className, Object... parameters)